[time-nuts] Comparing GPS receivers

Poul-Henning Kamp phk at phk.freebsd.dk
Mon Jan 10 01:21:29 EST 2005


In message <003601c4f6aa$b5a9e4e0$f212f204 at computer>, "Tom Van Baak" writes:

>The behavior of a GPS receiver is mostly revealed
>within a few hours; I don't think a longer integration
>time buys you much. I mean, if your GPS receiver
>1 PPS wanders by 50 ns over a few hours it will also
>show wandering by 50 ns over a day, or a month,
>or year.

I would say "a few days" since there can be a diurnal systematic
oscillation due to orbital mechanics and local multipathing.

-- 
Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
phk at FreeBSD.ORG         | TCP/IP since RFC 956
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