GNSS Vulnerability Analysis and Assessment

A Global Navigation Satellite System (GNSS) vulnerability assessment approach based on separately detecting possible factors is developed in this paper. The consistency judgment of visible satellites and navigation message, carrier-to-noise ratio (C/No), Satellite Autonomous Integrity Monitoring (SAIM), Receiver Autonomous Integrity Monitoring (RAIM), Ionosphere delay and Receiver's Position error are chosen as key features to detect whether the GNSS vulnerability is serious. By monitoring those key features, potential vulnerability factor can be excluded in steps. This approach is established in clearly elaborating the concept of GNSS vulnerability and fully analyzing the potential vulnerability factors in system segment, environment segment and user segment. A GNSS vulnerability physical simulation, verification and mitigation platform is also designed; the establishment of this platform is a future work to realize this approach and to mitigate the vulnerability while it happens.