Relativity matters in GNSS in general, but it doesn't really matter for the issue of spoof detection; relativistic effects would be solved for by both the attacker and receiver. There's no uncertainty in them.
Relativistic effects dictate that it is impossible to distinguish changes in relative time and changes in relative position.
Because of relativity you cannot use local time to estimate remote time, and hence you cannot use local time to make the difference between time spoofing and location changes.
Comments
Relativity matters in GNSS in general, but it doesn't really matter for the issue of spoof detection; relativistic effects would be solved for by both the attacker and receiver. There's no uncertainty in them.
Relativistic effects dictate that it is impossible to distinguish changes in relative time and changes in relative position.
Because of relativity you cannot use local time to estimate remote time, and hence you cannot use local time to make the difference between time spoofing and location changes.
You've lost me.