Microjet, developed by AIG (Aerospace Innovation GmbH) of Berlin, is a modularly designed propulsion system for Nanosatellites and Microsatellites based on the gas-resistojet-concept. It consists of a PST (Pressure Tank Unit) with nitrogen which is filled or drained, respectively, through a FDU (Fill and Drain), a FCU (Flow Control Unit) responsible for the control of correct propellant mass flow, as well as one or more THUs (Thruster Units). Each of these THUs contains a pulse valve and a nozzle for the actual thrust generation. Additionally, according to the definition of the Resistojet-concept, an electrical resistance-heating element might be applied for higher performance demands. The entire propulsion system is controlled by the PCU (Propulsion Control Unit), which can also be resigned of, if the satellite itself is capable to control the Microjet propulsion subsystems.