The PHOENIX satellite is a 2U-Cubesat used for upper atmosphere science and technology demonstrations, and is built by an NCKU team led by Prof. Jyh-Chin Juang and Prof. Jiun-Jih Miau. The team is a part of the QB50 program supported by the European Union’s Seventh Framework Programme for Research and Technical Development directed by the von Karman Institute (VKI). The program obtains muti-point measurements for the upper layers of the atmosphere, the mid-lower thermosphere located between altitudes of 200 km and 400 km, using a constellation of CubeSats.