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Earth Rotation in the Hipparcos Reference Frame

Published online by Cambridge University Press:  12 April 2016

J. Vondrák ,
C. Ron  and
I. Pešek
J. Vondrák
Affiliation:
Astronomical Institute, Czech Academy of Sciences Praha, Czech Republic
C. Ron
Affiliation:
Astronomical Institute, Czech Academy of Sciences Praha, Czech Republic
I. Pešek
Affiliation:
Astronomical Observatory, Czech Technical University Praha, Czech Republic

Abstract

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New determination of the Earth orientation parameters (EOP), based on optical astrometry observations since the beginning of the century, is now under preparation by the Working group established by Commission 19 of the IAU. The Hipparcos catalog is to define the celestial reference frame in which the new series of EOP are to be described. The novelties of the prepared solution are the higher resolution (5 days) and more parameters estimated from the solution (celestial pole offsets, rheological parameters of the Earth, certain instrumental constants). The mathematical model of the solution is described, and the results based on the observations made with 46 instruments at 29 observatories and a preliminary Hipparcos catalog are presented.

Type
Dynamics and Astrometry: Present and Future
Information
International Astronomical Union Colloquium , Volume 165: Dynamics and Astrometry of Natural and Artificial Celestial Bodies , 1997 , pp. 115 - 122
Copyright
Copyright © Kluwer 1997

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