3U3 CubeSat Electronics Designs to Study Oxygen Upwelling in the Cusp

3U3 is a 3U CubeSat project that involves graduate and undergraduate students at Sonoma State University, the University of New Hampshire, and Howard University. Each university will be building their own Cubesat. 3U3s objective is to explore the Earths magnetospheric-ionospheric processes, and particle precipitation around the cusp region, and how they react to solar winds to cause atmospheric oxygen upwelling. NASA is funding the 3U3 project as a part of the IMAP Student Collaboration. The two instruments that will be used to observe and characterize the neutral oxygen density and precipitating electrons in the cusp will be the UV-Photomultiplier Tube (UV-PMT) and the Electron Retarding Potential Analyzer (ERPA). Both of these instruments have been built at the University of New Hampshire and flown on the RENU II sounding rocket. The ERPA will be responsible for measuring suprathermal electrons, while the UV-PMT will be responsible for characterizing UV from neutral atomic oxygen above 300km. This presentation focuses on the current design for the bus and instrument electronics. The CubeSats for 3U3 are planned to be launched in 2024-2025.