Augustine wrote: > On Mar 9, 4:23 pm, "Richard B. Gilbert" <[email protected]> > wrote: >> Just about any GPS timing receiver is accurate to within about 50 >> nanoseconds using the PPS signal. > > Just wondering, does one need to consider the delay that the signal > takes to reach the receiver from the satellite? > > TIA >
There are FOUR satellites involved. The receiver solves a system of four simultaneous equations in four unknowns to obtain: latitude, longitude, elevation, and time. Timing receivers are frequently able to "lock in" the location and these can get along with a single satellite once they have determined their location. Since there are usually seven to nine satellites visible, some timing receivers use something called TRAIM to cross check. See; e.g. the manual for the Motorola Oncore M12+T for the sordid details _______________________________________________ questions mailing list [email protected] https://lists.ntp.org/mailman/listinfo/questions
