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Category:Satellites (view source)
Revision as of 00:48, 18 September 2023
, 00:48, 18 September 2023→Onboarding Events Calendar 📅: Added to a bunch of stuff! Rearranged some things throughout, added descriptions for subteams
= Our Website: [https://saplingsat.org saplingsat.org] =
= Our Website: [https://saplingsat.org saplingsat.org] =
One of our main goals of the satellites team is to increase accessibility to space, and while we can have made a ton of progress on this from an engineering standpoint, it's pretty limited unless we get the word out. So we made a website! At [https://saplingsat.org '''saplingsat.org'''], you'll be able to find everything from our project overviews to how to assemble our main flight computer. If you wanna take a deep dive into our software repositories or just brush up on terminology, the website is the place for you :)
One of our main goals of the satellites team is to increase accessibility to space, and while we can have made a ton of progress on this from an engineering standpoint, it's pretty limited unless we get the word out. So we made a website! At [https://saplingsat.org '''saplingsat.org'''], you'll be able to find everything from our project overviews to how to assemble our main flight computer. If you wanna take a deep dive into our collective knowledge or just want to brush up on terminology, the website is the place for you :)
= Getting Started with Satellites 🛰️ =
= Getting Started with Satellites 🛰️ =
If you're a Stanford student, professor, or affiliate we'd love for you to join the Satellites community! '''For information on joining SSI as a whole, check out the [[How to Join SSI]] page.'''
If you're a Stanford student, professor, or affiliate we'd love for you to join the Satellites community! '''For information on joining SSI as a whole, check out the [[How to Join SSI]] page.'''
Once you've joined our Slack messaging hub, you'll be able to join all of our Satellites-specific channels! Definitely '''join the [https://ssi-teams.slack.com/messages/satellites general satellites channel]''' which is where we'll post all of our major updates and make big announcements. We've also got a lot of subteams, each with their own channel (we love our Slack channels here at SSI). [https://ssi-wiki.stanford.edu/Category:Satellites#Subteams Check out the Subteams section] on this page to learn about them and join any channels you find interesting.
Once you've joined our Slack messaging hub, you'll be able to join all of our Satellites-specific channels! Definitely '''join the [https://ssi-teams.slack.com/messages/satellites general satellites channel]''' which is where we'll post all of our major updates and make big announcements. We've also got a lot of subteams, each with their own channel (we love our Slack channels here at SSI). '''Check out the Subteams section''' on this page to learn about them and join any channels you find interesting.
And of course if any questions or confusions come up, don't hesitate to reach out to any of the Satellite Team Leads. Also feel free to reach out to Subteam Leads if you have subteam-specific questions!
And of course if any questions or confusions come up, don't hesitate to reach out to any of the Satellite Team Leads. Also feel free to reach out to Subteam Leads if you have subteam-specific questions!
If you're not affiliated with Stanford but are interested in the team and our projects, we'd still love to have you! To get in touch, please email one or all of the team leads [mailto:raigosa@stanford.edu Ashley Raigosa], [mailto:spenwall@stanford.edu Spencer Wallace], and [mailto:theo24@stanford.edu Theo Makler].
If you're not affiliated with Stanford but are interested in the team and our projects, we'd still love to have you! To get in touch, please email one or all of the team leads [mailto:raigosa@stanford.edu Ashley Raigosa], [mailto:spenwall@stanford.edu Spencer Wallace], and [mailto:theo24@stanford.edu Theo Makler].
=== Onboarding Events Calendar 📅 ===
=== SSI Events Calendar 📅 ===
Check out the [https://calendar.google.com/calendar/u/0/embed?src=5or10qu0uhtfqcdqb3knrpn3r8@group.calendar.google.com&ctz=America/Los_Angeles '''SSI Updated General Event Calendar'''] to stay up-to-date on all of our onboarding events! This is still a work-in-progress so stay tuned for more information :)
Check out the [https://calendar.google.com/calendar/u/0/embed?src=5or10qu0uhtfqcdqb3knrpn3r8@group.calendar.google.com&ctz=America/Los_Angeles '''SSI Updated General Event Calendar'''] to stay up-to-date on all of our events! You can also find Satellites-specific events in the Satellites Events Calendar. These are still works-in-progress so stay tuned for more information :)
== Satsurdays and Team Meetings ==
We have team-wide meetings '''every Saturday at noon in [https://maps.app.goo.gl/hj8P2qSLKHK18MRk6 ES3]'''! Satsurdays is a great opportunity to come together as a group and get everyone on the same page, and it's also where we most often make big announcements. In addition to Satsurdays, each of our subteams have weekly meetings which you can find in the Satellites Events Calendar.
== What is a CubeSat? ==
== What is a CubeSat? ==
Slack Channel: [https://ssi-teams.slack.com/messages/satellites-adcs satellites-adcs] Subteam Lead: Grant Regen
Slack Channel: [https://ssi-teams.slack.com/messages/satellites-adcs satellites-adcs] Subteam Lead: Grant Regen
Welcome! As it says in the name, the ADCS subteam is focused on two major parts of our on-orbit operations: figuring out the orientation of the satellite, and controlling this orientation. This is a super important part of any satellite, especially ones that takes pictures like ours. For our past missions we've used sun sensors for our attitude determination and magnetorquer boards for control. The sun sensors measure how much light is hitting each of the six sides of the satellite; by combining information from all six sides, we can roughly determine where the sun is in relation to the satellite, and thus which direction we're pointing. Magnetorquer boards spin the satellite by creating a magnetic field that interacts with the Earth's magnetic field. This interaction creates a force on the satellite, spinning it around an axis.
We have a BUNCH of projects for this subteam for the upcoming SAMWISE mission! In addition to creating new magnetorquer boards for a 2U, we're also developing reaction wheels for more precise pointing ability. Reaction wheels are small spinning disks attached to electric motors that rotate the satellite due to the conservation of angular momentum. Since the angular momentum of the satellite stays the same, when you spin the disk in one direction the satellite spins in the opposite direction! This allows us to control which way the satellite points with a lot more precision than just with magnetorquers. We're also developing a star tracker for our attitude determination, which takes pictures of the stars and figures out where the satellite is pointing. There's tons of super cool stuff happening with this subteam, so definitely join the slack to get started!
=== Avionics ===
=== Avionics ===
Slack channel: [https://ssi-teams.slack.com/messages/satellites-systems satellites-systems] Subteam Lead: kinda everyone!
Slack channel: [https://ssi-teams.slack.com/messages/satellites-systems satellites-systems] Subteam Lead: kinda everyone!
The systems subteam is the subteam for everyone! We focus on making sure all the different pieces of the satellite work together and juggle the demands of various other subsystems. For example, our payload needs a certain amount of power but so does our ADCS system; the systems subteam is where these two groups can come together and work out who gets the available resources. In addition to these kinds of engineering discussions, we also work on administrative and operational topics.
= Missions =
= Missions =
== Current Mission: SAMWISE ==
== Current Mission: SAMWISE ==
Sapling-2 launched on SpaceX's [https://en.wikipedia.org/wiki/List_of_spaceflight_launches_in_January%E2%80%93June_2023#SpXTransporter7 Transporter 7] at 11:48pm PST on April 14th, 2023 from [https://en.wikipedia.org/wiki/Vandenberg_Space_Force_Base Vandenburg Space Force Base] in Southern California. Shortly after deployment contact was made with SSI's Durand ground station.
Sapling-2 launched on SpaceX's [https://en.wikipedia.org/wiki/List_of_spaceflight_launches_in_January%E2%80%93June_2023#SpXTransporter7 Transporter 7] at 11:48pm PST on April 14th, 2023 from [https://en.wikipedia.org/wiki/Vandenberg_Space_Force_Base Vandenburg Space Force Base] in Southern California. Shortly after deployment contact was made with SSI's Durand ground station.
The avionics on Sapling-2 include a PyCubed V(?) main flight computer and is powered with NCR18650B batteries and solar panels on each side panel. As with Sapling-1 the payload was a Google Coral Dev Board Mini computer and a Google Coral Camera, with similar imaging and image processing goals.
The avionics on Sapling-2 include a PyCubed V5 main flight computer and is powered with NCR18650B batteries and solar panels on each side panel. As with Sapling-1 the payload was a Google Coral Dev Board Mini computer and a Google Coral Camera, with similar imaging and image processing goals.
In addition to incremental but critical improvements to the internal electronics of the satellite, Sapling-2 featured a number of major changes from the design of Sapling-1. The first iteration of the (name for the sheet metal structure) debuted on this satellite. This structure, made of off-the-shelf aluminum cut with a CNC and bent into precise shape before being anodized, lowered material costs and allowed for rapid prototyping. An evolution of this structure is being created for the SAMWISE satellite and will underpin all missions in the near future.
In addition to incremental but critical improvements to the internal electronics of the satellite, Sapling-2 featured a number of major changes from the design of Sapling-1. The first iteration of the Heartwood Structure debuted on this satellite. Made of off-the-shelf aluminum cut with a CNC and bent into precise shape before being anodized, this all-new structure lowered material costs and allowed for rapid prototyping. An evolution of this structure is being created for the SAMWISE satellite and will underpin all missions in the near future.
Sapling-2 also showcased an advanced attitude determination and control system (ADCS) featuring magnetorquer coils positioned on each of the six faces of the satellite. When activated, the magnetic field created by these coils interacts with the Earth's magnetic field and generates a torque on the satellite, allowing for rotation around all three axes. This could be used to de-tumble the satellite after deployment and for pointing of the Google Coral camera.
Sapling-2 also showcased an advanced attitude determination and control system (ADCS) featuring magnetorquer coils positioned on each of the six faces of the satellite. When activated, the magnetic field created by these coils interacts with the Earth's magnetic field and generates a torque on the satellite, allowing for rotation around all three axes. This could be used to de-tumble the satellite after deployment and for pointing of the Google Coral camera.
Sapling-1 was launched on SpaceX's [https://en.wikipedia.org/wiki/List_of_spaceflight_launches_in_January%E2%80%93June_2023#SpXTransporter6 Transporter 6] at 10:56am EST on January 3rd, 2023 from [https://en.wikipedia.org/wiki/Cape_Canaveral_Space_Launch_Complex_40 Space Launch Complex 40] in Cape Canaveral, Florida. For this mission, the third-party company we partnered with was successfully deployed from the Falcon 9 rocket and made contact with the ground, but was unable to deploy its customer payloads which included Sapling-1. Even though Sapling-1 never left the deployer, the process of designing, building, testing, and delivering the satellite taught the team a number of crucial lessons which carried over directly to ''Sapling Giganteum''.
Sapling-1 was launched on SpaceX's [https://en.wikipedia.org/wiki/List_of_spaceflight_launches_in_January%E2%80%93June_2023#SpXTransporter6 Transporter 6] at 10:56am EST on January 3rd, 2023 from [https://en.wikipedia.org/wiki/Cape_Canaveral_Space_Launch_Complex_40 Space Launch Complex 40] in Cape Canaveral, Florida. For this mission, the third-party company we partnered with was successfully deployed from the Falcon 9 rocket and made contact with the ground, but was unable to deploy its customer payloads which included Sapling-1. Even though Sapling-1 never left the deployer, the process of designing, building, testing, and delivering the satellite taught the team a number of crucial lessons which carried over directly to ''Sapling Giganteum''.
The avionics on Sapling-1 include a PyCubed V(?) main flight computer, NCR18650B batteries, and solar power based off of the LT3652 chip.
The avionics on Sapling-1 include a PyCubed V4 main flight computer, NCR18650B batteries, and solar power based off of the LT3652 chip.
Paragraph on the software
Paragraph on the software