GPS/Galileo "competition"
1.I know of no reason why Galileo should be superior to GPS,and anyrate it doesn't exist yet (just two demonstrators, the cheaper of which was from a UK university and saved the dayfrom losing frquency allocation to comms industry)
2. The benefit comes from combination of both systems(both sides have sworn that they will be mutually compatible).Doubling of number of satelliteswill inprove RNP considerably.
3.FAA have dilly-dallied over back-up. Among candidates are E-Loran (no timing for dreaded bankers), residualATC radar.INS would probably require
calibration, but not everyone has got it.(Litton have done it experimentally)
4.I am not sure Europe can produce thegoods. They havn't yet certified EGNOS, which is little more than a copy ofWAAS,which now is certified for hundreds of runway ends.
Keith