Libre Space Foundation completed the mission of building a completely Open-Source 2U CubeSat Satellite from scratch. It’s called “UPSat”.
On April 18th at Cape Canaveral in Florida, Atlas V Rocket launched Private Cygnus Cargo Ship, and UPSat was among its cargo.
With both software and hardware parts published on github. UPSat seems to be a real open hardware project.
Let’s have a quick overview of the UPSat’s subsystems:
- Electrical Power Subsystem EPS: This subsystem controls the CubeSat’s electrical power. UPSat is powered by 7 PV solar cells and 3 Li-Po rechargeable batteries (3.7V, 4Ah).
- Image Acquisition Component IAC: The goal of the IAC is to shoot relatively good quality images pointing down to the Earth. IAC consists of a linux embedded board( DART4460 running OpenWRT), and a USB camera Ximea MU9PM-MH with attached lens.
- Attitude Determination and Control Subsystem ADCS: The ADCS is armed with 3-axis digital gyroscope, magnetometer, Sun Tracker’s pointing vector GPS and Magneto-Torquers. This subsystem is responsible for stabilization of the cube satellite and orienting it in the desired direction.
- On Board Computer subsystem OBC: The brain of the satellite for decision making and monitoring of all subsystems. It’s based on STM32F4 microcontroller and uses FreeRTOS firmware.
- Communications Subsystem COMMS: It’s based on CC1120, the TI’s High-Performance RF Transceiver. Because of the low current consumption, the success of employing it in previous missions and other couple of reasons, the folks behind this project selected CC1120 among the others.
The project is completely open-Hardware and even the UPSat’s structure design files are available.