Changes

'''Tether and floater:''' 30m paracord tether from balloon to payload and 30m paracord tether from balloon to floater. Total tether mass: 0.34kg. Hydrodynamic floater of mass 0.785 kg.

'''Tether and floater:''' 30m paracord tether from balloon to payload and 30m paracord tether from balloon to floater. Total tether mass: 0.34kg. Hydrodynamic floater of mass 0.785 kg.

'''Avionics:''' BMP280, TinyGPS, Teensy 3.2 reporting all data at regular, fixed intervals via RockBlock modem. 2 solar-charged LED modules. Ballast motor controlled by N-type MOSFET.

'''Avionics:''' BMP280, TinyGPS, Teensy 3.2 reporting all data at modifiable intervals via RockBlock modem. Ballast motor controlled by N-type MOSFET. Vent motor controlled by breakout motor driver.

'''Power:''' 18 L91 lithium AA batteries. In comparison with the standard ValBal complement of 12 L92 batteries, this was thought to be more than sufficient under the most optimistic conditions.

'''Power:''' 18 L91 lithium AA batteries.

'''Mass budget:''' 3.42 kg. Counterweight was designed to balance 3.1 kg of total lift, after which ballast would be removed. In actuality, target fill resulted in nearly perfect buoyancy and no significant ballast was removed.

'''Mass budget:''' Total mass under balloon 3.695 kg. Total mass 5.195 kg. Target fill to 1.4 kg of tension at top of tether, translating to 275 kg free lift.

==Flight synopsis==

==Flight synopsis==