[time-nuts] M12+T sawtooth correction and additional filtering
Poul-Henning Kamp
phk at phk.freebsd.dk
Wed May 9 05:47:19 UTC 2012
In message <4EBB3F0321D24025B6BA3F4AA81B5134 at pc52>, "Tom Van Baak" writes:
>As long as you're playing with @@Hn messages, Kalman filters,
>and software sawtooth correction, you might want to consider
>looking at the per-SV "fractional GPS local time estimates" in the
>Hn message. It's the mean of these values that determines the
>virtual 1PPS (= the physical 1PPS + sawtooth correction).
See also:
http://phk.freebsd.dk/raga/sneak/
--
Poul-Henning Kamp | UNIX since Zilog Zeus 3.20
phk at FreeBSD.ORG | TCP/IP since RFC 956
FreeBSD committer | BSD since 4.3-tahoe
Never attribute to malice what can adequately be explained by incompetence.
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