Earth orientation catalogue - and improved reference frame

Details Earth orientation catalogue - and improved reference frame Earth orientation catalogue - and improved reference frame

Jan 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005hia....13..606v&link_type=abstract

In: Highlights of Astronomy, Vol. 13, as presented at the XXVth General Assembly of the IAU - 2003 [Sydney, Australia, 13 - 26 J

Astronomy and Astrophysics

Astronomy

International Celestial Reference System

Scientific paper

Optical observations of latitude/universal time variations of nearly five thousand stars (made during the twentieth century at 33 observatories in Earth orientation programmes) are used in combination with the Hipparcos and Tycho Catalogues and their combination with ground-based observations (ARIHIP) to derive a new improved star catalogue called Earth Orientation Catalogue (EOC). The improved proper motions and/or positions of those stars that are not marked in ARIHIP by Wielen et al. as 'astronomically excellent' are more convenient for long-term extrapolation of apparent places than those of the original Hipparcos or Tycho Catalogue. The catalogue EOC is planned to be used for another new re-analysis of Earth orientation parameters based on optical astrometry observations.

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