Lithium

 

 

MOVE-ON Lithium shall lay the foundation for the architecture of the MOVE-III
satellite bus. Hard and software shall be developed which, through continuous and iterative improvement, can grow to the MOVE-III system. Additional systems for the reliable conduct of future MOVE-ON shall be developed and improved. Moreover, the Lithium mission will serve as payload platform for the LRT Summer School.

Mission Concept

The system is designed to operate for 5 h, with a flight time of about 2 h. A gondola with the system will be attached to a helium balloon with in the regulations of the balloon class ”light”. On a sunny day it will then be launched from the campus site of the Technical University Munich in Garching. In flight the system has a downlink which provides information about the position. All payload data and and a set of telemetry data will also be send. After an ascent of roughly 2 h the balloon will explode, because of the pressure difference of in and outside. A rapid descend follows. With the attached parachute a descent velocity of about 10 m/s is to be expected. During the whole flight
a mobile ground station in addition to the LRT roof antenna will track the position. This will help with a fast recovery of the system after descent.

Payload interface

  • 3V3 with 100 mA
  • unregulated power
  • 32 Bit/s downlink
  • (70246-12, 22.86 mm wide) for SPI and the 10 pin connector (70246-10, 20.32 mm wide) for UART

Available sensors values

  • Temperature
  • Pressure
  • Humidity
  • Gyroscope
  • Magnetometer
  • GNSS Position

Flight conditions

  • down to -50°C at 35 to 40 km hight
  • nearly vacuum
  • near solar flux as in space
  • around 2h flight time

We launched on the October 13th 2018. The event was part of the TUM Tag der
offenen Tür. The launch site was the soccer filed near the parking space behind the
mechanical engineering building. The gas filling took longer than expected due to a too small valve. This delayed the launch to 2:20 pm German time.

The gondola landed near the Autobahn exit Jengen. We recovered it on the same day as the launch late in the evening. The balloon exploded perfectly since we could find nothing but the small bit which had the rope attached to it. The gondola it self survived it the impact very good. No damage has been seen.