Thermal subsystem

The temperature of YPSat is controlled by a passive thermal control system. This entails a Multi-Layer Isolation (MLI) around YPSat which balances the radiated and absorbed heat and gives a shiny look to the YPSat. It consists of nine layers, including copper, aluminium, Nomex and aluminised Mylar layers. A critical component which must stay well preserved during flight is the On-Board Computer (OBC). This component has an additional form of thermal protection, Docosane Phase Change Material (PCM). As the satellite’s internal energy increases, this substance melts and absorbs the unwanted thermal energy, allowing the OBC to adequately operate.