Use Cases for Spaceborne PRS-Receivers

In the “Spaceborne Monitoring of GNSS Signal Interference (MOGSI)” project, a satellite payload consisting of two modules is to be demonstrated and tested in the laboratory. One module will provide the capability to detect GNSS jamming events, and the other module will enable a secure position and time determination for governmental authorized users of the Public Regulated Service (PRS) of Galileo. In the first phase of the project, interviews with satellite manufacturers, operators, and research institutions were conducted to support the use case analysis for a space grade PRS receiver. The interviews focused on the current usage of GNSS receivers in space and potential future applications. In addition, the presence of interference-, jamming- and spoofing-signals in orbit was investigated to assess the demand for a secure GNSS signal like PRS. The results of this survey were considered in the system design of the MOGSI PRS space receiver. Finally, an outline on future project activities will be given.