The BBC News article Study maps 'extensive Russian GPS spoofing' says:
(GPS spoofing) involves the state using strong radio signals to drown out reliable navigation data, says non-profit C4ADS.
The report by the think tank documents almost 10,000 separate GPS spoofing incidents conducted by Russia.
Most incidents affected ships, said C4ADS, but spoofing was also seen around airports and other locations.
C4ADS, or the Centre for Advanced Defence, is a research organisation that uses sophisticated data analysis techniques to investigate global security and conflict issues.
Its report drew on more than 12 months of work analysing Global Navigation Satellite Systems (GNSS) positioning data taken from several sources. These included:
- automatic route logging systems on ships
- low-earth satellite signals
- route histories taken from users of the Strava exercise app
- public reports of vessels, aircraft and vehicles going off course
The analysis showed Russia was "pioneering" the use of GPS spoofing techniques to "protect and promote its strategic interests", the report said.
Generally, said the research group, the spoofing was being done to deflect commercial drones from entering sensitive airspace.
The spoofing was concentrated around 10 key locations including the Crimea, Syria, as well as ports and airports in Russia.
Question: Does GPS spoofing ever come from space? A directional antenna system, or three antennas + three receivers could probably work out the direction of the incoming signal, but is this really how spoofings are detected?
Possibly related (I can't tell) GPS Receiver Autonomous Integrity Monitoring (RAIM) - parity space method