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Science Technology at Cal
Christopher Palacios | cpalacios@berkeley.edu
Overview
CubeSats are gaining increasing attention due to their compact design and high launch density. At Space Technologies at Cal, we've set out to create a CubeSat capable of probing the effects of low Earth orbit conditions on a quantum gyroscope based on nitrogen vacancy centers in diamond. Our objective is to collect rotation data in various environmental conditions to establish viability for space applications such as MEMs.
CubeSat Subsystems
1) Payload: Instrumentation
2) Communications: PyCubed flight computer
3) Power Systems: Battery pack, solar panels, instruments
Payload
NV centers in diamond are sensitive to magnetic fields
A 50mW laser and 2.87 GHz signal with feedback photodiode will be applied to read out the rotation data via the fluorescence of the diamond
Experiments: ODMR, Spin echo
Aiming to miniaturize this technology & test in a space environment
Communications
IMU provides acceleration and turning-rate data, compared to gyroscope data
Watchdog timer resets microprocessor after a time interval
Programmed using Mu-editor and Python
Radio 1 is a HopeRF radio (RFM98PW)
PyCubed Mainboard
Power System
Distributed to and from PyCubed flight computer
Solar panels charge the battery board (2S3P Li-Ion battery configuration, 3.7V 18650 cells )
Battery board will supply payload, comms, and control boards
Power Delivery
HopeRF LoRa Radio
100 mW transmit power
1.8V-3.7V power draw
Battery Board
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