[time-nuts] WWVB BPSK Receiver Project? (fwd)
Poul-Henning Kamp
phk at phk.freebsd.dk
Fri Mar 16 16:27:25 UTC 2012
In message <34C510BB3C6449B89AC4F7FBC20F46DA at vectron.com>, "Bob Camp" writes:
>One assumption is that you will indeed be capturing / averaging for several
>days. I'd include some sort of model for sunrise / sunset shifts (might be
>just "ignore for the next hour").
Some of my best results had 8 buffers each used for 3 hours and
all timenuttery based on 24 hour differences from these buffers.
>Another assumption is that your local reference is close enough and stable
>enough to make a multi day average meaningful.
Well, the above technique got me a new offset estimate every three hours
and that did a pretty good job on both OCXO and Rb disciplining.
--
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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