Re: [LEAPSECS] Telescope pointing and UTC

From: Steve Allen <sla_at_ucolick.org>
Date: Thu, 30 Jan 2003 16:25:22 -0800

On Thu 2003-01-30T17:04:30 -0700, Neal McBurnett hath writ:
> I searched the IAU web site, and the Astrometry commission at
> http://center.shao.ac.cn/IAU_COM8/ and found no reference to recent
> action. Can you send a pointer with more specifics?
>
> I think sending it to the whole list would be helpful.

The resolutions that have established the change have happened over
the past four meetings of IAU General Assembly.

The most recent set of resolutions which switched things from the old,
non-inertial definitions to the new ones is visible at
http://danof.obspm.fr/IAU_resolutions/Resol-UAI.htm
Note the many instances of the date 1 January 2003.

Some resolutions before that are at
http://danof.obspm.fr/t5nwslt1.html

Some generally useful links

about ICRS
http://hpiers.obspm.fr/webiers/results/icrf/Icrs.html

about ICRF
http://www.iers.org/iers/products/icrf/
http://hpiers.obspm.fr/icrs-pc/

about HCRF
http://astro.estec.esa.nl/Hipparcos/catalog.html

about ITRS
http://www.iers.org/iers/earth/itrs/itrs.html

about ITRF
http://www.iers.org/iers/products/itrf/
http://lareg.ensg.ign.fr/ITRF/

--
Steve Allen          UCO/Lick Observatory       Santa Cruz, CA 95064
sla_at_ucolick.org      Voice: +1 831 459 3046     http://www.ucolick.org/~sla
PGP: 1024/E46978C5   F6 78 D1 10 62 94 8F 2E    49 89 0E FE 26 B4 14 93

Received on Thu Jan 30 2003 - 16:25:37 PST