Re: [LEAPSECS] Mechanism to provide tai-utc.dat locally

From: Steve Allen <sla_at_UCOLICK.ORG>
Date: Fri, 29 Dec 2006 00:05:44 -0800

On Fri 2006-12-29T07:43:56 +0000, Tony Finch hath writ:
> Astronomers still count Julian
> years (365.25 days instead of exact years) when dealing with long MJD
> intervals.

Such intervals are almost always expressed in the IAU's time scale of
Terrestrial Time (TT) which is taken to be a more uniform measure than
any practically available time scale, including TAI. As such it is a
simplification for the sake of human cognition that comes close to the
notion of year without any intent to match observable or political

Steve Allen                 <>                WGS-84 (GPS)
UCO/Lick Observatory        Natural Sciences II, Room 165    Lat  +36.99858
University of California    Voice: +1 831 459 3046           Lng -122.06014
Santa Cruz, CA 95064     Hgt +250 m
Received on Fri Dec 29 2006 - 00:06:43 PST

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