Title:

Attitude Determination and Control System of a 3U Cube Satellite

The 3UCubed project is a collaborative effort between the University of New Hampshire, Howard University, and Sonoma State University as a part of NASA’s IMAP student Collaboration. This project will result in one 3U Cube Satellite set to be launched in 2025. The mission goal of 3UCubed is to better understand how Earth’s polar upper atmosphere responds to particle precipitation and varying conditions associated with solar wind forcing and internal magnetospheric processes. The achieve the mission goal, the satellite will be nadir (Earth) pointed with two science instruments pointing within ±10o with respect to the magnetic field lines. To ensure this, the spacecraft will be equipped with an attitude determination and control system (ADCS) to control and stabilize its attitude. The ADCS chosen for this mission is the Gen1 CubeADCS developed by CubeSpace Satellite Systems—a 3-Axis stabilized system with three magnetic torquers and one Y-momentum wheel. The ADCS will go through a sequence of control and estimation modes to detumble the satellite, before reaching and maintaining a stabilized state. This sequence is being optimized based on data from EOS to ensure optimal ADCS performance for this mission.

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