[time-nuts] GPS accuracy specs

Richard H McCorkle mccorkle at ptialaska.net
Sun Feb 16 21:03:47 UTC 2014


Jim,

Generally Navigation receivers






> 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 -- time-nuts at febo.com
> To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> and follow the instructions there.
>





More information about the Time-nuts_lists.febo.com mailing list