The presence of the detectors on the GPS constellation doesn't have anything to do with their GPS systems and functions. They're just a well-managed constellat

The presence of the detectors on the GPS constellation doesn't have anything to do with their GPS systems and functions. They're just a well-managed constellation with good coverage to hitch a ride upon. The ability to do localized surface jamming of GPS should have no effect on this function. There is an entirely separate uplink/downlink channel for satellite control. I don't know what the current generation of NUDET detectors are like, but in the early generations of satellites (pre-GPS) they were optical.