[time-nuts] LORAN C shutdown
Poul-Henning Kamp
phk at phk.freebsd.dk
Tue Nov 10 22:00:35 UTC 2009
In message <2455.41.130.184.218.1257890017.squirrel at webmail.lysator.liu.se>, bg
@lysator.liu.se writes:
>High performance mechanical rotating gyros are associated with platform
>systems. Ring laser gyros and fiber optic gyros are typically strapdown,
>which completely dominate modern navigation.
Actually, they are usually strapped down to a deliberately moving
platform to avoid mode-lock-in at the mirrors, which produces a
"sticky" or "discrete steps" effect at slow rates of rotation.
But that is a minor detail.
Poul-Henning
--
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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