[Czarnian]

You think that's expensive, think of all the military gps units that would need to be replaced. Do you have any idea how much one military-grade gps unit costs? Probably more than all the civilian gps units on your whole block combined. And just about every military vehicle in production has at least one. Aircraft have 2-3. Then there are the commercial gps units in airplanes, which also have redundancy requirements.

There is no chance that LightSquared will get their way. The cost to the military (taxpayers) would be stupendous.

[kronusaturn]

I would assume that part of the reason military units are so expensive is that they already have high quality RF filters for jamming resistance.

[CamperBob]

Such filters would be of no use against deliberate in-band interference.