[-- Attachment #1: Type: text/plain, Size: 235 bytes --] > 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 [-- Attachment #2: Type: text/plain, Size: 141 bytes --] _______________________________________________ COFF mailing list COFF@minnie.tuhs.org https://minnie.tuhs.org/cgi-bin/mailman/listinfo/coff
[-- Attachment #1.1: Type: text/plain, Size: 681 bytes --] 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@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@minnie.tuhs.org https://minnie.tuhs.org/cgi-bin/mailman/listinfo/coff [-- Attachment #1.2: Type: text/html, Size: 1601 bytes --] [-- Attachment #2: Type: text/plain, Size: 141 bytes --] _______________________________________________ COFF mailing list COFF@minnie.tuhs.org https://minnie.tuhs.org/cgi-bin/mailman/listinfo/coff
[-- Attachment #1.1: Type: text/plain, Size: 1127 bytes --] On Wed, Sep 8, 2021, 7:34 PM Adam Thornton <athornton@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@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@minnie.tuhs.org > https://minnie.tuhs.org/cgi-bin/mailman/listinfo/coff > > > _______________________________________________ > COFF mailing list > COFF@minnie.tuhs.org > https://minnie.tuhs.org/cgi-bin/mailman/listinfo/coff > [-- Attachment #1.2: Type: text/html, Size: 2781 bytes --] [-- Attachment #2: Type: text/plain, Size: 141 bytes --] _______________________________________________ COFF mailing list COFF@minnie.tuhs.org https://minnie.tuhs.org/cgi-bin/mailman/listinfo/coff