"Scott Moore" wrote in message ...

Bull****. GPS also works using multiple satellites and multiple frequencies.
If you are going to propose that the entire frequency band for GPS be jammed
or otherwise corrupted, then the same thing would work across the entire
VOR band as well.
Umm, no. GPS, as far as aviation is currently concerned, operates on a single
frequency called L1 (1.57542 GHz). Even if you were to use L2 as well, they aren't redundant.
The reason for the second frequency (civil use) is to allow correction to the ionospheric
propagation delay.

In theory, the spread spectrum nature makes it difficult to jam effetively. Of course, that's
with an ideal reciever. You can knock out a lot of receivers by just throwing enough RF
at them.