With the rising threat from sources that can potentially deny and provide deceptive GNSS service, the possibility of an interference monitoring system on a LEO platform opens up a host of survey and research opportunities. Recent experiments of GNSS radio occultation stationed on the ISS have observed some interesting cases of spoofing and jamming activity. These experiments have demonstrated the capability of a global survey of interference emitters and to perform localization without the need for setting up extensive monitoring stations. Since this experimental setup was optimized primarily to perform radio occultation, a payload specialized for the task of interference monitoring would contribute more significantly in capturing and analysing different terrestrial interference sources. As part of the research project, SeRANIS (Seamless Radio Access Networks for Internet of Space), a surveillance system for monitoring GNSS interferences globally will be deployed onboard among a host of other experimental payloads on a LEO satellite platform. Within the mission, the sensitive detection and characterization of GNSS jamming and spoofing emitters on Earth are one of the scientific experiments, with the aim of demonstrating the capability of georeferencing jamming and spoofing sources. This paper will discuss the work done on some key areas surrounding the development of this payload. Initially, an overview of the experimental setup of the payload is given, highlighting the methodology of interference capture in the L1/L5 band, onboard processing, and data exchange with the ground station. A simulation testbed is designed to evaluate the different scenarios with the Institute’s software-based GNSS signal generator as the core module that can be configured to generate advanced spoofing and jamming attacks and support the high dynamics of a space receiver under realistic channel conditions. In parallel a Matlab based simulation environment is built-up to assess the performance of different geolocalization algorithms by extracting useful signal parameters for georeferencing. One algorithm is introduced which is based on the extracted Doppler time history of the spoofing signal during one overflight and the achievable horizontal accuracies for different emitter locations are shown.    «

With the rising threat from sources that can potentially deny and provide deceptive GNSS service, the possibility of an interference monitoring system on a LEO platform opens up a host of survey and research opportunities. Recent experiments of GNSS radio occultation stationed on the ISS have observed some interesting cases of spoofing and jamming activity. These experiments have demonstrated the capability of a global survey of interference emitters and to perform localization without the n...    »