Implementation of the IAU 2000 definition of UT1 in astronomy

Details Implementation of the IAU 2000 definition of UT1 in astronomy Implementation of the IAU 2000 definition of UT1 in astronomy

Nov 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010hia....15..212c&link_type=abstract

Highlights of Astronomy, Volume 15, p. 212-212

Astronomy and Astrophysics

Astronomy

Astrometry, Reference Systems, Time, Earth

Scientific paper

We recall the concepts and nomenclature associated with the IAU 2000 definition of UT1 as function of the Earth rotation angle (ERA). We comment on the complications that arise when UT1 is regarded as both an angle and a time scale. We review the IAU 2006 expressions for the position of the celestial intermediate origin (CIO) and the equation of the origins, and the associated CIO and equinox based procedures for the celestial-to-terrestrial transformation.

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