Researchers in Norway conducted a satellite navigation spoofing experiment during the 2024 Jammertest event in Andoya. Over a 40-minute period, the team gradually increased the intensity of fake signals to manipulate the GPS data of a rescue helicopter and a small aircraft.
The spoofing caused the helicopter's navigation system to report that it was flying toward the Norwegian Sea, while the small aircraft appeared to perform impossible maneuvers on monitoring screens. The test demonstrated that devices often fail to detect anomalies when fake data is introduced slowly.
Beyond location data, the study examined the impact of GNSS time synchronization spoofing. By comparing a compromised clock with a fiber-connected reference clock, researchers measured deviations in nanosecond increments, highlighting risks for critical infrastructure like power grids and financial systems.
The experiment emphasized that gradual signal manipulation is more dangerous than total signal loss, as systems may continue to operate on incorrect data without triggering alerts. Experts suggest that relying on a single GNSS source is insufficient for modern infrastructure security.
To mitigate these risks, researchers advocate for redundant systems, including atomic clocks and fiber-based timing technologies like the White Rabbit protocol developed by CERN. The findings underscore the need for diverse, multi-layered navigation and timing architectures.
