We have observed that too many CubeSats have been “DOA” (Dead On Arrival) upon deployment on orbit. With the assistance of AMSAT, a new group embarking on a CubeSat mission would not start with a “real” flight model (FM) structure, but instead learn or “practice” first by producing either an engineering test unit (ETU) or, before that, with this CubeSat Simulator. For this CubeSat mission we have been tasked to build an amateur weather satellite, by integrating various sensors into the Cubesat Simulator