Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005hia....13..610l&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
Earth Rotation, Precession, Nutation
Scientific paper
In the framework of the recent implementation of the IAU2000 precession-nutation model it has become necessary to compute all the effects of which amplitudes are of the order of tenths of microarcseconds. Variations in the Earth's rotation rate due to zonal tides are well known and a model is provided by the IERS. However in the dynamical equations of the Earth rotation the coupling between the axial component of the instantaneous vector of rotation and its equatorial component is generally neglected and therefore the effects of this coupling are not considered. In this study different approaches for computing the coupling between the effects of zonal tides in the Earth's rotation rate and nutation are intercompared. A model for these effects is proposed.
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