Detecting GNSS Jamming and Spoofing on Android Devices

Abstract Global navigation satellite system (GNSS) location engines on Android devices provide and utility to billions of people worldwide. However, these currently have very limited protection from threats their position, navigation, time (PNT) solutions. External sources radio frequency interference (RFI) can render PNT information unusable. Even worse, false signals or spoofing a solution devices. To mitigate this, four detection methods were developed evaluated using native parameters within Android: Comparing the GNSS network locations, checking mock flag, comparing times, observing automatic gain control (AGC) carrier-to-noise density (C/N0) signal metrics. These powerful means significantly increase robustness GNSS-based are implemented in GNSSAlarm application demonstrate real-time jamming detection.