9 Sep
2021
9 Sep
'21
1:22 a.m.
Ah, leap seconds. I work for an observatory. Some
things are in TAI
and some are in UTC. At least now I know what to look for when
something is 37 seconds off.
Isn't about that the transit of the Moon or something?
-- Dave
9 Sep
9 Sep
1:34 a.m.
New subject: What does your "cal" show? (fwd)
Just variation of Earth’s rotational speed over time, AFAIK.
http://leapsecond.com/java/gpsclock.htm -- TAI is SI second ticks, UTC is
corrected to rotation by leap seconds. Currently they are 37 seconds apart.
Adam
On Sep 8, 2021, at 6:22 PM, Dave Horsfall <dave(a)horsfall.org> wrote:
Ah, leap seconds. I work for an observatory. Some things are in TAI and
some are in UTC. At least now I know what to look for when something is 37
seconds off.
Isn't about that the transit of the Moon or something?
-- Dave_______________________________________________
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1:47 a.m.
New subject: What does your "cal" show? (fwd)
On Wed, Sep 8, 2021, 7:34 PM Adam Thornton <athornton(a)gmail.com> wrote:
Just variation of Earth’s rotational speed over time,
AFAIK.
http://leapsecond.com/java/gpsclock.htm -- TAI is SI second ticks, UTC is
corrected to rotation by leap seconds. Currently they are 37 seconds apart.
UTC is also SI seconds with an extra second inserted so celestial mean noon
doesn't drift. It's irregular as to when based on the irregular wobble of
the earth.
Warner
Adam
On Sep 8, 2021, at 6:22 PM, Dave Horsfall <dave(a)horsfall.org> wrote:
Ah, leap seconds. I work for an observatory. Some things are in TAI and
some are in UTC. At least now I know what to look for when something is 37
seconds off.
Isn't about that the transit of the Moon or something?
-- Dave_______________________________________________
COFF mailing list
COFF(a)minnie.tuhs.org
https://minnie.tuhs.org/cgi-bin/mailman/listinfo/coff
_______________________________________________
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2 comments
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participants (3)
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Adam Thornton -
Dave Horsfall -
Warner Losh