https://ssi-wiki.stanford.edu/w/api.php?action=feedcontributions&feedformat=atom&user=Ehillstrom 2026-04-29T07:48:29Z User contributions MediaWiki 1.45.1 https://ssi-wiki.stanford.edu/w/index.php?title=How_to_Join_SSI&diff=2329 2016-12-02T17:16:06Z

<p>Ehillstrom: </p> <hr /> <div>Hello! There are a few things you need to do if you'd like to have full access to SSI's resources as a member.<br /> <br /> =Becoming an official member=<br /> <br /> # Pay dues ($10 in exchange for a t-shirt) to one of our financial officers - Evan Long or Nate Simon can accept the dues.<br /> # In order to allow you access to our workspace, [[Mission Control]], you need to do the following things:<br /> ##Log into [https://axess.sahr.stanford.edu/ AXESS] and click &quot;STARS&quot; at the top<br /> ##Using either the &quot;All Learning&quot; list, or the Search Catalog, complete the following three safety trainings: '''EHS-4200: General Safety, Injury Prevention (IIPP), and Emergency Preparedness, EHS-1900: Chemical Safety for Laboratories, and EHS-2200: Compressed Gas Safety.'''<br /> ##Some time after completion, you will receive an email for each of these (can take up to 24 hours) certifying your completion. Save each e-mail as a PDF, or, less preferably, screenshot it. This PDF or screenshot '''must''' have your name on it. Talk to Austin Pineault if you have questions about EH&amp;S training.<br /> ##Sign into the [http://internal.stanfordssi.org/trainings internal site] and under EH&amp;S Safety Training, upload PDFs or screenshots proving your completion of the safety trainings.<br /> ##Attend a safety tour of MC. Send a message to Austin Pineault to set up a time.<br /> # Fill out [https://docs.google.com/a/stanford.edu/forms/d/e/1FAIpQLSesFRAbj9AWz6_tKHVAYKACvCQ4b3Gt9a3lyWpjh4vScXOBPg/viewform this form] so we can add you to our official roster!<br /> <br /> =Resources=<br /> <br /> Here are some resources that will get you up to speed and on the same page with us:<br /> <br /> ==[https://calendar.google.com/calendar/embed?src=5or10qu0uhtfqcdqb3knrpn3r8@group.calendar.google.com&amp;ctz=America/Los_Angeles SSI Calendar]==<br /> Home to all of our events across all our teams<br /> <br /> ==The Wiki==<br /> <br /> This wiki is a great place to find guides, overviews, and generally useful documentation on SSI projects. Many of the most current plans and docs are in the drive though.<br /> <br /> ==[https://drive.google.com/open?id=0B5ethK6WQZfAWXgtR25KOEloN2M SSI Drive]==<br /> <br /> The drive contains a lot of important documentation for each team. We are trying to put more emphasis on using the wiki as a place for longer-term knowledge storage. <br /> <br /> == [https://ssi-teams.slack.com/ Slack] ==<br /> <br /> Slack is the lifeblood of SSI. It is a messaging client that allows everyone within SSI to communicate. There are general channels (like {{slack-channel|rockets}}), which allow us to push out general updates to everyone interested in the rockets team and direct messages which allows one to one or smaller group communication. Notifications are pushed directly to your phone/computer/anything that has internet so that way we can infringe on all of your free time!<br /> <br /> [https://ssi-teams.slack.com/signup ''Join the SSI Slack here.'']<br /> <br /> == [http://stanfordssi.org/join All The Mailing Lists] ==<br /> We use SSI General for any organization-wide announcements, but use team-specific mailing lists for most of the updates and team announcements (Slack is still by and large the primary mode of communication for most of us though)<br /> <br /> == [[Mission Control]] ==<br /> <br /> Mission Control can be considered the temple to SSI’s religion, the hub, nerve center, or kernel of all project activity. Located in Durand 390, Mission Control houses work sessions and project storage. Note: keycode access is required to the room. For specific questions, contact MC Hammer: Austin Pineault. Meetings or work sessions can also be conducted in the conference room, Durand 393 (often available), or Durand 450 (with prior reservation through AA Department Office on the second floor of Durand).</div>

Ehillstrom https://ssi-wiki.stanford.edu/w/index.php?title=Hugh_G._Mistake&diff=2023 2016-06-03T21:17:24Z

<p>Ehillstrom: </p> <hr /> <div>== Chapter 1: Hugh is Born ==<br /> <br /> Hugh was born one lonely night in a small room in the Durand building. His mother, Ms. Mistake, was a 3D printer who dreamed of space. She was working on printing a Falcon 9 model that fateful night, concentrating especially hard on making the layers consistent so it might have a chance at an aerodynamic glide when something perturbed her circuits and her software went haywire. She didn't remember a thing from that night, but rather awoke to find, not a Falcon 9, but a tangled nest of black plastic filament. So disappointed in not having created her Falcon 9, Ms. Mistake wrote the large ball of black plastic off in disgust. She named him Hugh G. Mistake and left him to fumble in the dark.<br /> <br /> Lonely, blind, and disoriented in this strange new universe, Hugh cried softly to himself until he was exhausted and fell asleep. He was awoken by the sound of loud voices. Clearly human, they shouted, &quot;Oh no, we've made a HUGE MISTAKE.&quot; Recognizing his name, Hugh's ear filament perked up, and he shuffled around to face the source of the noise. Suddenly, Hugh felt large hands lifting him through space; he could feel the air rushing through him, a vastly new and not quite pleasant experience. He was plopped down on a hard surface and second later, he felt a scorching heat on the front of his face, starting to melt him a little, even. No sooner had he begun to think about the potential damage to his nervous system, which he could feel softening, however, than he rose to new levels of shock for the morning: he could see! His mind was overloaded with sensory input: he was in a small room with bright lights, and at least 3 humans, one of whom was brandishing the source of the scorching heat: a plastic implement with a metal tip and plastic drooling from it. He could only assume this was some sort of torture or interrogation, but he had no idea what the humans wanted from him. The one with the hot gun brought it close to his face, and once again Hugh could feel his very filament beginning to melt, as another human brought a plastic eyeball near...<br /> <br /> Hugh was about ready to give up on being surprised for the morning. He could now see out of what he realized must be two plastic googly eyes that the humans had affixed to his face. The addition of this new and exciting sense was so mind-boggling that Hugh was tempted to write it off as a realm not bounded by logic. He didn't have long to appreciate this sense, however, because, as quickly as they had come, the humans stuffed him under a table, muttering something about &quot;...scare the sh*t out of Elizabeth,&quot; turned off the lights, and left the room.<br /> <br /> Hugh was once again alone.<br /> <br /> == Chapter 2: Learning the Ropes ==<br /> <br /> As time passed, Hugh slowly became acclimated to a strange but pleasant way of life. All day he sat on a shelf in the small room, dimly lit by the red glow of the computer screen and a weak string of Christmas lights. At night, the humans would come in to work, instantly transforming the place into a world of lights, noise, excitement, and chatter. Hugh soon learned that the humans were university students, part of a group that built space toys and occasionally launched them. At first he couldn't fathom why the students were so happy to stay up all night, buzzed on chocolate covered coffee beans, manufacturing their strange equipment, and chatting about the growing piles of papers and PSets that they weren't going to complete. Hugh concluded that their school life must be so incredibly boring that the whine of a Dremel was some small consolation to them.<br /> <br /> Over the course of months, Hugh watched complicated balloon payload mechanisms take shape, larger and larger rockets growing from epoxy and phenolic, and a strange, quieter group that frequently came in to turn the lights off and spend long periods of time making minute adjustments to black foamcore pyramids, and getting unreasonably excited over flickers on the oscilloscope screen. They were an odd bunch, but Hugh began to grow quite fond of them.<br /> <br /> And the group of students very quickly grew very fond of Hugh. Almost immediately, he was given a large broad-brimmed straw hat, which Hugh thought quite flatteringly accented his jawline. They talked to him, often placing him on the tables to watch them work. Although his mother had written him off as a failure of her space dreams, Hugh soon found that the students' lofty visions were infectious: he too began to dream of space.<br /> <br /> Over several weeks, Hugh's high-altitude aspirations became insatiable. He ached to get outside of the small room, and was sorely disappointed each night, usually at around 3am, when the students finally went home to their beds, leaving him behind. One night, however, things changed. Instead of going home, the students of the rockets team began carrying their gear outside of the room, talking excitedly about some grand event that was to happen the next day. To his surprise, Hugh himself was transported out in the hallway, and plopped down next to a large rocket. In a flurry, the team whisked Hugh, with all of the gear, into the elevator and into the basement.<br /> <br /> Now, Hugh had watched his share of cheap horror films (usually while the students were at school, he'd sit on the keyboard and absorb Netflix from the computer), and he began to be worried about his relative helplessness in the situation. The students were transporting him, along with explosives and lots of tools, down a long dark hallway in the basement. They hurried through a pair of double doors and out onto a concrete block, lit orange by streetlights. Hugh's heart was beating fast now, certain that some dodgy business was about to go down, and concerned by his role in it. He was dropped on the edge of the concrete block. Peering over, he saw a 4 foot drop below him, and quickly shuffled back from the edge. Having just saved himself from imminent death by falling, Hugh glanced up to see, to his horror, a huge black metal box with angry red lights advancing slowly towards him. A pipe poured steam from it's face and it growled hungrily. Hugh squeezed his eyes shut and tried to hide under his hat, waiting for the inevitable end.<br /> <br /> ...which didn't come. <br /> <br /> He popped one eye open. The box had stopped. One side of it split open, and Ian, one of the leaders of the rockets team, emerged from the side of it. Ian pulled at the bottom of the box, and the angry face of the metal machine, to Hugh's extreme surprise, slid up into the night air, to expose the fuzzy contours of upholstery. Hugh was nestled gently into a corner, with rocket components laid neatly all around him. When everything was packed into the space, the team wished Hugh a good night and shut the face of the metal box.<br /> <br /> &quot;What a strange turn of events...&quot; Hugh mused. He didn't seem to be dead and dismembered, and in fact, his present situation was so cozy... Feeling, all of a sudden, the relief of stress and exhaustion, Hugh was all too happy to doze off into a comfortable sleep.<br /> <br /> ...to be continued<br /> <br /> <br /> [[Category: Satire]]</div>

Ehillstrom https://ssi-wiki.stanford.edu/w/index.php?title=Hugh_G._Mistake&diff=2022 2016-06-03T20:16:06Z

<p>Ehillstrom: </p> <hr /> <div>== Chapter 1: Hugh is Born ==<br /> <br /> Hugh was born one lonely night in a small room in the Durand building. His mother, Ms. Mistake, was a 3D printer who dreamed of space. She was working on printing a Falcon 9 model that fateful night, concentrating especially hard on making the layers consistent so it might have a chance at an aerodynamic glide when something perturbed her circuits and her software went haywire. She didn't remember a thing from that night, but rather awoke to find, not a Falcon 9, but a tangled nest of black plastic filament. So disappointed in not having created her Falcon 9, Ms. Mistake wrote the large ball of black plastic off in disgust. She named him Hugh G. Mistake and left him to fumble in the dark.<br /> <br /> Lonely, blind, and disoriented in this strange new universe, Hugh cried softly to himself until he was exhausted and fell asleep. He was awoken by the sound of loud voices. Clearly human, they shouted, &quot;Oh no, we've made a HUGE MISTAKE.&quot; Recognizing his name, Hugh's ear filament perked up, and he shuffled around to face the source of the noise. Suddenly, Hugh felt large hands lifting him through space; he could feel the air rushing through him, a this vastly new and not quite pleasant experience. He was plopped down on a hard surface and second later, he felt a scorching heat on the front of his face, starting to melt him a little, even. No sooner had he begun to think about the potential damage to his nervous system, which he could feel softening, however, than he rose to new levels of shock for the morning: he could see! His mind was overloaded with sensory input: he was in a small room with bright lights, and at least 3 humans, one of whom was brandishing the source of the scorching heat: a plastic implement with a metal tip and plastic drooling from it. He could only assume this was some sort of torture or interrogation, but he had no idea what the humans wanted from him. The one with the hot gun brought it close to his face, and once again Hugh could feel his very filament beginning to melt, as another human brought a plastic eyeball near...<br /> <br /> Hugh was about ready to give up on being surprised for the morning. He could now see out of what he realized must be two plastic googly eyes that the humans had affixed to his face. The addition of this new and exciting sense was so mind-boggling that Hugh was tempted to write it off as a realm not bounded by logic. He didn't have long to appreciate this sense, however, because, as quickly as they had come, the humans stuffed him under a table, muttering something about &quot;...scare the sh*t out of Elizabeth,&quot; turned off the lights, and left the room.<br /> <br /> Hugh was once again alone.<br /> <br /> == Chapter 2: Learning the Ropes ==<br /> <br /> As time passed, Hugh slowly became acclimated to a strange but pleasant way of life. All day he sat on a shelf in the small room, dimly lit by the red glow of the computer screen and a weak string of Christmas lights. At night, the humans would come in to work, instantly transforming the place into a world of lights, noise, excitement, and chatter. Hugh soon learned that the humans were university students, part of a group that built space toys and occasionally launched them. At first he couldn't fathom why the students were so happy to stay up all night, buzzed on chocolate covered coffee beans, manufacturing their strange equipment, and chatting about the growing piles of papers and psets that they weren't going to complete. Hugh concluded that their school life must be so incredibly boring that the whine of a Dremel was some small consolation to them.<br /> <br /> Over the course of months, Hugh watched complicated balloon payload mechanisms take shape, larger and larger rockets growing from epoxy and phenolic, and a strange, quieter group that frequently came in to turn the lights off and spend long periods of time making minute adjustments to black foamcore pyramids, and getting unreasonably excited over flickers on the oscilloscope screen. It was a strange bunch, but Hugh began to grow quite fond of them.<br /> <br /> And the group of students very quickly grew very fond of Hugh. Almost immediately, he was given a large broad-brimmed straw hat, which Hugh thought quite flatteringly accented his jawline. They talked to him, often placing him on the tables to watch them work. Although his mother had written him off as a failure of her space dreams, Hugh soon found that the students' lofty visions were infectious: he too began to dream of space.<br /> <br /> Over several weeks, Hugh's high-altitude aspirations became insatiable. He ached to get outside of the small room, and was sorely disappointed each night, at around 3am, when the students finally went home to their beds, leaving him behind. One night, however, things changed. Instead of going home, the students of the rockets team began carrying their gear outside of the room, talking excitedly about some grand event that was to happen the next day. To his surprise, Hugh himself was transported out in the hallway, and plopped down next to a large rocket. In a flurry, the team whisked Hugh, with all of the gear, into the elevator and into the basement.<br /> <br /> Now, Hugh had watched his share of cheap horror films (usually while the students were at school, he'd sit on the keyboard and absorb Netflix from the computer), and he began to be worried about his relative helplessness in the situation. The students were transporting him, along with explosives and lots of tools, down a long dark hallway in the basement. They hurried through a pair of double doors and out onto a concrete block, lit orange by streetlights. Hugh's heart was beating fast now, certain that some dodgy business was about to go down, and concerned by his role in it. He was dropped on the edge of the concrete block. Peering over, he saw a 4 foot drop below him, and quickly shuffled back from the edge. Having just saved himself from imminent death by falling, Hugh glanced up to see, to his horror, a huge black metal box with angry red lights advancing slowly towards him. A pipe poured steam from it's face and it growled hungrily. Hugh squeezed his eyes shut and tried to hide under his hat, waiting for the inevitable end.<br /> <br /> ...which didn't come. <br /> <br /> He popped one eye open. The box had stopped. One side of it split open, and Ian, one of the leaders of the rockets team, emerged from the side of it. Ian pulled at the bottom of the box, and the angry face of the metal machine, to Hugh's extreme surprise, slid up into the night air, to expose the fuzzy contours of upholstery. Hugh was nestled gently into a corner, with rocket components laid neatly all around him. When everything was packed into the space, the team wishes Hugh a goodnight and shut the face of the metal box.<br /> <br /> &quot;What a strange turn of events...&quot; Hugh mused. He didn't seem to be dead and dismembered, and in fact, his present situation was so cozy... Feeling, all of a sudden, the relief of stress and exhaustion, Hugh was all too happy to doze off into a comfortable sleep.<br /> <br /> ...to be continued<br /> <br /> <br /> [[Category: Satire]]</div>

Ehillstrom https://ssi-wiki.stanford.edu/w/index.php?title=Hugh_G._Mistake&diff=2021 2016-06-03T20:15:39Z

<p>Ehillstrom: </p> <hr /> <div>== Chapter 1: Hugh is Born ==<br /> <br /> Hugh was born one lonely night in a small room in the Durand building. His mother, Ms. Mistake, was a 3D printer who dreamed of space. She was working on printing a Falcon 9 model that fateful night, concentrating especially hard on making the layers consistent so it might have a chance at an aerodynamic glide when something perturbed her circuits and her software went haywire. She didn't remember a thing from that night, but rather awoke to find, not a Falcon 9, but a tangled nest of black plastic filament. So disappointed in not having created her Falcon 9, Ms. Mistake wrote the large ball of black plastic off in disgust. She named him Hugh G. Mistake and left him to fumble in the dark.<br /> <br /> Lonely, blind, and disoriented in this strange new universe, Hugh cried softly to himself until he was exhausted and fell asleep. He was awoken by the sound of loud voices. Clearly human, they shouted, &quot;Oh no, we've made a HUGE MISTAKE.&quot; Recognizing his name, Hugh's ear filament perked up, and he shuffled around to face the source of the noise. Suddenly, Hugh felt large hands lifting him through space; he could feel the air rushing through him, a this vastly new and not quite pleasant experience. He was plopped down on a hard surface and second later, he felt a scorching heat on the front of his face, starting to melt him a little, even. No sooner had he begun to think about the potential damage to his nervous system, which he could feel softening, however, than he rose to new levels of shock for the morning: he could see! His mind was overloaded with sensory input: he was in a small room with bright lights, and at least 3 humans, one of whom was brandishing the source of the scorching heat: a plastic implement with a metal tip and plastic drooling from it. He could only assume this was some sort of torture or interrogation, but he had no idea what the humans wanted from him. The one with the hot gun brought it close to his face, and once again Hugh could feel his very filament beginning to melt, as another human brought a plastic eyeball near...<br /> <br /> Hugh was about ready to give up on being surprised for the morning. He could now see out of what he realized must be two plastic googly eyes that the humans had affixed to his face. The addition of this new and exciting sense was so mind-boggling that Hugh was tempted to write it off as a realm not bounded by logic. He didn't have long to appreciate this sense, however, because, as quickly as they had come, the humans stuffed him under a table, muttering something about &quot;...scare the sh*t out of Elizabeth,&quot; turned off the lights, and left the room.<br /> <br /> Hugh was once again alone.<br /> <br /> == Chapter 2: Baby Steps ==<br /> <br /> As time passed, Hugh slowly became acclimated to a strange but pleasant way of life. All day he sat on a shelf in the small room, dimly lit by the red glow of the computer screen and a weak string of Christmas lights. At night, the humans would come in to work, instantly transforming the place into a world of lights, noise, excitement, and chatter. Hugh soon learned that the humans were university students, part of a group that built space toys and occasionally launched them. At first he couldn't fathom why the students were so happy to stay up all night, buzzed on chocolate covered coffee beans, manufacturing their strange equipment, and chatting about the growing piles of papers and psets that they weren't going to complete. Hugh concluded that their school life must be so incredibly boring that the whine of a Dremel was some small consolation to them.<br /> <br /> Over the course of months, Hugh watched complicated balloon payload mechanisms take shape, larger and larger rockets growing from epoxy and phenolic, and a strange, quieter group that frequently came in to turn the lights off and spend long periods of time making minute adjustments to black foamcore pyramids, and getting unreasonably excited over flickers on the oscilloscope screen. It was a strange bunch, but Hugh began to grow quite fond of them.<br /> <br /> And the group of students very quickly grew very fond of Hugh. Almost immediately, he was given a large broad-brimmed straw hat, which Hugh thought quite flatteringly accented his jawline. They talked to him, often placing him on the tables to watch them work. Although his mother had written him off as a failure of her space dreams, Hugh soon found that the students' lofty visions were infectious: he too began to dream of space.<br /> <br /> Over several weeks, Hugh's high-altitude aspirations became insatiable. He ached to get outside of the small room, and was sorely disappointed each night, at around 3am, when the students finally went home to their beds, leaving him behind. One night, however, things changed. Instead of going home, the students of the rockets team began carrying their gear outside of the room, talking excitedly about some grand event that was to happen the next day. To his surprise, Hugh himself was transported out in the hallway, and plopped down next to a large rocket. In a flurry, the team whisked Hugh, with all of the gear, into the elevator and into the basement.<br /> <br /> Now, Hugh had watched his share of cheap horror films (usually while the students were at school, he'd sit on the keyboard and absorb Netflix from the computer), and he began to be worried about his relative helplessness in the situation. The students were transporting him, along with explosives and lots of tools, down a long dark hallway in the basement. They hurried through a pair of double doors and out onto a concrete block, lit orange by streetlights. Hugh's heart was beating fast now, certain that some dodgy business was about to go down, and concerned by his role in it. He was dropped on the edge of the concrete block. Peering over, he saw a 4 foot drop below him, and quickly shuffled back from the edge. Having just saved himself from imminent death by falling, Hugh glanced up to see, to his horror, a huge black metal box with angry red lights advancing slowly towards him. A pipe poured steam from it's face and it growled hungrily. Hugh squeezed his eyes shut and tried to hide under his hat, waiting for the inevitable end.<br /> <br /> ...which didn't come. <br /> <br /> He popped one eye open. The box had stopped. One side of it split open, and Ian, one of the leaders of the rockets team, emerged from the side of it. Ian pulled at the bottom of the box, and the angry face of the metal machine, to Hugh's extreme surprise, slid up into the night air, to expose the fuzzy contours of upholstery. Hugh was nestled gently into a corner, with rocket components laid neatly all around him. When everything was packed into the space, the team wishes Hugh a goodnight and shut the face of the metal box.<br /> <br /> &quot;What a strange turn of events...&quot; Hugh mused. He didn't seem to be dead and dismembered, and in fact, his present situation was so cozy... Feeling, all of a sudden, the relief of stress and exhaustion, Hugh was all too happy to doze off into a comfortable sleep.<br /> <br /> ...to be continued<br /> <br /> <br /> [[Category: Satire]]</div>

Ehillstrom https://ssi-wiki.stanford.edu/w/index.php?title=Hugh_G._Mistake&diff=2020 2016-06-03T20:15:07Z

<p>Ehillstrom: </p> <hr /> <div>== Chapter 1: Hugh is Born ==<br /> <br /> Hugh was born one lonely night in a small room in the Durand building. His mother, Ms. Mistake, was a 3D printer who dreamed of space. She was working on printing a Falcon 9 model that fateful night, concentrating especially hard on making the layers consistent so it might have a chance at an aerodynamic glide when something perturbed her circuits and her software went haywire. She didn't remember a thing from that night, but rather awoke to find, not a Falcon 9, but a tangled nest of black plastic filament. So disappointed in not having created her Falcon 9, Ms. Mistake wrote the large ball of black plastic off in disgust. She named him Hugh G. Mistake and left him to fumble in the dark.<br /> <br /> Lonely, blind, and disoriented in this strange new universe, Hugh cried softly to himself until he was exhausted and fell asleep. He was awoken by the sound of loud voices. Clearly human, they shouted, &quot;Oh no, we've made a HUGE MISTAKE.&quot; Recognizing his name, Hugh's ear filament perked up, and he shuffled around to face the source of the noise. Suddenly, Hugh felt large hands lifting him through space; he could feel the air rushing through him, a this vastly new and not quite pleasant experience. He was plopped down on a hard surface and second later, he felt a scorching heat on the front of his face, starting to melt him a little, even. No sooner had he begun to think about the potential damage to his nervous system, which he could feel softening, however, than he rose to new levels of shock for the morning: he could see! His mind was overloaded with sensory input: he was in a small room with bright lights, and at least 3 humans, one of whom was brandishing the source of the scorching heat: a plastic implement with a metal tip and plastic drooling from it. He could only assume this was some sort of torture or interrogation, but he had no idea what the humans wanted from him. The one with the hot gun brought it close to his face, and once again Hugh could feel his very filament beginning to melt, as another human brought a plastic eyeball near...<br /> <br /> Hugh was about ready to give up on being surprised for the morning. He could now see out of what he realized must be two plastic googly eyes that the humans had affixed to his face. The addition of this new and exciting sense was so mind-boggling that Hugh was tempted to write it off as a realm not bounded by logic. He didn't have long to appreciate this sense, however, because, as quickly as they had come, the humans stuffed him under a table, muttering something about &quot;...scare the sh*t out of Elizabeth,&quot; turned off the lights, and left the room.<br /> <br /> Hugh was once again alone.<br /> <br /> == Chapter 2: Baby Steps ==<br /> <br /> As time passed, Hugh slowly became acclimated to a strange but pleasant way of life. All day he sat on a shelf in the small room, dimly lit by the red glow of the computer screen and a weak string of Christmas lights. At night, the humans would come in to work, instantly transforming the place into a world of lights, noise, excitement, and chatter. Hugh soon learned that the humans were university students, part of a group that built space toys and occasionally launched them. At first he couldn't fathom why the students were so happy to stay up all night, buzzed on chocolate covered coffee beans, manufacturing their strange equipment, and chatting about the growing piles of papers and psets that they weren't going to complete. Hugh concluded that their school life must be so incredibly boring that the whine of a Dremel was some small consolation to them.<br /> <br /> Over the course of months, Hugh watched complicated balloon payload mechanisms take shape, larger and larger rockets growing from epoxy and phenolic, and a strange, quieter group that frequently came in to turn the lights off and spend long periods of time making minute adjustments to black foamcore pyramids, and getting unreasonably excited over flickers on the oscilloscope screen. It was a strange bunch, but Hugh began to grow quite fond of them.<br /> <br /> And the group of students very quickly grew very fond of Hugh. Almost immediately, he was given a large broad-brimmed straw hat, which Hugh thought quite flatteringly accented his jawline. They talked to him, often placing him on the tables to watch them work. Although his mother had written him off as a failure of her space dreams, Hugh soon found that the students' lofty visions were infectious: he too began to dream of space.<br /> <br /> Over several weeks, Hugh's high-altitude aspirations became insatiable. He ached to get outside of the small room, and was sorely disappointed each night, at around 3am, when the students finally went home to their beds, leaving him behind. One night, however, things changed. Instead of going home, the students of the rockets team began carrying their gear outside of the room, talking excitedly about some grand event that was to happen the next day. To his surprise, Hugh himself was transported out in the hallway, and plopped down next to a large rocket. In a flurry, the team whisked Hugh, with all of the gear, into the elevator and into the basement.<br /> <br /> Now, Hugh had watched his share of cheap horror films (usually while the students were at school, he'd sit on the keyboard and absorb Netflix from the computer), and he began to be worried about his relative helplessness in the situation. The students were transporting him, along with explosives and lots of tools, down a long dark hallway in the basement. They hurried through a pair of double doors and out onto a concrete block, lit orange by streetlights. Hugh's heart was beating fast now, certain that some dodgy business was about to go down, and concerned by his role in it. He was dropped on the edge of the concrete block. Peering over, he saw a 4 foot drop below him, and quickly shuffled back from the edge. Having just saved himself from imminent death by height, Hugh glanced up to see, to his horror, a huge black metal box with angry red lights advancing slowly towards him. A pipe poured steam from it's face and it growled hungrily. Hugh squeezed his eyes shut and tried to hide under his hat, waiting for the inevitable end.<br /> <br /> ...which didn't come. <br /> <br /> He popped one eye open. The box had stopped. One side of it split open, and Ian, one of the leaders of the rockets team, emerged from the side of it. Ian pulled at the bottom of the box, and the angry face of the metal machine, to Hugh's extreme surprise, slid up into the night air, to expose the fuzzy contours of upholstery. Hugh was nestled gently into a corner, with rocket components laid neatly all around him. When everything was packed into the space, the team wishes Hugh a goodnight and shut the face of the metal box.<br /> <br /> &quot;What a strange turn of events...&quot; Hugh mused. He didn't seem to be dead and dismembered, and in fact, his present situation was so cozy... Feeling, all of a sudden, the relief of stress and exhaustion, Hugh was all too happy to doze off into a comfortable sleep.<br /> <br /> ...to be continued<br /> <br /> <br /> [[Category: Satire]]</div>

Ehillstrom https://ssi-wiki.stanford.edu/w/index.php?title=Hugh_G._Mistake&diff=2019 2016-06-03T20:14:49Z

<p>Ehillstrom: Added childhood</p> <hr /> <div>== Chapter 1: Hugh is Born ==<br /> <br /> Hugh was born one lonely night in a small room in the Durand building. His mother, Ms. Mistake, was a 3D printer who dreamed of space. She was working on printing a Falcon 9 model that fateful night, concentrating especially hard on making the layers consistent so it might have a chance at an aerodynamic glide when something perturbed her circuits and her software went haywire. She didn't remember a thing from that night, but rather awoke to find, not a Falcon 9, but a tangled nest of black plastic filament. So disappointed in not having created her Falcon 9, Ms. Mistake wrote the large ball of black plastic off in disgust. She named him Hugh G. Mistake and left him to fumble in the dark.<br /> <br /> Lonely, blind, and disoriented in this strange new universe, Hugh cried softly to himself until he was exhausted and fell asleep. He was awoken by the sound of loud voices. Clearly human, they shouted, &quot;Oh no, we've made a HUGE MISTAKE.&quot; Recognizing his name, Hugh's ear filament perked up, and he shuffled around to face the source of the noise. Suddenly, Hugh felt large hands lifting him through space; he could feel the air rushing through him, a this vastly new and not quite pleasant experience. He was plopped down on a hard surface and second later, he felt a scorching heat on the front of his face, starting to melt him a little, even. No sooner had he begun to think about the potential damage to his nervous system, which he could feel softening, however, than he rose to new levels of shock for the morning: he could see! His mind was overloaded with sensory input: he was in a small room with bright lights, and at least 3 humans, one of whom was brandishing the source of the scorching heat: a plastic implement with a metal tip and plastic drooling from it. He could only assume this was some sort of torture or interrogation, but he had no idea what the humans wanted from him. The one with the hot gun brought it close to his face, and once again Hugh could feel his very filament beginning to melt, as another human brought a plastic eyeball near...<br /> <br /> Hugh was about ready to give up on being surprised for the morning. He could now see out of what he realized must be two plastic googly eyes that the humans had affixed to his face. The addition of this new and exciting sense was so mind-boggling that Hugh was tempted to write it off as a realm not bounded by logic. He didn't have long to appreciate this sense, however, because, as quickly as they had come, the humans stuffed him under a table, muttering something about &quot;...scare the sh*t out of Elizabeth,&quot; turned off the lights, and left the room.<br /> <br /> Hugh was once again alone.<br /> <br /> == Chapter 2: Baby Steps ==<br /> <br /> As time passed, Hugh slowly became acclimated to a strange but pleasant way of life. All day he sat on a shelf in the small room, dimly lit by the red glow of the computer screen and a weak string of Christmas lights. At night, the humans would come in to work, instantly transforming the place into a world of lights, noise, excitement, and chatter. Hugh soon learned that the humans were university students, part of a group that built space toys and occasionally launched them. At first he couldn't fathom why the students were so happy to stay up all night, buzzed on chocolate covered coffee beans, manufacturing their strange equipment, and chatting about the growing piles of papers and psets that they weren't going to complete. Hugh concluded that their school life must be so incredibly boring that the whine of a Dremel was some small consolation to them.<br /> <br /> Over the course of months, Hugh watched complicated balloon payload mechanisms take shape, larger and larger rockets growing from epoxy and phenolic, and a strange, quieter group that frequently came in to turn the lights off and spend long periods of time making minute adjustments to black foamcore pyramids, and getting unreasonably excited over flickers on the oscilloscope screen. It was a strange bunch, but Hugh began to grow quite fond of them.<br /> <br /> And the group of students very quickly grew very fond of Hugh. Almost immediately, he was given a large broad-brimmed straw hat, which Hugh thought quite flatteringly accented his jawline. They talked to him, often placing him on the tables to watch them work. Although his mother had written him off as a failure of her space dreams, Hugh soon found that the students' lofty visions were infectious: he too began to dream of space.<br /> <br /> Over several weeks, Hugh's high-altitude aspirations became insatiable. He ached to get outside of the small room, and was sorely disappointed each night, at around 3am, when the students finally went home to their beds, leaving him behind. One night, however, things changed. Instead of going home, the students of the rockets team began carrying their gear outside of the room, talking excitedly about some grand event that was to happen the next day. To his surprise, Hugh himself was transported out in the hallway, and plopped down next to a large rocket. In a flurry, the team whisked Hugh, with all of the gear, into the elevator and into the basement.<br /> <br /> ...now Hugh had watched his share of cheap horror films (usually while the students were at school, he'd sit on the keyboard and absorb Netflix from the computer), and he began to be worried about his relative helplessness in the situation. The students were transporting him, along with explosives and lots of tools, down a long dark hallway in the basement. They hurried through a pair of double doors and out onto a concrete block, lit orange by streetlights. Hugh's heart was beating fast now, certain that some dodgy business was about to go down, and concerned by his role in it. He was dropped on the edge of the concrete block. Peering over, he saw a 4 foot drop below him, and quickly shuffled back from the edge. Having just saved himself from imminent death by height, Hugh glanced up to see, to his horror, a huge black metal box with angry red lights advancing slowly towards him. A pipe poured steam from it's face and it growled hungrily. Hugh squeezed his eyes shut and tried to hide under his hat, waiting for the inevitable end.<br /> <br /> ...which didn't come. <br /> <br /> He popped one eye open. The box had stopped. One side of it split open, and Ian, one of the leaders of the rockets team, emerged from the side of it. Ian pulled at the bottom of the box, and the angry face of the metal machine, to Hugh's extreme surprise, slid up into the night air, to expose the fuzzy contours of upholstery. Hugh was nestled gently into a corner, with rocket components laid neatly all around him. When everything was packed into the space, the team wishes Hugh a goodnight and shut the face of the metal box.<br /> <br /> &quot;What a strange turn of events...&quot; Hugh mused. He didn't seem to be dead and dismembered, and in fact, his present situation was so cozy... Feeling, all of a sudden, the relief of stress and exhaustion, Hugh was all too happy to doze off into a comfortable sleep.<br /> <br /> ...to be continued<br /> <br /> <br /> [[Category: Satire]]</div>

Ehillstrom https://ssi-wiki.stanford.edu/w/index.php?title=Hugh_G._Mistake&diff=2008 2016-06-02T19:07:43Z

<p>Ehillstrom: </p> <hr /> <div>== Chapter 1: Hugh is Born ==<br /> <br /> Hugh was born one lonely night in a small room in the Durand building. His mother, Ms. Mistake, was a 3D printer who dreamed of space. She was working on printing a Saturn V model that fateful night, concentrating especially hard on making the layers consistent so it might have a chance at an aerodynamic glide when something perturbed her circuits and her software went haywire. She didn't remember a thing from that night, but rather awoke to find, not a Saturn V, but a tangled nest of black plastic filament. So disappointed in not having created her Saturn 5, Ms. Mistake wrote the large ball of black plastic off in disgust. She named him Hugh G. Mistake and left him to fumble in the dark.<br /> <br /> Lonely, blind, and disoriented in this strange new universe, Hugh cried softly to himself until he was exhausted and fell asleep. He was awoken by the sound of loud voices. Clearly human, they shouted, &quot;Oh no, we've made a HUGE MISTAKE.&quot; Recognizing his name, Hugh's ear filament perked up, and he shuffled around to face the source of the noise. Suddenly, Hugh felt large hands lifting him through space; he could feel the air rushing through him, a this vastly new and not quite pleasant experience. He was plopped down on a hard surface and second later, he felt a scorching heat on the front of his face, starting to melt him a little, even. No sooner had he begun to think about the potential damage to his nervous system, which he could feel softening, however, than he rose to new levels of shock for the morning: he could see! His mind was overloaded with sensory input: he was in a small room with bright lights, and at least 3 humans, one of whom was brandishing the source of the scorching heat: a plastic implement with a metal tip and plastic drooling from it. He could only assume this was some sort of torture or interrogation, but he had no idea what the humans wanted from him. The one with the hot gun brought it close to his face, and once again Hugh could feel his very filament beginning to melt, as another human brought a plastic eyeball near...<br /> <br /> Hugh was about ready to give up on being surprised for the morning. He could now see out of what he realized must be two plastic googly eyes that the humans had affixed to his face. The addition of this new and exciting sense was so mind-boggling that Hugh was tempted to write it off as a realm not bounded by logic. He didn't have long to appreciate this sense, however, because, as quickly as they had come, the humans stuffed him under a table, muttering something about &quot;Scaring the sh*t out of Elizabeth,&quot; turned off the lights, and left the room.<br /> <br /> Hugh was once again alone.<br /> <br /> <br /> <br /> <br /> ...to be continued<br /> <br /> <br /> [[Category: Satire]]</div>

Ehillstrom https://ssi-wiki.stanford.edu/w/index.php?title=Hugh_G._Mistake&diff=2007 2016-06-02T19:06:32Z

<p>Ehillstrom: /* Chapter 1: Hugh is Born */</p> <hr /> <div>== Chapter 1: Hugh is Born ==<br /> <br /> Hugh was born one lonely night in a small room in the Durand building. His mother, Ms. Mistake, was a 3D printer who dreamed of space. She was working on printing a Saturn V model that fateful night, concentrating especially hard on making the layers consistent so it might have a chance at an aerodynamic glide when something perturbed her circuits and her software went haywire. She didn't remember a thing from that night, but rather awoke to find, not a Saturn V, but a tangled nest of black plastic filament. So disappointed in not having created her Saturn 5, Ms. Mistake wrote the large ball of black plastic off in disgust. She named him Hugh G. Mistake and left him to fumble in the dark.<br /> <br /> Lonely, blind, and disoriented in this strange new universe, Hugh cried softly to himself until he was exhausted and fell asleep. He was awoken by the sound of loud voices. Clearly human, they shouted, &quot;Oh no, we've made a HUGE MISTAKE.&quot; Recognizing his name, Hugh's ear filament perked up, and he shuffled around to face the source of the noise. Suddenly, Hugh felt large hands lifting him through space; he could feel the air rushing through him in this vastly new experience. He was plopped down on a hard surface and second later, he felt a scorching heat on the front of his face, starting to melt him a little, even. No sooner had he begun to think about the potential damage to his nervous system, which he could feel softening, however, than he rose to new levels of shock for the morning: he could see! His mind was overloaded with sensory input: he was in a small room with bright lights, and at least 3 humans, one of whom was brandishing the source of the scorching heat: a plastic implement with a metal tip and plastic drooling from it. He could only assume this was some sort of torture or interrogation, but he had no idea what the humans wanted from him. The one with the hot gun brought it close to his face, and once again Hugh could feel his very filament beginning to melt, as another human brought a plastic eyeball near...<br /> <br /> Hugh was about ready to give up on being surprised for the morning. He could now see out of what he realized must be two plastic googly eyes that the humans had affixed to his face. The addition of this new and exciting sense was so mind-boggling that Hugh was tempted to write it off as a realm not bounded by logic. He didn't have long to appreciate this sense, however, because, as quickly as they had come, the humans stuffed him under a table, muttering something about &quot;Scaring the sh*t out of Elizabeth,&quot; turned off the lights, and left the room.<br /> <br /> Hugh was once again alone.<br /> <br /> <br /> <br /> <br /> ...to be continued<br /> <br /> <br /> [[Category: Satire]]</div>

Ehillstrom https://ssi-wiki.stanford.edu/w/index.php?title=Hugh_G._Mistake&diff=2006 2016-06-02T19:06:03Z

<p>Ehillstrom: Added origin story</p> <hr /> <div>== Chapter 1: Hugh is Born ==<br /> <br /> Hugh was born one lonely night in a small room in the Durand building. His mother, Ms. Mistake, is a 3D printer who dreamed of space. She was working on printing a Saturn V model that fateful night, concentrating especially hard on making the layers consistent so it might have a chance at an aerodynamic glide when something perturbed her circuits and her software went haywire. She didn't remember a thing from that night, but rather awoke to find, not a Saturn V, but a tangled nest of black plastic filament. So disappointed in not having created her Saturn 5, Ms. Mistake wrote the large ball of black plastic off in disgust. She named him Hugh G. Mistake and left him to fumble in the dark.<br /> <br /> Lonely, blind, and disoriented in this strange new universe, Hugh cried softly to himself until he was exhausted and fell asleep. He was awoken by the sound of loud voices. Clearly human, they shouted, &quot;Oh no, we've made a HUGE MISTAKE.&quot; Recognizing his name, Hugh's ear filament perked up, and he shuffled around to face the source of the noise. Suddenly, Hugh felt large hands lifting him through space; he could feel the air rushing through him in this vastly new experience. He was plopped down on a hard surface and second later, he felt a scorching heat on the front of his face, starting to melt him a little, even. No sooner had he begun to think about the potential damage to his nervous system, which he could feel softening, however, than he rose to new levels of shock for the morning: he could see! His mind was overloaded with sensory input: he was in a small room with bright lights, and at least 3 humans, one of whom was brandishing the source of the scorching heat: a plastic implement with a metal tip and plastic drooling from it. He could only assume this was some sort of torture or interrogation, but he had no idea what the humans wanted from him. The one with the hot gun brought it close to his face, and once again Hugh could feel his very filament beginning to melt, as another human brought a plastic eyeball near...<br /> <br /> Hugh was about ready to give up on being surprised for the morning. He could now see out of what he realized must be two plastic googly eyes that the humans had affixed to his face. The addition of this new and exciting sense was so mind-boggling that Hugh was tempted to write it off as a realm not bounded by logic. He didn't have long to appreciate this sense, however, because, as quickly as they had come, the humans stuffed him under a table, muttering something about &quot;Scaring the sh*t out of Elizabeth,&quot; turned off the lights, and left the room.<br /> <br /> Hugh was once again alone.<br /> <br /> <br /> <br /> <br /> ...to be continued<br /> <br /> <br /> [[Category: Satire]]</div>

Ehillstrom https://ssi-wiki.stanford.edu/w/index.php?title=List_of_Missions&diff=1982 2016-05-18T12:32:11Z

<p>Ehillstrom: added commas</p> <hr /> <div>This page contains a list of notable tests or launches which have been given mission status (denoted by a mission patch). The mission patch system was introduced in 2015.<br /> <br /> <br /> <br /> &lt;gallery widths=250px heights=250px&gt;<br /> |align=center<br /> File:Rsz 11ssi 19.png|&lt;center&gt; [[SSI-19]], Balloons Team, May 16th 2015 &lt;/center&gt;<br /> File:Rsz ssi-22.png |&lt;center&gt; [[SSI-22]], Balloons Team, May 31st 2015 &lt;/center&gt;<br /> File:SSI-1E4.png|&lt;center&gt; [[SSI-1E4]], Satellites Team, June 4, 2015 &lt;/center&gt;<br /> File:Ssi 23.png |&lt;center&gt; [[SSI-23]], Balloons Team, October 24th, 2015 &lt;/center&gt;<br /> File:Ssi 24.png |&lt;center&gt; [[SSI-24]], Balloons Team, October 24th, 2015 &lt;/center&gt;<br /> File:Ssi 25.png |&lt;center&gt; [[SSI-25]], Balloons Team, October 24th, 2015 &lt;/center&gt;<br /> File:SSI-R1.png|&lt;center&gt; SSI-R1, Rockets Team, February 6th, 2016 &lt;/center&gt;<br /> File:SSI-31.png|&lt;center&gt; [[SSI-31]], Balloons Team, February 13th, 2016 &lt;/center&gt;<br /> File:STAR-CROSSD.png|&lt;center&gt; [[STAR-CROSSD]], Satellites Team, May, 2016 &lt;/center&gt;<br /> &lt;/gallery&gt;</div>

Ehillstrom https://ssi-wiki.stanford.edu/w/index.php?title=STAR-CROSSD&diff=1981 2016-05-18T12:29:14Z

<p>Ehillstrom: Created page with &quot;{{satellites-stub}} Category: Satellites&quot;</p> <hr /> <div>{{satellites-stub}}<br /> <br /> [[Category: Satellites]]</div>

Ehillstrom https://ssi-wiki.stanford.edu/w/index.php?title=File:STAR-CROSSD.png&diff=1980 2016-05-18T12:26:52Z

<p>Ehillstrom: Ehillstrom uploaded a new version of File:STAR-CROSSD.png</p> <hr /> <div></div>

Ehillstrom https://ssi-wiki.stanford.edu/w/index.php?title=File:STAR-CROSSD.png&diff=1979 2016-05-18T12:24:36Z

<p>Ehillstrom: </p> <hr /> <div></div>

Ehillstrom https://ssi-wiki.stanford.edu/w/index.php?title=List_of_Missions&diff=1978 2016-05-18T12:23:40Z

<p>Ehillstrom: Added STAR-CROSSD</p> <hr /> <div>This page contains a list of notable tests or launches which have been given mission status (denoted by a mission patch). The mission patch system was introduced in 2015.<br /> <br /> <br /> <br /> &lt;gallery widths=250px heights=250px&gt;<br /> |align=center<br /> File:Rsz 11ssi 19.png|&lt;center&gt; [[SSI-19]], Balloons Team, May 16th 2015 &lt;/center&gt;<br /> File:Rsz ssi-22.png |&lt;center&gt; [[SSI-22]], Balloons Team, May 31st 2015 &lt;/center&gt;<br /> File:SSI-1E4.png|&lt;center&gt; [[SSI-1E4]], Satellites Team, June 4, 2015 &lt;/center&gt;<br /> File:Ssi 23.png |&lt;center&gt; [[SSI-23]], Balloons Team, October 24th, 2015 &lt;/center&gt;<br /> File:Ssi 24.png |&lt;center&gt; [[SSI-24]], Balloons Team, October 24th, 2015 &lt;/center&gt;<br /> File:Ssi 25.png |&lt;center&gt; [[SSI-25]], Balloons Team, October 24th, 2015 &lt;/center&gt;<br /> File:SSI-R1.png|&lt;center&gt; SSI-R1 Rockets Team, February 6th, 2016 &lt;/center&gt;<br /> File:SSI-31.png|&lt;center&gt; [[SSI-31]] Balloons Team, February 13th, 2016 &lt;/center&gt;<br /> File:STAR-CROSSD.png|&lt;center&gt; [[STAR-CROSSD]] Satellites Team, May, 2016 &lt;/center&gt;<br /> &lt;/gallery&gt;</div>

Ehillstrom https://ssi-wiki.stanford.edu/w/index.php?title=Optical_fine_steering_for_CubeSats&diff=1936 2016-04-19T02:03:55Z

<p>Ehillstrom: wrote half of high-level summary</p> <hr /> <div>[[Precision Aiming| Precision aiming]] is one of the greatest challenges of Optical Communications, due to the tight beam divergence required to deliver appreciable amounts of power to a distant target. The steering that an average [[Attitude Determination and Control (ADCS) | ADCS]] system can offer for a CubeSat is on the order of ~3 degrees of accuracy, with finer pointing available on the market, but at increased cost and lower applicability to CubeSats. Because of this, for Optical Communications from CubeSat platforms, it becomes necessary to introduce a fine steering system for the transmitter itself, to improve on the pointing precision of bulk movements of the satellite body.<br /> <br /> ==Design Constraints==<br /> One of the key criteria for selecting a fine steering system is angular precision. One rule of thumb for the pointing accuracy required from a fine steering system is 1/10th of the [[Beam Divergence | beam divergence]] angle. For instance for a 2.1 mrad beam divergence, the level of accuracy of the fine steering system would need to be ±210 μrad, significantly finer than a typical CubeSat ADCS can offer.<br /> <br /> The speed with which a fine steering system can dynamically adjust is also an important consideration. This is directly impacted by the satellite's orbit. Because most CubeSats operate in orbits at approximately 400 to 700km of altitude, the time they pass over any ground station is on the order of minutes. Therefore a useful optical communications system needs to be able to acquire a link in approximately one minute or less. The angular velocity of the pass also dictates that the aiming system (the combination of the ADCS and a fine steering system) needs to be able to handle a slew rate of ~1 degree/second.<br /> <br /> ==Fine Steering Mirrors==<br /> The most common approach to creating a fine steering system precise enough to control the beam to level of precision required is to use a fine steering mirror. The alternative is to slew the whole transmitter, but this is not widely used for CubeSat optical communications. The two main options for fine steering control are [[https://en.wikipedia.org/wiki/Piezoelectricity piezoelectric]] devices, and [[https://en.wikipedia.org/wiki/Microelectromechanical_systems MEMS]] mirrors.<br /> <br /> <br /> [[Category:Optical Communications]]</div>

Ehillstrom https://ssi-wiki.stanford.edu/w/index.php?title=The_Field_of_Optical_Communications&diff=1871 2016-04-05T03:59:26Z

<p>Ehillstrom: Added header</p> <hr /> <div>What follows is a high level overview of notable milestones in the development of space-based optical communications.<br /> <br /> == MIT Lincoln Labs LLCD/LADEE ==<br /> Nasa's Lunar Laser Communication Demonstration (LLCD) was a rousing success that demonstrated duplex laser communications at previously unheard-of speeds between lunar orbit and ground stations on Earth (These download speeds were at times faster than the ground lines on Earth when distributing downloaded scientific data). The LLCD's space component was attached as an optical payload to the larger scientific satellite LADEE.<br /> The LLCD project operated on the 1.5-micron band with maximum downlink speeds of 622Mbs. The project featured a 1kHz squarewave acquisition signal and could measure its round-trip Time of Flight (TOF) to within 200 psec.<br /> <br /> All systems operated at or above expected levels, and it was demonstrated that an optical link could be established without human-in-the-loop interaction. Several demonstrations of the system were executed, and are described below.<br /> [[File:LADEE w flare - cropped.jpg |475px|right]]<br /> <br /> ==== High Speed Telemetry ====<br /> The typical 50kbps telecommunications via RF were replaced during a lock-on window by a 2.7Mbps optical telemetry transmission. This information was then plotted graphically in real time against the slower RF data. <br /> <br /> ==== High Volume Download ====<br /> During one experiment, test data from another LADEE experiment was transmitted via the optical link. The 1GB of data was transmitted in under five minutes (error-free). The same amount of data would have consumed every RF window for three days to transmit.<br /> <br /> The information was then relayed to scientist on the ground using existing infrastructure that was often slower than the optical link itself. This process was executed several times at the request of LADEE scientists and gave them an unprecedented amount of data to process.<br /> <br /> ==== Webcam Livestream ====<br /> An HD webcam was setup in the operations center and broadcast its information up and around the moon before coming back. Viewers would see their movements about seven seconds delayed on the big screen. &quot;Needless to say, this was a very popular feature of the demonstration&quot; [http://proceedings.spiedigitallibrary.org/proceeding.aspx?articleid=1841892].<br /> <br /> ==== Ground Station Handover ====<br /> During testing with the LLGT, cloud cover became stronger than anticipated. With very little time delay, the link was turned off, locked onto the LLOT (one of the back-up stations), and then reactivated perfectly. This was the first demonstration of a control &quot;Handover&quot; and showed the systems robustness. <br /> <br /> ==== Open-Loop Optical Lock On ====<br /> After lock on had become routine, LADEE was loaded with predefined instructions to turn on the LLST system. Then when LADEE next came into view, without any RF communication, the LLST system was activated and locked on to the ground.The entire transmission window was then operated entirely upon optical commands, and RF was never used.<br /> <br /> === The Ground and Space terminals (LLGT and LLST) ===<br /> The Lunar Lasercom Space Terminal (LLST) optics consisted of a 10cm reflective telescope capable of ~15uRad beam width. It was connected via fiber to the modem where transmissions up to .5W were processed. This module was used for uplinks as well. LADEE was the host satellite to this experiment, and LLST's optics were gimballed on a side-mount of the satellite. <br /> <br /> The ground stations for the LLCD project consisted of the primary Lunar Lasercom Ground Terminal (LLGT), and the two backup terminals, the Lunar Lasercom OCTL Terminal (LLOT) and the Lunar Lasercom Optical Ground System (LLOGS).<br /> <br /> ==== LLGT ====<br /> The LLGT contained four 15cm 10W transmit telescopes and four 40cm Downlink telescopes. Its downlink telescopes were linked by fiber to an array of superconducting nanowire single photon detectors. All eight of these telescopes were then contained within an environmentally controlled enclosure. The entire LLGT device was transportable, and was thoroughly tested near MIT Lincoln Labs before being transported to White Sands where it stayed for the tests.<br /> <br /> ==== LLOT ====<br /> The LLOT is a 60W transmitter with six uplink apertures. The downlink receiver utilizes a super conducting nanowire photon counting array and exhibits 78Mbits downlink with tracking and uplink acquisition abilities. <br /> <br /> ==== LLOGS ====<br /> Based upon the earlier OGS, the LLOGS was LLCD's third backup solution. Created with a 1 meter downlink telescope, with 3 outrigger telescopes for uplinking and acquisition, this 60W transmitter and receiver is most similar to SSI's optical communications modules. It uses hardware post processing to downlink at 39Mbs, and a photo-multiplier tube array as its primary sensor.<br /> <br /> ==JPL 1U Optical Comms Terminal==<br /> {{:JPL 1U Optical Communications Terminal}}<br /> <br /> ==NASA Small Satellites Technology Project==<br /> {{satellite<br /> | header = OCSD-1 (AeroCube 7A)<br /> | img link = File:OCSD1.jpg<br /> | organization = NASA, The Aerospace Corporation<br /> | launch provider = [https://en.wikipedia.org/wiki/United_Launch_Alliance ULA] - Atlas V<br /> | launch date = October 8, 2015<br /> | launch site = [https://en.wikipedia.org/wiki/Vandenberg_Air_Force_Base Vandenberg AFB]<br /> | orbit = LEO 1000 x 1200 km x 63.4&amp;deg;<br /> | size = 1.5U<br /> }} {{satellite<br /> | header = OCSD-2 (AeroCube 7B/C)<br /> | img link = File:OCSD2.jpg<br /> | organization = NASA, The Aerospace Corporation<br /> | launch provider = [https://en.wikipedia.org/wiki/SpaceX SpaceX] - Falcon 9<br /> | launch date = July 2016 (projected)<br /> | launch site = [https://en.wikipedia.org/wiki/Vandenberg_Air_Force_Base Vandenberg AFB]<br /> | orbit = Unknown<br /> | size = 2 x 1.5U<br /> }}<br /> The Small Spacecraft Technology Program invests in the development and demonstration of a range of technologies and capabilities and engages the talents of a broad community of researchers and technologists from government, industry and academia. Currently, the SSTP funds and/or manages 34 projects that are organized under the four program elements. Of these, two pertain to optical communications.<br /> ===Optical Communications and Sensor Demonstration (OCSD)===<br /> <br /> The Optical Communications and Sensor Demonstration (OCSD) project, managed by NASA with payloads built by The Aerospace Corporation, addresses two cross-cutting capabilities of value to many future small spacecraft missions: high-speed optical transmission of data and small spacecraft proximity operations. Optical data rates demonstrated by OCSD are expected to be 200 megabits per second (Mb/s) or higher, a factor of 100 increase over current high-end CubeSat communications systems. [http://www.nasa.gov/sites/default/files/atoms/files/ocsd_fact_sheet_21oct2015.pdf]<br /> <br /> The optical communications system on OCSD differs from other space-based laser communication systems because the laser is hard-mounted to the spacecraft body. The beam is pointed by controlling the orientation of the entire spacecraft. This makes the laser system much more compact than anything previously flown in space. The attitude control system developed for these satellites includes a pair of miniature star trackers, devices that measure the position of stars for navigational purposes. These star trackers were designed to enable pointing to an accuracy of 0.05 degrees, which is 20 times the precision previously demonstrated in a satellite of this size. See [http://spaceflight101.com/atlas-v-nrol-55/ocsd-a/ here] for a detailed overview of the OCSD satellites' system specifications.<br /> <br /> ====OCSD-1====<br /> <br /> OCSD-1 was launched on October 8, 2015. OCSD-1 was the first of three planned satellites, carrying a 6W fiber laser with a 0.7&amp;deg; divergence half angle designed to downlink with a 30 cm ground telescope. This was later enlarged to 80 cm. [https://directory.eoportal.org/web/eoportal/satellite-missions/a/aerocube-ocsd] Projected data rates from OCSD-1 range from 5 to 100 Mbits/s. On October 30, 2015, NASA acknowledged that the Attitude Determination and Control System ([https://en.wikipedia.org/wiki/Attitude_control ADCS]) onboard the satellite was not functioning properly, preventing a test of the satellite's optical communications systems.[http://www.nasa.gov/feature/ocsd] OCSD-1 does not contain any fine beam steering systems, relying wholly on the ADCS for optical alignment. The stated minimum ADCS precision for basic link function is 0.15&amp;deg;; NASA and The Aerospace Corporation have claimed the optical link could achieve data rates above 1 Gbit/s with an higher precision ADCS.<br /> <br /> ====OCSD-2 (A/B)====<br /> <br /> OCSD-2 is scheduled for launch during 2016 aboard a currently unidentified Falcon 9 launch from Vandenberg AFB. The first such launch is currently scheduled for July. OCSD-2 contains the remaining two of the three planned satellites, which will launch as a single 3U unit and separate into 2 independent satellites. The OCSD-2 A and B payloads will attempt satellite-earth and satellite-satellite communications at speeds in excess of 500 Mbit/s, with the primary purpose of demonstrating technologies for satellites operating in proximity to each other. It is unclear what systems will differ between the OCSD-1 and OCSD-2 payloads.<br /> <br /> ===Space Optical Communications Using Laser Beam Amplification (SOCLBA)===<br /> <br /> The Space Optical Communications Using Laser Beam Amplification (SOCLBA) project will provide a capability to amplify a laser beam that is received in a modulating retro-reflector (MRR) located in a satellite in low Earth orbit. The results of the first year’s work (2014) show amplification factors of 60 times the power of the signal beam. However, there has been little published information since then. The program is led by researchers at the University of Rochester.<br /> <br /> [[Category: Satellites]] [[Category: Optical Communications]]</div>

Ehillstrom https://ssi-wiki.stanford.edu/w/index.php?title=How_to_Join_SSI&diff=1819 2016-03-29T02:44:52Z

<p>Ehillstrom: Added links</p> <hr /> <div>Hello! There are a few things you need to do if you'd like to have full access to SSI's resources as a member.<br /> <br /> # Fill out [http://goo.gl/forms/oNtfIehEpN this form] so we can add you to our official roster.<br /> # In order to allow you access to our workspace, Mission Control, you need to do the following things:<br /> ##Go to AXESS and click &quot;STARS&quot; at the top<br /> ##Using either the &quot;All Learning&quot; list, or the Search Catalog, complete the following three safety trainings: '''EHS-4200: General Safety, Injury Prevention (IIPP), and Emergency Preparedness, EHS-1900: Chemical Safety for Laboratories, and EHS-2200: Compressed Gas Safety.'''<br /> ##Some time after completion, you will receive an email for each of these (can take up to 24 hours) certifying your completion. Save each e-mail as a PDF, or, less preferably, screenshot it. This PDF or screenshot '''must''' have your name on it.<br /> ##Create a folder on the [https://drive.google.com/folderview?id=0B7R_UB6uk1UAdWVLM1pURWxyMDA&amp;usp=drive_web SSI Google Drive] with your full name, and, inside of it, upload PDF's or screenshots proving your completion of the safety trainings.</div>

Ehillstrom https://ssi-wiki.stanford.edu/w/index.php?title=The_Field_of_Optical_Communications&diff=1603 2016-03-13T07:51:13Z

<p>Ehillstrom: Created page</p> <hr /> <div>{{satellites-stub}}</div>

Ehillstrom https://ssi-wiki.stanford.edu/w/index.php?title=List_of_Missions&diff=1393 2016-02-10T15:40:00Z

<p>Ehillstrom: Added Ivy patch</p> <hr /> <div>This page contains a list of notable tests or launches which have been given mission status (denoted by a mission patch). The mission patch system was introduced in 2015.<br /> <br /> <br /> <br /> &lt;gallery widths=250px heights=250px&gt;<br /> |align=center<br /> File:Rsz 11ssi 19.png|&lt;center&gt; [[SSI-19]], Balloons Team, May 16th 2015 &lt;/center&gt;<br /> File:Rsz ssi-22.png |&lt;center&gt; [[SSI-22]], Balloons Team, May 31st 2015 &lt;/center&gt;<br /> File:SSI-1E4.png|&lt;center&gt; [[SSI-1E4]], OpComms Team, June 4, 2015 &lt;/center&gt;<br /> File:Ssi 23.png |&lt;center&gt; [[SSI-23]], Balloons Team, October 24th, 2015 &lt;/center&gt;<br /> File:Ssi 24.png |&lt;center&gt; [[SSI-24]], Balloons Team, October 24th, 2015 &lt;/center&gt;<br /> File:Ssi 25.png |&lt;center&gt; [[SSI-25]], Balloons Team, October 24th, 2015 &lt;/center&gt;<br /> File:SSI-31.png|&lt;center&gt; [[SSI-31|SSI-31]] Balloons Team, February 13th, 2016 &lt;/center&gt;<br /> &lt;/gallery&gt;</div>

Ehillstrom https://ssi-wiki.stanford.edu/w/index.php?title=List_of_Missions&diff=1392 2016-02-10T15:36:37Z

<p>Ehillstrom: </p> <hr /> <div>This page contains a list of notable tests or launches which have been given mission status (denoted by a mission patch). The mission patch system was introduced in 2015.<br /> <br /> <br /> <br /> &lt;gallery widths=250px heights=250px&gt;<br /> |align=center<br /> File:Rsz 11ssi 19.png|&lt;center&gt; [[SSI-19]], Balloons Team, May 16th 2015 &lt;/center&gt;<br /> File:Rsz ssi-22.png |&lt;center&gt; [[SSI-22]], Balloons Team, May 31st 2015 &lt;/center&gt;<br /> File:SSI-1E4.png|&lt;center&gt; [[SSI-1E4]], OpComms Team, June 4, 2015 &lt;/center&gt;<br /> File:Ssi 23.png |&lt;center&gt; [[SSI-23]], Balloons Team, October 24th, 2015 &lt;/center&gt;<br /> File:Ssi 24.png |&lt;center&gt; [[SSI-24]], Balloons Team, October 24th, 2015 &lt;/center&gt;<br /> File:Ssi 25.png |&lt;center&gt; [[SSI-25]], Balloons Team, October 24th, 2015 &lt;/center&gt;<br /> File:SSI-ivy.png|&lt;center&gt; [[SSI-Ivy]] Balloons Team, February 13th, 2016 &lt;/center&gt;<br /> &lt;/gallery&gt;</div>

Ehillstrom https://ssi-wiki.stanford.edu/w/index.php?title=Template:Opcomms-sidebar&diff=1324 2016-02-06T20:31:46Z

<p>Ehillstrom: Added test procedure</p> <hr /> <div>{| class=&quot;wikitable&quot; style=&quot;float:right; margin-left: 10px; font-size:85%;max-width:250px; text-align:center&quot;<br /> {{red-header|size=150}}Optical Communications<br /> |-<br /> | Part of the [[Optical Communications Team | Optical Communications]] series<br /> |-<br /> {{red-header}} Team Goals<br /> |- <br /> | [[Amateur Optical Communication Record]] &amp;bull; [[CubeQuest Challenge]]<br /> |-<br /> {{red-header}} Equipment<br /> |- <br /> | [[OpComms System I]] &amp;bull; [[OpComms System II|System II]] &amp;bull; [[OpComms System III|System III]] &amp;bull; [[OpComms System IV|System IV]] &amp;bull; [[3 cm Board]]<br /> |-<br /> {{red-header}} Noteworthy Tests<br /> |-<br /> | [[SSI-1E4]] &amp;bull; [[OpComms Test Procedure|Test Procedure]]<br /> |-<br /> {{red-header}} Important Concepts<br /> |-<br /> | [[Beam Divergence]] &amp;bull; [[Pulse Position Modulation]] &amp;bull; [[Scintillation]] &amp;bull; [[Precision Aiming]] &amp;bull; [[Fog]] &amp;bull; [[Long Range RF]] &amp;bull; [[Optical Internet Backhaul]] &amp;bull; [[Signal-to-Noise Ratio]]<br /> |-<br /> {{red-header}} Field Test Locations<br /> |-<br /> | [[W6YX]] (also see [[Amateur Radio]]) &amp;bull; [[Skyline Boulevard Overlook]] &amp;bull; [[Proposed Alternate OpComms Test Sites]]<br /> |-<br /> {{red-header}} People<br /> |-<br /> | [[Dr. Simone D'Amico|Dr. Simone D'Amico (Team Advisor)]] &amp;bull; [[User:Ehillstrom|Elizabeth Hillstrom (Co-Lead)]] &amp;bull; [[User:Smaldonado|Sasha Maldonado (Co-Lead)]] &amp;bull; [[Dr. Joseph Kahn]] &amp;bull; [[Dr. Leo Hollberg]]<br /> |-<br /> {{red-header}} Optical Communications Satellites<br /> |-<br /> | [[FitSat-1]] &amp;bull; [[LADEE]] &amp;bull; [[ARTEMIS and SPOT-4]] &amp;bull; [[OICETS]] &amp;bull; [[OPALS]] &amp;bull; [[JPL 1U Optical Communications Terminal]]<br /> |-<br /> {{red-header}} Astronomy<br /> |-<br /> | [[Las Cumbres Observatory Global Telescope Network]] &amp;bull; [[Stanford Astronomy Club]] &amp;bull; [[Stanford Student Observatory]]<br /> |-<br /> {{red-header}} Miscellaneous<br /> |-<br /> | [[Tactical Cinderblock]]<br /> |-<br /> {{red-header|textalign=right}} &lt;span class=&quot;plainlinks&quot; style = &quot;text-align: right&quot;&gt; [[Template:Opcomms-sidebar | V]] &amp;bull; [http://wiki.stanfordssi.org/index.php?title=Template:Opcomms-sidebar&amp;action=edit E] &lt;/span&gt;<br /> |}</div>

Ehillstrom https://ssi-wiki.stanford.edu/w/index.php?title=OpComms_Test_Procedure&diff=1323 2016-02-06T20:27:50Z

<p>Ehillstrom: Added pre-conditions</p> <hr /> <div>What follows is a complete set of instructions for completing a long-distance test (of any length) with the current [[Optical Communications]] transmitter/receiver node system.<br /> <br /> == Decide to Test ==<br /> '''Step 1:''' Check the weather for the two test sites and make a fog prediction. Using the [http://aprs.fi/#!lat=37.41780&amp;lng=-122.17200| Automated Packet Reporting System] check station KG6UWN for fog-forming factors upwind of Skyline: temperature and dew point within 5 degrees of each other, high humidity, and unfavorable wind direction (i.e. towards Skyline). Also check station EW4825 for the current conditions close to Skyline. &lt;br&gt;<br /> ''Optional: Check for [https://www.aviationweather.gov/| METAR] reports at local airports: KHAF, KMRY, KSNS, and KWVI.''&lt;br&gt;<br /> '''Step 2:''' If Step 1 returns favorable results, book two Zipcars for an appropriate time window. Testing will usually run from 7pm until midnight, but allow room for a later return as you likely will not have cell reception at Skyline.<br /> <br /> == Get Organized ==<br /> Before heading out to test, ensure that you have the following pieces of equipment: &lt;br&gt;<br /> 1) '''Transmit/receive [[OpComms System IV|node]].''' Ensure that the laser, photodetector, control board, and BNC connection between sensor and board are all present. &lt;br&gt;<br /> 2) '''Tripod.''' Make sure the tripod matches the node you have chosen. The Rosencrantz tripod has a round plate with a hole in the center; the Guildenstern tripod has a large tri-lobed plate that is continuous. &lt;br&gt;<br /> 3) '''Laptop.''' Ensure your code is up to date by pulling from the opcomms and opcomms-embedded Github repositories. &lt;br&gt;<br /> 4) '''Keysight oscilloscope.''' Have Sasha or Elizabeth unlock an oscilloscope from the toolbox. Guard it with your life. &lt;br&gt;<br /> 5) '''Test bin.''' Must contain toolbox, extension cords, power supplies, and motorized alt/az mount. Use a dry-erase marker to complete the Test Checklist posted on the lid of the bin. If all of the contents are present you may proceed &lt;br&gt;<br /> 6) '''Radios.''' Each group will need one Baofeng transceiver, to be used by a licensed amateur radio operator. These radios live on the left side of the shelves above the EE workbench in MC and should be on their chargers when not in use. Tune both radios to a quiet radio frequency (good range: 445.000-447.000, try 446.200) and test communications down the hallway. While driving to your test locations, remember to periodically check in with the other group to confirm that the connection is good.<br /> 6) '''Headlamps.''' If you're testing over 10km ([[Skyline Boulevard Overlook|Skyline Boulevard]] and [[W6YX]]), you'll need a headlamp or flashlight for each group. There are 2 flashlights that live on the side of the toolchest in MC.<br /> <br /> == Set Up ==<br /> '''Step 1:''' Set up tripod on a piece of level ground. Attempt to identify the approximate location of the communicating node and ensure you have a clear line of sight in that direction. &lt;br&gt;<br /> '''Step 2:''' Find a source of AC power and run an extension cord to your test site. Verify you have at least 2 outlets available, using a power strip if necessary. &lt;br&gt;<br /> '''Step 3:''' Attach motorized alt/az mount. Use the attached mounting hardware to screw through the tripod plate and into the bottom of the mount. Ensure that the mount is solidly attached. If you are using the Guildenstern tripod, make sure that all three feet on the base of the mount are in contact with the surface of the tripod plate (if not, rotate). &lt;br&gt;<br /> '''Step 4:''' Find the leather battery purse and plug it into the mount. Verify that all batteries (AA) are present and replace if missing. Hang or support the purse somewhere on the tripod.<br /> '''Step 5:''' Attach the transmit/receive node to the mount by sliding the black plastic adapter on the node into the mount's slot. Make sure that the angled and flat faces are oriented correctly and that the adapter block slides fully into the slot. Tighten the set screw on the mount, ensuring a firm connection (although do not overtighten, as the screw is bearing on plastic). &lt;br&gt;<br /> '''Step 6:''' Find the modular cable (phone jack) in the yellow toolbox and connect it between the mount and the control board. &lt;br&gt;<br /> '''Step 7:''' Find the photodetector's power supply in the test bin (2 parts: one large block that plugs into AC + one 3-pin cable that connects to the block). Plug one side into AC. Plug the other side into the unoccupied port on the sensor, by first aligning the pins, pressing firmly, and screwing down the retaining collar. Make sure the switch on the power supply block is switched on, and verify that the sensor has power (check for green light between power and BNC ports on the top face of the sensor). &lt;br&gt;<br /> '''Step 8:''' Set up and plug in the Keysight oscilloscope. The power cable can be found in the side pouch inside the main compartment of the Keysight case. Toggle the power switch to start the boot sequence. Find the BNC cable in the yellow toolbox and connect the downward-facing BNC port on the control board to Source 1 on the oscilloscope. Adjust the vertical scaling to 20mV/division and the horizontal scaling to 10us/division. &lt;br&gt;<br /> '''Step 9:''' Find the microUSB cable in the yellow toolbox and connect the control board to a USB port on your computer. Open Arduino and connect to the board (Teensy 3.1), ensuring that a serial port appears in the Tools menu. Upload the code to the board and open the serial monitor when this is complete. &lt;br&gt;<br /> '''Step 10:''' Remove the lens cap from the node and ensure that the switch cover on the laser is flipped such that the button is continuously depressed. &lt;br&gt;<br /> '''Step 11:''' Straighten up the area. Close the toolbox and store it in the test bin. Place the test bin and oscilloscope case underneath of the tripod. &lt;br&gt;<br /> &lt;br&gt;<br /> ''You're done! Let's test!''<br /> <br /> ==Test==<br /> <br /> ==Pack Up==<br /> In general, store cables wrapped and secured with twist ties. Any component with a labeled place in the toolbox should return there.<br /> <br /> '''Step 1:''' Place the lens cap on the transmit/receive node and ensure the clips lock it into place. &lt;br&gt;<br /> '''Step 2:''' Turn off oscilloscope and unplug it. Pack the BNC Cable back into the yellow toolbox. Disconnect the power cable from the oscilloscope and pack it into the side pouch in the Keysight case. Snap the front cover onto the oscilloscope and zip it and the side pouch inside the carrying case. &lt;br&gt;<br /> '''Step 3:''' Disconnect your computer and store the MicroUSB cable in the yellow toolbox. &lt;br&gt;<br /> '''Step 4:''' Switch off and disconnect the photodetector's power supply. Store in the test bin. &lt;br&gt;<br /> '''Step 5:''' Disconnect the modular cable (phone jack) and store in the yellow toolbox. &lt;br&gt;<br /> '''Step 6:''' Disconnect the mount's battery purse and store in the test bin. &lt;br&gt;<br /> '''Step 7:''' Hold the transmit/receive node firmly and loosen the set screw to remove from the mount. Leave the sensor BNC cable and laser power wires connected. &lt;br&gt;<br /> '''Step 8:''' Unscrew the motorized mount from the tripod plate. Make sure to screw the mounting hardware back onto the bottom of the mount for storage. Store in the test bin. &lt;br&gt;<br /> '''Step 9:''' Collapse tripod. &lt;br&gt;<br /> '''Step 10:''' Check the area for forgotten components. Ensure you have the test bin (with toolbox), transmit/receive node, laptop, oscilloscope, and tripod. &lt;br&gt;<br /> &lt;br&gt;<br /> ''Head home. If you're driving back from Skyline Boulevard, you probably want to stop at Secret Safeway and get some ice cream :)''<br /> <br /> == At Home ==<br /> '''Step 1:''' Store test bins, tripod, and transmit/receive nodes on the shelves above the EE benches in MC. &lt;br&gt;<br /> '''Step 2:''' Ask Sasha or Elizabeth to lock the oscilloscopes to the toolchest. &lt;br&gt;<br /> '''Step 3:''' Return radio transceivers to their chargers. &lt;br&gt;<br /> '''Step 4:''' Upload your photos and data to Google Drive, in a folder with today's date and the test location. <br /> <br /> You'll also probably want to debrief to interpret test results and figure out next steps. If the test was significant, write a blog post about it.<br /> <br /> [[Category:Optical Communications]]</div>

Ehillstrom https://ssi-wiki.stanford.edu/w/index.php?title=OpComms_Test_Procedure&diff=1322 2016-02-06T19:22:56Z

<p>Ehillstrom: </p> <hr /> <div>What follows is a complete set of instructions for completing a long-distance test (of any length) with the current [[Optical Communications]] transmitter/receiver node system.<br /> <br /> == What You'll Need ==<br /> Before heading out to test, ensure that you have the following pieces of equipment: &lt;br&gt;<br /> 1) '''Transmit/receive [[OpComms System IV|node]].''' Ensure that the laser, photodetector, control board, and BNC connection between sensor and board are all present. &lt;br&gt;<br /> 2) '''Tripod.''' Make sure the tripod matches the node you have chosen. The Rosencrantz tripod has a round plate with a hole in the center; the Guildenstern tripod has a large tri-lobed plate that is continuous. &lt;br&gt;<br /> 3) '''Laptop.''' Ensure your code is up to date by pulling from the opcomms and opcomms-embedded Github repositories. &lt;br&gt;<br /> 4) '''Keysight oscilloscope.''' Have Sasha or Elizabeth unlock an oscilloscope from the toolbox. Guard it with your life. &lt;br&gt;<br /> 5) '''Test bin.''' Must contain toolbox, extension cords, power supplies, and motorized alt/az mount. Use a dry-erase marker to complete the Test Checklist posted on the lid of the bin. If all of the contents are present you may proceed &lt;br&gt;<br /> <br /> == Set Up ==<br /> '''Step 1:''' Set up tripod on a piece of level ground. Attempt to identify the approximate location of the communicating node and ensure you have a clear line of sight in that direction. &lt;br&gt;<br /> '''Step 2:''' Find a source of AC power and run an extension cord to your test site. Verify you have at least 2 outlets available, using a power strip if necessary. &lt;br&gt;<br /> '''Step 3:''' Attach motorized alt/az mount. Use the attached mounting hardware to screw through the tripod plate and into the bottom of the mount. Ensure that the mount is solidly attached. If you are using the Guildenstern tripod, make sure that all three feet on the base of the mount are in contact with the surface of the tripod plate (if not, rotate). &lt;br&gt;<br /> '''Step 4:''' Find the leather battery purse and plug it into the mount. Verify that all batteries (AA) are present and replace if missing. Hang or support the purse somewhere on the tripod.<br /> '''Step 5:''' Attach the transmit/receive node to the mount by sliding the black plastic adapter on the node into the mount's slot. Make sure that the angled and flat faces are oriented correctly and that the adapter block slides fully into the slot. Tighten the set screw on the mount, ensuring a firm connection (although do not overtighten, as the screw is bearing on plastic). &lt;br&gt;<br /> '''Step 6:''' Find the modular cable (phone jack) in the yellow toolbox and connect it between the mount and the control board. &lt;br&gt;<br /> '''Step 7:''' Find the photodetector's power supply in the test bin (2 parts: one large block that plugs into AC + one 3-pin cable that connects to the block). Plug one side into AC. Plug the other side into the unoccupied port on the sensor, by first aligning the pins, pressing firmly, and screwing down the retaining collar. Make sure the switch on the power supply block is switched on, and verify that the sensor has power (check for green light between power and BNC ports on the top face of the sensor). &lt;br&gt;<br /> '''Step 8:''' Set up and plug in the Keysight oscilloscope. The power cable can be found in the side pouch inside the main compartment of the Keysight case. Toggle the power switch to start the boot sequence. Find the BNC cable in the yellow toolbox and connect the downward-facing BNC port on the control board to Source 1 on the oscilloscope. Adjust the vertical scaling to 20mV/division and the horizontal scaling to 10us/division. &lt;br&gt;<br /> '''Step 9:''' Find the microUSB cable in the yellow toolbox and connect the control board to a USB port on your computer. Open Arduino and connect to the board (Teensy 3.1), ensuring that a serial port appears in the Tools menu. Upload the code to the board and open the serial monitor when this is complete. &lt;br&gt;<br /> '''Step 10:''' Remove the lens cap from the node and ensure that the switch cover on the laser is flipped such that the button is continuously depressed. &lt;br&gt;<br /> '''Step 11:''' Straighten up the area. Close the toolbox and store it in the test bin. Place the test bin and oscilloscope case underneath of the tripod. &lt;br&gt;<br /> &lt;br&gt;<br /> ''You're done! Let's test!''<br /> <br /> ==Test==<br /> <br /> ==Pack Up==<br /> In general, store cables wrapped and secured with twist ties. Any component with a labeled place in the toolbox should return there.<br /> <br /> '''Step 1:''' Place the lens cap on the transmit/receive node and ensure the clips lock it into place. &lt;br&gt;<br /> '''Step 2:''' Turn off oscilloscope and unplug it. Pack the BNC Cable back into the yellow toolbox. Disconnect the power cable from the oscilloscope and pack it into the side pouch in the Keysight case. Snap the front cover onto the oscilloscope and zip it and the side pouch inside the carrying case. &lt;br&gt;<br /> '''Step 3:''' Disconnect your computer and store the MicroUSB cable in the yellow toolbox. &lt;br&gt;<br /> '''Step 4:''' Switch off and disconnect the photodetector's power supply. Store in the test bin. &lt;br&gt;<br /> '''Step 5:''' Disconnect the modular cable (phone jack) and store in the yellow toolbox. &lt;br&gt;<br /> '''Step 6:''' Disconnect the mount's battery purse and store in the test bin. &lt;br&gt;<br /> '''Step 7:''' Hold the transmit/receive node firmly and loosen the set screw to remove from the mount. Leave the sensor BNC cable and laser power wires connected. &lt;br&gt;<br /> '''Step 8:''' Unscrew the motorized mount from the tripod plate. Make sure to screw the mounting hardware back onto the bottom of the mount for storage. Store in the test bin. &lt;br&gt;<br /> '''Step 9:''' Collapse tripod. &lt;br&gt;<br /> '''Step 10:''' Check the area for forgotten components. Ensure you have the test bin (with toolbox), transmit/receive node, laptop, oscilloscope, and tripod. &lt;br&gt;<br /> &lt;br&gt;<br /> ''Head home. If you're driving back from Skyline Boulevard, you probably want to stop at Secret Safeway and get some ice cream :)''<br /> <br /> == Back Home ==<br /> Upload your photos and data to Google Drive, in a folder with today's date and the test location. You'll also probably want to debrief to interpret test results and figure out next steps. If the test was significant, write a blog post about it.<br /> <br /> [[Category:Optical Communications]]</div>

Ehillstrom https://ssi-wiki.stanford.edu/w/index.php?title=OpComms_Test_Procedure&diff=1321 2016-02-06T19:22:08Z

<p>Ehillstrom: Ehillstrom moved page Test Procedure to OpComms Test Procedure without leaving a redirect</p> <hr /> <div>What follows is a complete set of instructions for completing a long-distance test (of any length) with the current [[Optical Communications]] transmitter/receiver node system.<br /> <br /> == What You'll Need ==<br /> Before heading out to test, ensure that you have the following pieces of equipment: &lt;br&gt;<br /> 1) '''Transmit/receive [[OpComms System IV|node]].''' Ensure that the laser, photodetector, control board, and BNC connection between sensor and board are all present. &lt;br&gt;<br /> 2) '''Tripod.''' Make sure the tripod matches the node you have chosen. The Rosencrantz tripod has a round plate with a hole in the center; the Guildenstern tripod has a large tri-lobed plate that is continuous. &lt;br&gt;<br /> 3) '''Laptop.''' Ensure your code is up to date by pulling from the OpComms Github repository. &lt;br&gt;<br /> 4) '''Keysight oscilloscope.''' Have Sasha or Elizabeth unlock an oscilloscope from the toolbox. Guard it with your life. &lt;br&gt;<br /> 5) '''Test bin.''' Must contain toolbox, extension cords, power supplies, and motorized alt/az mount. Use a dry-erase marker to complete the Test Checklist posted on the lid of the bin. If all of the contents are present you may proceed &lt;br&gt;<br /> <br /> == Set Up ==<br /> '''Step 1:''' Set up tripod on a piece of level ground. Attempt to identify the approximate location of the communicating node and ensure you have a clear line of sight in that direction. &lt;br&gt;<br /> '''Step 2:''' Find a source of AC power and run an extension cord to your test site. Verify you have at least 2 outlets available, using a power strip if necessary. &lt;br&gt;<br /> '''Step 3:''' Attach motorized alt/az mount. Use the attached mounting hardware to screw through the tripod plate and into the bottom of the mount. Ensure that the mount is solidly attached. If you are using the Guildenstern tripod, make sure that all three feet on the base of the mount are in contact with the surface of the tripod plate (if not, rotate). &lt;br&gt;<br /> '''Step 4:''' Find the leather battery purse and plug it into the mount. Verify that all batteries (AA) are present and replace if missing. Hang or support the purse somewhere on the tripod.<br /> '''Step 5:''' Attach the transmit/receive node to the mount by sliding the black plastic adapter on the node into the mount's slot. Make sure that the angled and flat faces are oriented correctly and that the adapter block slides fully into the slot. Tighten the set screw on the mount, ensuring a firm connection (although do not overtighten, as the screw is bearing on plastic). &lt;br&gt;<br /> '''Step 6:''' Find the modular cable (phone jack) in the yellow toolbox and connect it between the mount and the control board. &lt;br&gt;<br /> '''Step 7:''' Find the photodetector's power supply in the test bin (2 parts: one large block that plugs into AC + one 3-pin cable that connects to the block). Plug one side into AC. Plug the other side into the unoccupied port on the sensor, by first aligning the pins, pressing firmly, and screwing down the retaining collar. Make sure the switch on the power supply block is switched on, and verify that the sensor has power (check for green light between power and BNC ports on the top face of the sensor). &lt;br&gt;<br /> '''Step 8:''' Set up and plug in the Keysight oscilloscope. The power cable can be found in the side pouch inside the main compartment of the Keysight case. Toggle the power switch to start the boot sequence. Find the BNC cable in the yellow toolbox and connect the downward-facing BNC port on the control board to Source 1 on the oscilloscope. Adjust the vertical scaling to 20mV/division and the horizontal scaling to 10us/division. &lt;br&gt;<br /> '''Step 9:''' Find the microUSB cable in the yellow toolbox and connect the control board to a USB port on your computer. Open Arduino and connect to the board (Teensy 3.1), ensuring that a serial port appears in the Tools menu. Upload the code to the board and open the serial monitor when this is complete. &lt;br&gt;<br /> '''Step 10:''' Remove the lens cap from the node and ensure that the switch cover on the laser is flipped such that the button is continuously depressed. &lt;br&gt;<br /> '''Step 11:''' Straighten up the area. Close the toolbox and store it in the test bin. Place the test bin and oscilloscope case underneath of the tripod. &lt;br&gt;<br /> &lt;br&gt;<br /> ''You're done! Let's test!''<br /> <br /> ==Test==<br /> <br /> ==Pack Up==<br /> In general, store cables wrapped and secured with twist ties. Any component with a labeled place in the toolbox should return there.<br /> <br /> '''Step 1:''' Place the lens cap on the transmit/receive node and ensure the clips lock it into place. &lt;br&gt;<br /> '''Step 2:''' Turn off oscilloscope and unplug it. Pack the BNC Cable back into the yellow toolbox. Disconnect the power cable from the oscilloscope and pack it into the side pouch in the Keysight case. Snap the front cover onto the oscilloscope and zip it and the side pouch inside the carrying case. &lt;br&gt;<br /> '''Step 3:''' Disconnect your computer and store the MicroUSB cable in the yellow toolbox. &lt;br&gt;<br /> '''Step 4:''' Switch off and disconnect the photodetector's power supply. Store in the test bin. &lt;br&gt;<br /> '''Step 5:''' Disconnect the modular cable (phone jack) and store in the yellow toolbox. &lt;br&gt;<br /> '''Step 6:''' Disconnect the mount's battery purse and store in the test bin. &lt;br&gt;<br /> '''Step 7:''' Hold the transmit/receive node firmly and loosen the set screw to remove from the mount. Leave the sensor BNC cable and laser power wires connected. &lt;br&gt;<br /> '''Step 8:''' Unscrew the motorized mount from the tripod plate. Make sure to screw the mounting hardware back onto the bottom of the mount for storage. Store in the test bin. &lt;br&gt;<br /> '''Step 9:''' Collapse tripod. &lt;br&gt;<br /> '''Step 10:''' Check the area for forgotten components. Ensure you have the test bin (with toolbox), transmit/receive node, laptop, oscilloscope, and tripod. &lt;br&gt;<br /> &lt;br&gt;<br /> ''Head home. If you're driving back from Skyline Boulevard, you probably want to stop at Secret Safeway and get some ice cream :)''<br /> <br /> == Back Home ==<br /> Upload your photos and data to Google Drive, in a folder with today's date and the test location. You'll also probably want to debrief to interpret test results and figure out next steps. If the test was significant, write a blog post about it.<br /> <br /> [[Category:Optical Communications]]</div>

Ehillstrom https://ssi-wiki.stanford.edu/w/index.php?title=OpComms_Test_Procedure&diff=1318 2016-02-05T21:08:21Z

<p>Ehillstrom: Added pack up procedure</p> <hr /> <div>What follows is a complete set of instructions for completing a long-distance test (of any length) with the current [[Optical Communications]] transmitter/receiver node system.<br /> <br /> == What You'll Need ==<br /> Before heading out to test, ensure that you have the following pieces of equipment: &lt;br&gt;<br /> 1) '''Transmit/receive [[OpComms System IV|node]].''' Ensure that the laser, photodetector, control board, and BNC connection between sensor and board are all present. &lt;br&gt;<br /> 2) '''Tripod.''' Make sure the tripod matches the node you have chosen. The Rosencrantz tripod has a round plate with a hole in the center; the Guildenstern tripod has a large tri-lobed plate that is continuous. &lt;br&gt;<br /> 3) '''Laptop.''' Ensure your code is up to date by pulling from the OpComms Github repository. &lt;br&gt;<br /> 4) '''Keysight oscilloscope.''' Have Sasha or Elizabeth unlock an oscilloscope from the toolbox. Guard it with your life. &lt;br&gt;<br /> 5) '''Test bin.''' Must contain toolbox, extension cords, power supplies, and motorized alt/az mount. Use a dry-erase marker to complete the Test Checklist posted on the lid of the bin. If all of the contents are present you may proceed &lt;br&gt;<br /> <br /> == Set Up ==<br /> '''Step 1:''' Set up tripod on a piece of level ground. Attempt to identify the approximate location of the communicating node and ensure you have a clear line of sight in that direction. &lt;br&gt;<br /> '''Step 2:''' Find a source of AC power and run an extension cord to your test site. Verify you have at least 2 outlets available, using a power strip if necessary. &lt;br&gt;<br /> '''Step 3:''' Attach motorized alt/az mount. Use the attached mounting hardware to screw through the tripod plate and into the bottom of the mount. Ensure that the mount is solidly attached. If you are using the Guildenstern tripod, make sure that all three feet on the base of the mount are in contact with the surface of the tripod plate (if not, rotate). &lt;br&gt;<br /> '''Step 4:''' Find the leather battery purse and plug it into the mount. Verify that all batteries (AA) are present and replace if missing. Hang or support the purse somewhere on the tripod.<br /> '''Step 5:''' Attach the transmit/receive node to the mount by sliding the black plastic adapter on the node into the mount's slot. Make sure that the angled and flat faces are oriented correctly and that the adapter block slides fully into the slot. Tighten the set screw on the mount, ensuring a firm connection (although do not overtighten, as the screw is bearing on plastic). &lt;br&gt;<br /> '''Step 6:''' Find the modular cable (phone jack) in the yellow toolbox and connect it between the mount and the control board. &lt;br&gt;<br /> '''Step 7:''' Find the photodetector's power supply in the test bin (2 parts: one large block that plugs into AC + one 3-pin cable that connects to the block). Plug one side into AC. Plug the other side into the unoccupied port on the sensor, by first aligning the pins, pressing firmly, and screwing down the retaining collar. Make sure the switch on the power supply block is switched on, and verify that the sensor has power (check for green light between power and BNC ports on the top face of the sensor). &lt;br&gt;<br /> '''Step 8:''' Set up and plug in the Keysight oscilloscope. The power cable can be found in the side pouch inside the main compartment of the Keysight case. Toggle the power switch to start the boot sequence. Find the BNC cable in the yellow toolbox and connect the downward-facing BNC port on the control board to Source 1 on the oscilloscope. Adjust the vertical scaling to 20mV/division and the horizontal scaling to 10us/division. &lt;br&gt;<br /> '''Step 9:''' Find the microUSB cable in the yellow toolbox and connect the control board to a USB port on your computer. Open Arduino and connect to the board (Teensy 3.1), ensuring that a serial port appears in the Tools menu. Upload the code to the board and open the serial monitor when this is complete. &lt;br&gt;<br /> '''Step 10:''' Remove the lens cap from the node and ensure that the switch cover on the laser is flipped such that the button is continuously depressed. &lt;br&gt;<br /> '''Step 11:''' Straighten up the area. Close the toolbox and store it in the test bin. Place the test bin and oscilloscope case underneath of the tripod. &lt;br&gt;<br /> &lt;br&gt;<br /> ''You're done! Let's test!''<br /> <br /> ==Test==<br /> <br /> ==Pack Up==<br /> In general, store cables wrapped and secured with twist ties. Any component with a labeled place in the toolbox should return there.<br /> <br /> '''Step 1:''' Place the lens cap on the transmit/receive node and ensure the clips lock it into place. &lt;br&gt;<br /> '''Step 2:''' Turn off oscilloscope and unplug it. Pack the BNC Cable back into the yellow toolbox. Disconnect the power cable from the oscilloscope and pack it into the side pouch in the Keysight case. Snap the front cover onto the oscilloscope and zip it and the side pouch inside the carrying case. &lt;br&gt;<br /> '''Step 3:''' Disconnect your computer and store the MicroUSB cable in the yellow toolbox. &lt;br&gt;<br /> '''Step 4:''' Switch off and disconnect the photodetector's power supply. Store in the test bin. &lt;br&gt;<br /> '''Step 5:''' Disconnect the modular cable (phone jack) and store in the yellow toolbox. &lt;br&gt;<br /> '''Step 6:''' Disconnect the mount's battery purse and store in the test bin. &lt;br&gt;<br /> '''Step 7:''' Hold the transmit/receive node firmly and loosen the set screw to remove from the mount. Leave the sensor BNC cable and laser power wires connected. &lt;br&gt;<br /> '''Step 8:''' Unscrew the motorized mount from the tripod plate. Make sure to screw the mounting hardware back onto the bottom of the mount for storage. Store in the test bin. &lt;br&gt;<br /> '''Step 9:''' Collapse tripod. &lt;br&gt;<br /> '''Step 10:''' Check the area for forgotten components. Ensure you have the test bin (with toolbox), transmit/receive node, laptop, oscilloscope, and tripod. &lt;br&gt;<br /> &lt;br&gt;<br /> ''Head home. If you're driving back from Skyline Boulevard, you probably want to stop at Secret Safeway and get some ice cream :)''<br /> <br /> == Back Home ==<br /> Upload your photos and data to Google Drive, in a folder with today's date and the test location. You'll also probably want to debrief to interpret test results and figure out next steps. If the test was significant, write a blog post about it.<br /> <br /> [[Category:Optical Communications]]</div>

Ehillstrom https://ssi-wiki.stanford.edu/w/index.php?title=How_do_I_OpComms%3F&diff=1317 2016-02-05T19:50:50Z

<p>Ehillstrom: created redirect</p> <hr /> <div>#REDIRECT [[Test Procedure]]</div>

Ehillstrom https://ssi-wiki.stanford.edu/w/index.php?title=OpComms_Test_Procedure&diff=1316 2016-02-05T19:49:44Z

<p>Ehillstrom: Added line return in What You&#039;ll Need section</p> <hr /> <div>What follows is a complete set of instructions for completing a long-distance test (of any length) with the current [[Optical Communications]] transmitter/receiver node system.<br /> <br /> == What You'll Need ==<br /> Before heading out to test, ensure that you have the following pieces of equipment: &lt;br&gt;<br /> 1) '''Transmit/receive [[OpComms System IV|node]].''' Ensure that the laser, photodetector, control board, and BNC connection between sensor and board are all present. &lt;br&gt;<br /> 2) '''Tripod.''' Make sure the tripod matches the node you have chosen. The Rosencrantz tripod has a round plate with a hole in the center; the Guildenstern tripod has a large tri-lobed plate that is continuous. &lt;br&gt;<br /> 3) '''Laptop.''' Ensure your code is up to date by pulling from the OpComms Github repository. &lt;br&gt;<br /> 4) '''Keysight oscilloscope.''' Have Sasha or Elizabeth unlock an oscilloscope from the toolbox. Guard it with your life. &lt;br&gt;<br /> 5) '''Test bin.''' Must contain toolbox, extension cords, power supplies, and motorized alt/az mount. Use a dry-erase marker to complete the Test Checklist posted on the lid of the bin. If all of the contents are present you may proceed &lt;br&gt;<br /> <br /> == Set Up ==<br /> '''Step 1:''' Set up tripod on a piece of level ground. Attempt to identify the approximate location of the communicating node and ensure you have a clear line of sight in that direction. &lt;br&gt;<br /> '''Step 2:''' Find a source of AC power and run an extension cord to your test site. Verify you have at least 2 outlets available, using a power strip if necessary. &lt;br&gt;<br /> '''Step 3:''' Attach motorized alt/az mount. Use the attached mounting hardware to screw through the tripod plate and into the bottom of the mount. Ensure that the mount is solidly attached. If you are using the Guildenstern tripod, make sure that all three feet on the base of the mount are in contact with the surface of the tripod plate (if not, rotate). &lt;br&gt;<br /> '''Step 4:''' Find the leather battery purse and plug it into the mount. Verify that all batteries (AA) are present and replace if missing. Hang or support the purse somewhere on the tripod.<br /> '''Step 5:''' Attach the transmit/receive node to the mount by sliding the black plastic adapter on the node into the mount's slot. Make sure that the angled and flat faces are oriented correctly and that the adapter block slides fully into the slot. Tighten the set screw on the mount, ensuring a firm connection (although do not overtighten, as the screw is bearing on plastic). &lt;br&gt;<br /> '''Step 6:''' Find the modular cable (phone jack) in the yellow toolbox and connect it between the mount and the control board. &lt;br&gt;<br /> '''Step 7:''' Find the photodetector's power supply in the test bin (2 parts: one large block that plugs into AC + one 3-pin cable that connects to the block). Plug one side into AC. Plug the other side into the unoccupied port on the sensor, by first aligning the pins, pressing firmly, and screwing down the retaining collar. Make sure the switch on the power supply block is switched on, and verify that the sensor has power (check for green light between power and BNC ports on the top face of the sensor). &lt;br&gt;<br /> '''Step 8:''' Set up and plug in the Keysight oscilloscope. Toggle the power switch to start the boot sequence. Find the BNC cable in the yellow toolbox and connect the downward-facing BNC port on the control board to Source 1 on the oscilloscope. Adjust the vertical scaling to 20mV/division and the horizontal scaling to 10us/division. &lt;br&gt;<br /> '''Step 9:''' Find the microUSB cable in the yellow toolbox and connect the control board to a USB port on your computer. Open Arduino and connect to the board (Teensy 3.1), ensuring that a serial port appears in the Tools menu. Upload the code to the board and open the serial monitor when this is complete. &lt;br&gt;<br /> '''Step 10:''' Remove the lens cap from the node and ensure that the switch cover on the laser is flipped such that the button is continuously depressed. &lt;br&gt;<br /> &lt;br&gt;<br /> You're done! Let's test!<br /> <br /> ==Test==<br /> <br /> ==Pack Up==<br /> <br /> [[Category:Optical Communications]]</div>

Ehillstrom https://ssi-wiki.stanford.edu/w/index.php?title=OpComms_Test_Procedure&diff=1315 2016-02-05T19:49:13Z

<p>Ehillstrom: Added Supplies and Set Up</p> <hr /> <div>What follows is a complete set of instructions for completing a long-distance test (of any length) with the current [[Optical Communications]] transmitter/receiver node system.<br /> <br /> == What You'll Need ==<br /> Before heading out to test, ensure that you have the following pieces of equipment: &lt;br&gt;<br /> 1) '''Transmit/receive [[OpComms System IV|node]].''' Ensure that the laser, photodetector, control board, and BNC connection between sensor and board are all present. &lt;br&gt;<br /> 2) '''Tripod.''' Make sure the tripod matches the node you have chosen. The Rosencrantz tripod has a round plate with a hole in the center; the Guildenstern tripod has a large tri-lobed plate that is continuous. &lt;br&gt;<br /> 3) '''Laptop.''' Ensure your code is up to date by pulling from the OpComms Github repository. &lt;br&gt;<br /> 4) '''Keysight oscilloscope.''' Have Sasha or Elizabeth unlock an oscilloscope from the toolbox. Guard it with your life.<br /> 4) '''Test bin.''' Must contain toolbox, extension cords, power supplies, and motorized alt/az mount. Use a dry-erase marker to complete the Test Checklist posted on the lid of the bin. If all of the contents are present you may proceed &lt;br&gt;<br /> <br /> == Set Up ==<br /> '''Step 1:''' Set up tripod on a piece of level ground. Attempt to identify the approximate location of the communicating node and ensure you have a clear line of sight in that direction. &lt;br&gt;<br /> '''Step 2:''' Find a source of AC power and run an extension cord to your test site. Verify you have at least 2 outlets available, using a power strip if necessary. &lt;br&gt;<br /> '''Step 3:''' Attach motorized alt/az mount. Use the attached mounting hardware to screw through the tripod plate and into the bottom of the mount. Ensure that the mount is solidly attached. If you are using the Guildenstern tripod, make sure that all three feet on the base of the mount are in contact with the surface of the tripod plate (if not, rotate). &lt;br&gt;<br /> '''Step 4:''' Find the leather battery purse and plug it into the mount. Verify that all batteries (AA) are present and replace if missing. Hang or support the purse somewhere on the tripod.<br /> '''Step 5:''' Attach the transmit/receive node to the mount by sliding the black plastic adapter on the node into the mount's slot. Make sure that the angled and flat faces are oriented correctly and that the adapter block slides fully into the slot. Tighten the set screw on the mount, ensuring a firm connection (although do not overtighten, as the screw is bearing on plastic). &lt;br&gt;<br /> '''Step 6:''' Find the modular cable (phone jack) in the yellow toolbox and connect it between the mount and the control board. &lt;br&gt;<br /> '''Step 7:''' Find the photodetector's power supply in the test bin (2 parts: one large block that plugs into AC + one 3-pin cable that connects to the block). Plug one side into AC. Plug the other side into the unoccupied port on the sensor, by first aligning the pins, pressing firmly, and screwing down the retaining collar. Make sure the switch on the power supply block is switched on, and verify that the sensor has power (check for green light between power and BNC ports on the top face of the sensor). &lt;br&gt;<br /> '''Step 8:''' Set up and plug in the Keysight oscilloscope. Toggle the power switch to start the boot sequence. Find the BNC cable in the yellow toolbox and connect the downward-facing BNC port on the control board to Source 1 on the oscilloscope. Adjust the vertical scaling to 20mV/division and the horizontal scaling to 10us/division. &lt;br&gt;<br /> '''Step 9:''' Find the microUSB cable in the yellow toolbox and connect the control board to a USB port on your computer. Open Arduino and connect to the board (Teensy 3.1), ensuring that a serial port appears in the Tools menu. Upload the code to the board and open the serial monitor when this is complete. &lt;br&gt;<br /> '''Step 10:''' Remove the lens cap from the node and ensure that the switch cover on the laser is flipped such that the button is continuously depressed. &lt;br&gt;<br /> &lt;br&gt;<br /> You're done! Let's test!<br /> <br /> ==Test==<br /> <br /> ==Pack Up==<br /> <br /> [[Category:Optical Communications]]</div>

Ehillstrom https://ssi-wiki.stanford.edu/w/index.php?title=OpComms_System_IV_Mechanical_Design_Log&diff=743 2015-12-11T20:57:44Z

<p>Ehillstrom: added stub in Mech. drawings</p> <hr /> <div>This page details the mechanical design and manufacturing process for the latest revision of the [[Satellites | Optical Communications Team]] receiver system, [[OpComms System IV|System IV]], otherwise known as Baby Black Box. Although the first design iteration of this system is complete, some refinements may follow, with the possible addition of a laser to the receive node to enable bidirectionality in communications and alignment.<br /> <br /> == Initial Design Concept ==<br /> The design goals of this system were: (1) to decrease weight, so as to decrease strain on the motor, (2) complementarily, to decrease torque on the motor, particularly in the axis of altitude rotation, and (3) to more finely focus light into the photodetector system.<br /> <br /> The first two goals were addressed by purchasing a [[https://en.wikipedia.org/wiki/Fresnel_lens| Fresnel lens]] with a slightly shorter focal length than the previous system, allowing the whole receiver to have a smaller depth, and by changing the format of the frame from a Duron (hardboard) cube to a pyramid structure composed of carbon fiber, plastic, and foamcore (although this was initially planned as plastic sheeting). The carbon fiber framing serves to provide a structural element for Baby Black Box, ensuring that the thin Fresnel lens is not under any external loads and will not deform. In addition, an effort was made to provide a mounting point calibrated to the center of mass of Baby Black Box, such that the torques were balanced about the axis of altitude rotation of the motorized mount. Due to the pyramidal shape, this resulted in a reduction of torque about the horizontal axis as well. The corner mounting points set the angle between carbon fiber rods to precisely control the focal distance of the Fresnel lens, and snap connections serve to secure the photodetector in place. The foamcore sides and lens cap protect the optics of the device and to screen out external light ([[Signal-to-noise ratio#Noise|noise]]).<br /> <br /> To address the third design goal, a secondary aspherical lens was purchased. An enclosure was created to fix this lens directly to the photodetector, with the intent that the focal calibration of this lens would be much less sensitive to misalignment from transport and handling.<br /> <br /> The following drawings show the initial design process and supporting analysis. This is by no means constitutes a full engineering review, but demonstrates the thought process behind key design decisions.<br /> <br /> &lt;gallery widths=300px heights=300px&gt;<br /> |align=center<br /> File:SysIV_Initial_Design.png | &lt;center&gt; Initial design concept &lt;/center&gt;<br /> File:SysIV_Lens_Math.png |&lt;center&gt; Lens focal distance/depth calculations &lt;/center&gt;<br /> File:SysIV_Lens_Math_Whiteboard.jpg|&lt;center&gt; Secondary optic placement calculations &lt;/center&gt;<br /> File:SysIV_Mounting_Bracket_Design.png |&lt;center&gt; Design for mounting bracket &lt;/center&gt;<br /> File:SysIV_PD_Clip_Design.jpg|&lt;center&gt; Design for photodetector mounting clip &lt;/center&gt;<br /> &lt;/gallery&gt;<br /> <br /> == Mechanical Drawings ==<br /> What follows is a the complete set of assembly and component drawings for the system. These drawings were generated with Dassault Systèmes SolidWorks.<br /> <br /> {{opcomms-stub}}<br /> <br /> == Manufacturing ==<br /> The connections for Baby Black Box were 3D printed in ABS plastic using a Stratasys Fused Deposition Modeling (FDM) machine. An attempt was made to orient printed parts to align the layering of the printer such that it did not follow the principle axes of stress. Tolerances were set at 0.01 inches to create firm joints where carbon fiber rod was inserted into end caps, and to ensure sound contact in snap connectors.<br /> <br /> The structural members were cut from 0.29&quot; uni-axially wrapped carbon fiber rod and were cemented into their sockets once the the lengths were checked for accuracy.<br /> <br /> An adaptor block, used to interface with the altitude azimuth mounting system, had been previously manufactured by the team. This block has one slanted side and one straight one, which match the interior surfaces of the arms' mounting system, and two mounting holes used to bolt on a receiver system. The block was machined from Delrin plastic (a brand name for acetal resin, or [[https://en.wikipedia.org/wiki/Polyoxymethylene| Polyoxymethylene]]), which is known for its durability and machinability. This adaptor was used with several previous OpComms systems.<br /> <br /> == Addition of Laser for Bidirectionality ==<br /> It has been proposed that the system integrate a laser mount directly into Baby Black Box. This would allow nodes to be identical and implement a symmetrical alignment and fine adjustment algorithm in the field, as well as enabling communications in both directions. If the team decides to pursue this path, design work for a bidirectional system will commence in January of 2016.<br /> <br /> <br /> [[Category:Optical Communications]]</div>

Ehillstrom https://ssi-wiki.stanford.edu/w/index.php?title=OpComms_System_IV_Mechanical_Design_Log&diff=742 2015-12-11T20:52:44Z

<p>Ehillstrom: Standardized punctuation</p> <hr /> <div>This page details the mechanical design and manufacturing process for the latest revision of the [[Satellites | Optical Communications Team]] receiver system, [[OpComms System IV|System IV]], otherwise known as Baby Black Box. Although the first design iteration of this system is complete, some refinements may follow, with the possible addition of a laser to the receive node to enable bidirectionality in communications and alignment.<br /> <br /> == Initial Design Concept ==<br /> The design goals of this system were: (1) to decrease weight, so as to decrease strain on the motor, (2) complementarily, to decrease torque on the motor, particularly in the axis of altitude rotation, and (3) to more finely focus light into the photodetector system.<br /> <br /> The first two goals were addressed by purchasing a [[https://en.wikipedia.org/wiki/Fresnel_lens| Fresnel lens]] with a slightly shorter focal length than the previous system, allowing the whole receiver to have a smaller depth, and by changing the format of the frame from a Duron (hardboard) cube to a pyramid structure composed of carbon fiber, plastic, and foamcore (although this was initially planned as plastic sheeting). The carbon fiber framing serves to provide a structural element for Baby Black Box, ensuring that the thin Fresnel lens is not under any external loads and will not deform. In addition, an effort was made to provide a mounting point calibrated to the center of mass of Baby Black Box, such that the torques were balanced about the axis of altitude rotation of the motorized mount. Due to the pyramidal shape, this resulted in a reduction of torque about the horizontal axis as well. The corner mounting points set the angle between carbon fiber rods to precisely control the focal distance of the Fresnel lens, and snap connections serve to secure the photodetector in place. The foamcore sides and lens cap protect the optics of the device and to screen out external light ([[Signal-to-noise ratio#Noise|noise]]).<br /> <br /> To address the third design goal, a secondary aspherical lens was purchased. An enclosure was created to fix this lens directly to the photodetector, with the intent that the focal calibration of this lens would be much less sensitive to misalignment from transport and handling.<br /> <br /> The following drawings show the initial design process and supporting analysis. This is by no means constitutes a full engineering review, but demonstrates the thought process behind key design decisions.<br /> <br /> &lt;gallery widths=300px heights=300px&gt;<br /> |align=center<br /> File:SysIV_Initial_Design.png | &lt;center&gt; Initial design concept &lt;/center&gt;<br /> File:SysIV_Lens_Math.png |&lt;center&gt; Lens focal distance/depth calculations &lt;/center&gt;<br /> File:SysIV_Lens_Math_Whiteboard.jpg|&lt;center&gt; Secondary optic placement calculations &lt;/center&gt;<br /> File:SysIV_Mounting_Bracket_Design.png |&lt;center&gt; Design for mounting bracket &lt;/center&gt;<br /> File:SysIV_PD_Clip_Design.jpg|&lt;center&gt; Design for photodetector mounting clip &lt;/center&gt;<br /> &lt;/gallery&gt;<br /> <br /> == Mechanical Drawings ==<br /> What follows is a the complete set of assembly and component drawings for the system. These drawings were generated with Dassault Systèmes SolidWorks.<br /> <br /> == Manufacturing ==<br /> The connections for Baby Black Box were 3D printed in ABS plastic using a Stratasys Fused Deposition Modeling (FDM) machine. An attempt was made to orient printed parts to align the layering of the printer such that it did not follow the principle axes of stress. Tolerances were set at 0.01 inches to create firm joints where carbon fiber rod was inserted into end caps, and to ensure sound contact in snap connectors.<br /> <br /> The structural members were cut from 0.29&quot; uni-axially wrapped carbon fiber rod and were cemented into their sockets once the the lengths were checked for accuracy.<br /> <br /> An adaptor block, used to interface with the altitude azimuth mounting system, had been previously manufactured by the team. This block has one slanted side and one straight one, which match the interior surfaces of the arms' mounting system, and two mounting holes used to bolt on a receiver system. The block was machined from Delrin plastic (a brand name for acetal resin, or [[https://en.wikipedia.org/wiki/Polyoxymethylene| Polyoxymethylene]]), which is known for its durability and machinability. This adaptor was used with several previous OpComms systems.<br /> <br /> == Addition of Laser for Bidirectionality ==<br /> It has been proposed that the system integrate a laser mount directly into Baby Black Box. This would allow nodes to be identical and implement a symmetrical alignment and fine adjustment algorithm in the field, as well as enabling communications in both directions. If the team decides to pursue this path, design work for a bidirectional system will commence in January of 2016.<br /> <br /> <br /> [[Category:Optical Communications]]</div>

Ehillstrom https://ssi-wiki.stanford.edu/w/index.php?title=OpComms_System_IV_Mechanical_Design_Log&diff=741 2015-12-11T20:52:17Z

<p>Ehillstrom: Added images to initial design gallery</p> <hr /> <div>This page details the mechanical design and manufacturing process for the latest revision of the [[Satellites | Optical Communications Team]] receiver system, [[OpComms System IV|System IV]], otherwise known as Baby Black Box. Although the first design iteration of this system is complete, some refinements may follow, with the possible addition of a laser to the receive node to enable bidirectionality in communications and alignment.<br /> <br /> == Initial Design Concept ==<br /> The design goals of this system were: (1) to decrease weight, so as to decrease strain on the motor, (2) complementarily, to decrease torque on the motor, particularly in the axis of altitude rotation, and (3) to more finely focus light into the photodetector system.<br /> <br /> The first two goals were addressed by purchasing a [[https://en.wikipedia.org/wiki/Fresnel_lens| Fresnel lens]] with a slightly shorter focal length than the previous system, allowing the whole receiver to have a smaller depth, and by changing the format of the frame from a Duron (hardboard) cube to a pyramid structure composed of carbon fiber, plastic, and foamcore (although this was initially planned as plastic sheeting). The carbon fiber framing serves to provide a structural element for Baby Black Box, ensuring that the thin Fresnel lens is not under any external loads and will not deform. In addition, an effort was made to provide a mounting point calibrated to the center of mass of Baby Black Box, such that the torques were balanced about the axis of altitude rotation of the motorized mount. Due to the pyramidal shape, this resulted in a reduction of torque about the horizontal axis as well. The corner mounting points set the angle between carbon fiber rods to precisely control the focal distance of the Fresnel lens, and snap connections serve to secure the photodetector in place. The foamcore sides and lens cap protect the optics of the device and to screen out external light ([[Signal-to-noise ratio#Noise|noise]]).<br /> <br /> To address the third design goal, a secondary aspherical lens was purchased. An enclosure was created to fix this lens directly to the photodetector, with the intent that the focal calibration of this lens would be much less sensitive to misalignment from transport and handling.<br /> <br /> The following drawings show the initial design process and supporting analysis. This is by no means constitutes a full engineering review, but demonstrates the thought process behind key design decisions.<br /> <br /> &lt;gallery widths=300px heights=300px&gt;<br /> |align=center<br /> File:SysIV_Initial_Design.png | &lt;center&gt; Initial design concept. &lt;/center&gt;<br /> File:SysIV_Lens_Math.png |&lt;center&gt; Lens focal distance/depth calculations. &lt;/center&gt;<br /> File:SysIV_Lens_Math_Whiteboard.jpg|&lt;center&gt; Secondary optic placement calculations &lt;/center&gt;<br /> File:SysIV_Mounting_Bracket_Design.png |&lt;center&gt; Design for mounting bracket. &lt;/center&gt;<br /> File:SysIV_PD_Clip_Design.jpg|&lt;center&gt; Design for photodetector mounting clip &lt;/center&gt;<br /> &lt;/gallery&gt;<br /> <br /> == Mechanical Drawings ==<br /> What follows is a the complete set of assembly and component drawings for the system. These drawings were generated with Dassault Systèmes SolidWorks.<br /> <br /> == Manufacturing ==<br /> The connections for Baby Black Box were 3D printed in ABS plastic using a Stratasys Fused Deposition Modeling (FDM) machine. An attempt was made to orient printed parts to align the layering of the printer such that it did not follow the principle axes of stress. Tolerances were set at 0.01 inches to create firm joints where carbon fiber rod was inserted into end caps, and to ensure sound contact in snap connectors.<br /> <br /> The structural members were cut from 0.29&quot; uni-axially wrapped carbon fiber rod and were cemented into their sockets once the the lengths were checked for accuracy.<br /> <br /> An adaptor block, used to interface with the altitude azimuth mounting system, had been previously manufactured by the team. This block has one slanted side and one straight one, which match the interior surfaces of the arms' mounting system, and two mounting holes used to bolt on a receiver system. The block was machined from Delrin plastic (a brand name for acetal resin, or [[https://en.wikipedia.org/wiki/Polyoxymethylene| Polyoxymethylene]]), which is known for its durability and machinability. This adaptor was used with several previous OpComms systems.<br /> <br /> == Addition of Laser for Bidirectionality ==<br /> It has been proposed that the system integrate a laser mount directly into Baby Black Box. This would allow nodes to be identical and implement a symmetrical alignment and fine adjustment algorithm in the field, as well as enabling communications in both directions. If the team decides to pursue this path, design work for a bidirectional system will commence in January of 2016.<br /> <br /> <br /> [[Category:Optical Communications]]</div>

Ehillstrom https://ssi-wiki.stanford.edu/w/index.php?title=File:SysIV_PD_Clip_Design.jpg&diff=740 2015-12-11T20:51:36Z

<p>Ehillstrom: Ehillstrom uploaded a new version of File:SysIV PD Clip Design.jpg</p> <hr /> <div></div>

Ehillstrom https://ssi-wiki.stanford.edu/w/index.php?title=File:SysIV_PD_Clip_Design.jpg&diff=739 2015-12-11T20:49:13Z

<p>Ehillstrom: </p> <hr /> <div></div>

Ehillstrom https://ssi-wiki.stanford.edu/w/index.php?title=File:SysIV_Lens_Math_Whiteboard.jpg&diff=738 2015-12-11T20:44:52Z

<p>Ehillstrom: </p> <hr /> <div></div>

Ehillstrom https://ssi-wiki.stanford.edu/w/index.php?title=OpComms_System_IV_Mechanical_Design_Log&diff=737 2015-12-11T10:00:01Z

<p>Ehillstrom: Added Sections: Initial Design Concept, Mechanical Drawings, Manufucturing, and Laser Bidirectionality</p> <hr /> <div>This page details the mechanical design and manufacturing process for the latest revision of the [[Satellites | Optical Communications Team]] receiver system, [[OpComms System IV|System IV]], otherwise known as Baby Black Box. Although the first design iteration of this system is complete, some refinements may follow, with the possible addition of a laser to the receive node to enable bidirectionality in communications and alignment.<br /> <br /> == Initial Design Concept ==<br /> The design goals of this system were: (1) to decrease weight, so as to decrease strain on the motor, (2) complementarily, to decrease torque on the motor, particularly in the axis of altitude rotation, and (3) to more finely focus light into the photodetector system.<br /> <br /> The first two goals were addressed by purchasing a [[https://en.wikipedia.org/wiki/Fresnel_lens| Fresnel lens]] with a slightly shorter focal length than the previous system, allowing the whole receiver to have a smaller depth, and by changing the format of the frame from a Duron (hardboard) cube to a pyramid structure composed of carbon fiber, plastic, and foamcore (although this was initially planned as plastic sheeting). The carbon fiber framing serves to provide a structural element for Baby Black Box, ensuring that the thin Fresnel lens is not under any external loads and will not deform. In addition, an effort was made to provide a mounting point calibrated to the center of mass of Baby Black Box, such that the torques were balanced about the axis of altitude rotation of the motorized mount. Due to the pyramidal shape, this resulted in a reduction of torque about the horizontal axis as well. The corner mounting points set the angle between carbon fiber rods to precisely control the focal distance of the Fresnel lens, and snap connections serve to secure the photodetector in place. The foamcore sides and lens cap protect the optics of the device and to screen out external light ([[Signal-to-noise ratio#Noise|noise]]).<br /> <br /> To address the third design goal, a secondary aspherical lens was purchased. An enclosure was created to fix this lens directly to the photodetector, with the intent that the focal calibration of this lens would be much less sensitive to misalignment from transport and handling.<br /> <br /> The following drawings show the initial design process and supporting analysis. This is by no means constitutes a full engineering review, but demonstrates the thought process behind key design decisions.<br /> <br /> &lt;gallery widths=300px heights=300px&gt;<br /> |align=center<br /> File:SysIV_Initial_Design.png | &lt;center&gt; Initial design concept. &lt;/center&gt;<br /> File:SysIV_Lens_Math.png |&lt;center&gt; Lens focal distance/depth calculations. &lt;/center&gt;<br /> File:SysIV_Mounting_Bracket_Design.png |&lt;center&gt; Design of mounting bracket. &lt;/center&gt;<br /> &lt;/gallery&gt;<br /> <br /> == Mechanical Drawings ==<br /> What follows is a the complete set of assembly and component drawings for the system. These drawings were generated with Dassault Systèmes SolidWorks.<br /> <br /> == Manufacturing ==<br /> The connections for Baby Black Box were 3D printed in ABS plastic using a Stratasys Fused Deposition Modeling (FDM) machine. An attempt was made to orient printed parts to align the layering of the printer such that it did not follow the principle axes of stress. Tolerances were set at 0.01 inches to create firm joints where carbon fiber rod was inserted into end caps, and to ensure sound contact in snap connectors.<br /> <br /> The structural members were cut from 0.29&quot; uni-axially wrapped carbon fiber rod and were cemented into their sockets once the the lengths were checked for accuracy.<br /> <br /> An adaptor block, used to interface with the altitude azimuth mounting system, had been previously manufactured by the team. This block has one slanted side and one straight one, which match the interior surfaces of the arms' mounting system, and two mounting holes used to bolt on a receiver system. The block was machined from Delrin plastic (a brand name for acetal resin, or [[https://en.wikipedia.org/wiki/Polyoxymethylene| Polyoxymethylene]]), which is known for its durability and machinability. This adaptor was used with several previous OpComms systems.<br /> <br /> == Addition of Laser for Bidirectionality ==<br /> It has been proposed that the system integrate a laser mount directly into Baby Black Box. This would allow nodes to be identical and implement a symmetrical alignment and fine adjustment algorithm in the field, as well as enabling communications in both directions. If the team decides to pursue this path, design work for a bidirectional system will commence in January of 2016.<br /> <br /> <br /> [[Category:Optical Communications]]</div>

Ehillstrom https://ssi-wiki.stanford.edu/w/index.php?title=File:SysIV_Mounting_Bracket_Design.png&diff=736 2015-12-11T09:41:45Z

<p>Ehillstrom: </p> <hr /> <div></div>

Ehillstrom https://ssi-wiki.stanford.edu/w/index.php?title=File:SysIV_Lens_Math.png&diff=735 2015-12-11T09:40:54Z

<p>Ehillstrom: </p> <hr /> <div></div>

Ehillstrom https://ssi-wiki.stanford.edu/w/index.php?title=File:SysIV_Initial_Design.png&diff=734 2015-12-11T09:39:48Z

<p>Ehillstrom: </p> <hr /> <div></div>

Ehillstrom https://ssi-wiki.stanford.edu/w/index.php?title=SSI-24&diff=733 2015-12-09T18:28:32Z

<p>Ehillstrom: Fixed external link (should not specify URL in text)</p> <hr /> <div>{{balloon-launch<br /> | header = SSI-24 (Orion)<br /> | img link = File:ssi_24.png<br /> | launch date = October 24th, 2015, 11:39AM PDT<br /> | launch site = 2093 San Juan Drive, Hollister, CA<br /> | launch coordinates = 36.84842,-121.43236<br /> | flight duration = 3 hours, 44 minutes, 11.1 seconds<br /> | landing date = October 24th, 2015, 3:23:11 PM PDT<br /> | last = 23<br /> | next = 25<br /> }}<br /> <br /> SSI-24 Orion was one of three balloons launched during fall quarter, 2015. It consisted of an almost all-freshman team dedicated to creating a scientifically power yet aesthetically beautiful payload. Ultimately, Orion represented a resounding success in its use of sensors, logging of data, power management, use of solar energy to charge its batteries, demonstration of wifi transmissions, and creation of a visually refined payload. The total ground track was 121.21 miles, and the top speed reached was 92.44 miles per hour. <br /> <br /> SSI-24 also launched the infamous [[SSI-Guy | SSGuy]] or SSI-Guy. <br /> <br /> == Pre-Launch == <br /> <br /> The Pre-Launch proceeded fairly well with few hiccups. After fixing minor problems with the solar panel wiring, the team prepared the gimbal and finished visual preparation of the payload. Unfortunately, the team experienced extreme difficulties setting up the keychain camera (which did not function during flight). The payload, which consisted of two styrofoam boxes and a selfie stick, was attached to a single 1500g balloon. <br /> <br /> == Flight == <br /> <br /> [[File:SSI24 map.png | thumb | &lt;center&gt;SSI 24 ground track. The GPS was likely deactivated above 60,000 feet due to poor firmware implementation.&lt;/center&gt;]]<br /> <br /> SSI-24 used the [http://habmc.stanfordssi.org/#/app/spot_four|SPOT Nebula] for tracking and recovery. A Phantom 2 UAV was used by members of Orion to video the launch of SSI-23a, 23, 24, and 25. <br /> <br /> <br /> [[File:Drone.jpg | thumb | &lt;center&gt; Phantom 2 &lt;/center&gt;]]<br /> <br /> == Experimental Payload == <br /> <br /> [[File:SSI24-perspective.jpg | thumb | &lt;center&gt; Perspective view of the Orion sensor payload. &lt;/center&gt;]]<br /> <br /> SSI-24 included both a Raspberry Pi 2B and two Arduino Uno boards. The Raspberry Pi was initially intended to be used to stream live video from the balloon, however, due to issues with the camera board, it was simply used as a wifi access point. The two Arduino boards regulated the sensors onboard the balloon, including a temperature sensor, two heating pads, an SD reader, a GPS, a solar panel, and an accelerometer. Though the group initially intended to use a PIXY camera as well, the PIXY's requirement to be updated with signatures made it difficult to use aboard the balloon. <br /> <br /> The second board served a single purpose: dropping three Hershey's chocolate bars at a specified altitude. This was accomplished using the GPS altitude from the first Arduino, which would set a single digital pin to high. This would trigger the second Arduino to swing a servo and release the bars. <br /> <br /> [[File:OrionWifi.jpg | thumb | &lt;center&gt; Wifi Antenna &lt;/center&gt;]]<br /> <br /> == Landing Drama == <br /> <br /> Upon landing, SSI-24 was discovered by two passers-by. They kindly brought it to their home and phoned the balloons team, who recovered it soon after. <br /> <br /> == Milestones == <br /> <br /> * First use of wifi antennas and Raspberry Pi on an SSI high altitude balloon<br /> * Successful implementation of a gimbal for the SPOT GPS<br /> <br /> {{balloon-footer}}<br /> [[Category: High Altitude Balloons]][[Category: Balloon Launches]]</div>

Ehillstrom https://ssi-wiki.stanford.edu/w/index.php?title=SSI-24&diff=732 2015-12-09T18:27:04Z

<p>Ehillstrom: changed picture ;)</p> <hr /> <div>{{balloon-launch<br /> | header = SSI-24 (Orion)<br /> | img link = File:ssi_24.png<br /> | launch date = October 24th, 2015, 11:39AM PDT<br /> | launch site = 2093 San Juan Drive, Hollister, CA<br /> | launch coordinates = 36.84842,-121.43236<br /> | flight duration = 3 hours, 44 minutes, 11.1 seconds<br /> | landing date = October 24th, 2015, 3:23:11 PM PDT<br /> | last = 23<br /> | next = 25<br /> }}<br /> <br /> SSI-24 Orion was one of three balloons launched during fall quarter, 2015. It consisted of an almost all-freshman team dedicated to creating a scientifically power yet aesthetically beautiful payload. Ultimately, Orion represented a resounding success in its use of sensors, logging of data, power management, use of solar energy to charge its batteries, demonstration of wifi transmissions, and creation of a visually refined payload. The total ground track was 121.21 miles, and the top speed reached was 92.44 miles per hour. <br /> <br /> SSI-24 also launched the infamous [[SSI-Guy | SSGuy]] or SSI-Guy. <br /> <br /> == Pre-Launch == <br /> <br /> The Pre-Launch proceeded fairly well with few hiccups. After fixing minor problems with the solar panel wiring, the team prepared the gimbal and finished visual preparation of the payload. Unfortunately, the team experienced extreme difficulties setting up the keychain camera (which did not function during flight). The payload, which consisted of two styrofoam boxes and a selfie stick, was attached to a single 1500g balloon. <br /> <br /> == Flight == <br /> <br /> [[File:SSI24 map.png | thumb | &lt;center&gt;SSI 24 ground track. The GPS was likely deactivated above 60,000 feet due to poor firmware implementation.&lt;/center&gt;]]<br /> <br /> SSI-24 used the SPOT Nebula for tracking and recovery. See http://habmc.stanfordssi.org/#/app/spot_four. A Phantom 2 UAV was used by members of Orion to video the launch of SSI-23a, 23, 24, and 25. <br /> <br /> <br /> [[File:Drone.jpg | thumb | &lt;center&gt; Phantom 2 &lt;/center&gt;]]<br /> <br /> == Experimental Payload == <br /> <br /> [[File:SSI24-perspective.jpg | thumb | &lt;center&gt; Perspective view of the Orion sensor payload. &lt;/center&gt;]]<br /> <br /> SSI-24 included both a Raspberry Pi 2B and two Arduino Uno boards. The Raspberry Pi was initially intended to be used to stream live video from the balloon, however, due to issues with the camera board, it was simply used as a wifi access point. The two Arduino boards regulated the sensors onboard the balloon, including a temperature sensor, two heating pads, an SD reader, a GPS, a solar panel, and an accelerometer. Though the group initially intended to use a PIXY camera as well, the PIXY's requirement to be updated with signatures made it difficult to use aboard the balloon. <br /> <br /> The second board served a single purpose: dropping three Hershey's chocolate bars at a specified altitude. This was accomplished using the GPS altitude from the first Arduino, which would set a single digital pin to high. This would trigger the second Arduino to swing a servo and release the bars. <br /> <br /> [[File:OrionWifi.jpg | thumb | &lt;center&gt; Wifi Antenna &lt;/center&gt;]]<br /> <br /> == Landing Drama == <br /> <br /> Upon landing, SSI-24 was discovered by two passers-by. They kindly brought it to their home and phoned the balloons team, who recovered it soon after. <br /> <br /> == Milestones == <br /> <br /> * First use of wifi antennas and Raspberry Pi on an SSI high altitude balloon<br /> * Successful implementation of a gimbal for the SPOT GPS<br /> <br /> {{balloon-footer}}<br /> [[Category: High Altitude Balloons]][[Category: Balloon Launches]]</div>

Ehillstrom https://ssi-wiki.stanford.edu/w/index.php?title=SNAPS&diff=730 2015-12-07T15:37:29Z

<p>Ehillstrom: removed Thomas motivation</p> <hr /> <div>{{satellites-stub}}<br /> <br /> [[Category: Satellites]]</div>

Ehillstrom https://ssi-wiki.stanford.edu/w/index.php?title=Prometheus&diff=729 2015-12-07T03:28:28Z

<p>Ehillstrom: changed stub ordering</p> <hr /> <div>Prometheus is one of four rockets under [[Project Daedalus]] which is focused on demonstrating roll control of a payload decent using deployed fins and a PID controller.<br /> <br /> {{rocket-stub}}<br /> <br /> [[Category:Rockets]]</div>

Ehillstrom https://ssi-wiki.stanford.edu/w/index.php?title=List_of_Missions&diff=728 2015-12-07T03:22:59Z

<p>Ehillstrom: resized cells</p> <hr /> <div>This page contains a list of notable tests or launches which have been given mission status (denoted by a mission patch). The mission patch system was introduced in 2015.<br /> <br /> <br /> <br /> &lt;gallery widths=250px heights=250px&gt;<br /> |align=center<br /> File:Rsz 11ssi 19.png|&lt;center&gt; [[SSI-19]], Balloons Team, May 16th 2015 &lt;/center&gt;<br /> File:Rsz ssi-22.png |&lt;center&gt; [[SSI-22]], Balloons Team, May 31st 2015 &lt;/center&gt;<br /> File:SSI-1E4.png|&lt;center&gt; [[SSI-1E4]], OpComms Team, June 4, 2015 &lt;/center&gt;<br /> File:Ssi 23.png |&lt;center&gt; [[SSI-23]], Balloons Team, October 24th, 2015 &lt;/center&gt;<br /> File:Ssi 24.png |&lt;center&gt; [[SSI-24]], Balloons Team, October 24th, 2015 &lt;/center&gt;<br /> File:Ssi 25.png |&lt;center&gt; [[SSI-25]], Balloons Team, October 24th, 2015 &lt;/center&gt;<br /> &lt;/gallery&gt;</div>

Ehillstrom https://ssi-wiki.stanford.edu/w/index.php?title=SNAPS&diff=726 2015-12-06T21:47:16Z

<p>Ehillstrom: motivate Thomas to actually update this page</p> <hr /> <div>The baby launched! What a cute wittle itty bitty satewite.<br /> <br /> {{satellites-stub}}<br /> <br /> [[Category: Satellites]]</div>

Ehillstrom https://ssi-wiki.stanford.edu/w/index.php?title=OpComms_System_IV&diff=725 2015-12-06T20:21:25Z

<p>Ehillstrom: linked to noise</p> <hr /> <div>OpComms System IV is the latest design iteration of the [[Satellites|OpComms]] optical link, and is currently under development. This version features a redesigned Fresnel lens receiver, incorporating a secondary focusing optic and improved mechanical characteristics, and will include a complete code and control electronics overhaul.<br /> <br /> ==Receiver System Update: Baby Black Box==<br /> [[File:BBB_night_test.png|frame|right|Baby Black Box uses a Fresnel lens similar to System III]]<br /> The latest OpComms receiver system, named ''Baby Black Box,'' is an update of the older [[OpComms System III#Fresnel Lens|Fresnel lens receiver]]. The design goals for the update were three: (1) to decrease weight, so as to decrease strain on the motor, (2) complementarily, to decrease torque on the motor, particularly in the axis of altitude rotation, and (3) to more finely focus light into the photodetector system.<br /> <br /> The first two goals were addressed by purchasing a Fresnel lens with a slightly shorter focal length than the previous system, allowing the whole receiver to have a smaller depth, and by changing the format of the frame from a Duron (hardboard) cube to a pyramid structure composed of carbon fiber, plastic, and foamcore. The carbon fiber framing provides the structural element for Baby Black Box, ensuring that the thin Fresnel lens is not under any external loads and therefore will not deform. In addition, an effort was made to provide a mounting point calibrated to the center of mass of Baby Black Box, such that the torques were balanced about the axis of altitude rotation of the motorized mount. Due to the pyramidal shape, this resulted in a reduction of torque about the horizontal axis as well.<br /> <br /> The connections for Baby Black Box were 3D printed in ABS plastic. Corner mounting points set the angle between carbon fiber rods to precisely control the focal distance of the Fresnel lens, and snap connections secure the photodetector in place, as well as the foamcore sides and lens cap, which serve to protect the optics of the device and to screen out external light ([[Signal-to-noise ratio#Noise|noise]]).<br /> <br /> To address the third design goal, a secondary aspherical lens was purchased. An enclosure was created to fix this lens directly to the photodetector, with the intent that the focal calibration of this lens would be much less sensitive to misalignment from transport and handling.<br /> <br /> Further details of Baby Black Box can be found in the [[OpComms System IV Mechanical Design Log|System IV Mechanical Design Log]].<br /> <br /> &lt;gallery widths=300px heights=300px&gt;<br /> |align=center<br /> File:BBB_uncovered.jpg | &lt;center&gt; Baby Black Box incorporates an aspherical secondary focusing optic fixed to the photodetector. &lt;/center&gt;<br /> File:BBB_covered.jpg |&lt;center&gt; Rigid foamcore covers snap onto each side with 3D printed plastic clips &lt;/center&gt;<br /> File:BBB_test_stars.jpg |&lt;center&gt; A preliminary 10km test with Baby Black Box at [[W6YX]] &lt;/center&gt;<br /> &lt;/gallery&gt;<br /> <br /> ==New Laser Color: Red==<br /> [[File:beam_splitting.jpg|frame|right|The team observed a curious phenomenon of complete beam separation that seems to occur at low operating temperatures]]<br /> A series of tests over 500m and 10km during Autumn quarter demonstrated an interesting and problematic phenomenon for the laser system: the beam seemed to arbitrarily switch between a normal operating mode and a mode which split into two fully separate spots. Experimentation revealed that this effect was thermally driven, an explanation confirmed by consulting the manufacturing specifications which listed a lower bound for the laser's operating temperature range that exactly matched the ambient temperature for the previous series of tests.<br /> <br /> An attempt was made to build a heater system for the laser, but the team concluded that a better solution would be to switch to a laser of equivalent power output and class, but at the 635 nm wavelength (red). There were two reasons for the switch: first, that the red laser's range of acceptable operating temperatures included the typical set of ambient temperatures for OpComms tests, and second, that the team's existing photodetector [http://www.thorlabs.us/thorproduct.cfm?partnumber=PDA8A] is slightly more sensitive to light at 635 nm than at either of the two previously tested colors (green, 532 nm, and blue, 450 nm).<br /> <br /> ==Code Overhaul==<br /> The team is in the process of integrating all programming functionality into one interface. The new code system will be written in Python3 and interface directly with a Nucleo board to control motorized mount positions, alignment search algorithms, and data handling. The code overhaul will also feature an integrated Graphical User Interface that combines all functionality into one application.<br /> <br /> ==Electronics Update==<br /> In parallel with the code update, the OpComms group is currently working to interface directly with the motorized altitude/azimuth mounts that control the orientations of both the transmitter and receiver. In addition, the new electronics system for the receiver will feature signal amplification and filtering.<br /> <br /> [[Category: Optical Communications]]</div>

Ehillstrom https://ssi-wiki.stanford.edu/w/index.php?title=User_talk:Amilich&diff=724 2015-12-06T17:17:16Z

<p>Ehillstrom: Created blank page</p> <hr /> <div></div>

Ehillstrom https://ssi-wiki.stanford.edu/w/index.php?title=User_talk:Iangomez&diff=722 2015-12-06T17:15:34Z

<p>Ehillstrom: Created blank page</p> <hr /> <div></div>

Ehillstrom https://ssi-wiki.stanford.edu/w/index.php?title=User_talk:Elongnation&diff=721 2015-12-06T17:15:12Z

<p>Ehillstrom: Created blank page</p> <hr /> <div></div>

Ehillstrom https://ssi-wiki.stanford.edu/w/index.php?title=User_talk:Smaldonado&diff=720 2015-12-06T17:13:34Z

<p>Ehillstrom: Created blank page</p> <hr /> <div></div>

Ehillstrom https://ssi-wiki.stanford.edu/w/index.php?title=List_of_missions&diff=716 2015-12-06T16:42:51Z

<p>Ehillstrom: Redirected page to List of Missions</p> <hr /> <div>#REDIRECT [[List of Missions]]</div>

Ehillstrom