But there's now glonass (russian gps) and galileo (eu gps) and I just learned that India and Japan have systems. I want my receivers to use as many of those as

But there's now glonass (russian gps) and galileo (eu gps) and I just learned that India and Japan have systems. I want my receivers to use as many of those as possible. they can go out and be spoofed and when the next big one comes, who knows what will be working.