For testing, I'd assume the gps simulator only needs to be good enough that the receiver will detect the signal. There is some Doppler shift so the receiver must have to look over a wider range of frequencies so if the simulator was inside that range it could work. Light travels at about one foot per nanosecond. so your simulator should need to know the time to within a few tens of nanoseconds. Receivers can deal with not-perfect signal. Multipath and refraction are common.
You GPS simulator would likely have a GPS receiver inside of it and sync to a real GPS. On Thu, Dec 15, 2011 at 9:37 PM, Jim Lux <[email protected]> wrote: > Say you want a quik n easy n cheap GPS simulator to test a GPS timing > receiver. How good does the oscillator (presumably some nice multiple of > the chip rate) have to be? -- Chris Albertson Redondo Beach, California _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
