[EMAIL PROTECTED] wrote... > Richard Eich wrote: > > If I were to set up five or six global locations, each time- > > synchronized to a local GPS receiver, how much variability would I > > expect there to be between the time as indicated by the GPS > > satellites used by each local GPS receiver. > > > > I'm happy to click on a link and do my own reading. Just haven't > > been able to find the right link yet (still looking, though). > > > > Thx > > If you are using a GPS TIMING receiver with PPS output, the leading edge > of the PPS signal should be within about 50 nanoseconds of UTC. How > accurately your computer can read that PPS signal is another story. > Note that is extremely important to use a receiver designed for timing > service; navigation receivers are optimized for navigation rather than > timing.
That's an important thing to know and keep in mind...thank you. > I have experience with only one such receiver, the Motorola Oncore > M12+T. I use it with a Sun Ultra 10 Workstation and Solaris 8. I get > microsecond accuracy. YMMV > > It should not matter which satellites your site is using, they all keep > the same time to within nanoseconds! Since we're looking for 0.500us accuracy, it sounds like we're in pretty good shape from the GPS sats to the GPS receiver. _______________________________________________ questions mailing list [email protected] https://lists.ntp.isc.org/mailman/listinfo/questions
