I think the most common interpretation is that the first standard deviation of the error is 10ns.
But many times this applies only after you have applied a correction based on the sawtooth function and the cable lengths And even then only with a clear view of the sky and a correct antenna. On Sun, Feb 16, 2014 at 11:55 AM, Jimmy D. Burrell <[email protected]>wrote: > I've looked at several different manufacturer GPS datasheets now regarding > the 1 PPS output in an attempt to compare apples to apples. Some of them > rate their 1 PPS output as something on the order of "PPS signals have an > accuracy ranging 10ns" which seems ambiguous. Does that mean the leading > edge of their 1PPS is within 10ns of the GPS clock? Or simply that the > stability of their 1 PPS is within 10ns? Or both? > > Perhaps there's an industry standard for these specs of which I'm unaware? > > The datasheet for my (presumably much older) Globalsat ER-102 seems, to me > at least, to be much more clear stating "time reference at the pulse > leading edge aligned to GPS sec., +/- 1 us". Which I interpret as the > leading edge of my receiver's 1PPS is aligned with the GPS's clock to > within +/- 1 us. > > Jim... > N5SPE > _______________________________________________ > 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. > -- 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.
