Earth rotation observations and their geophysical implications.

Details Earth rotation observations and their geophysical implications. Earth rotation observations and their geophysical implications.

Dec 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997babel.156...89p&link_type=abstract

Bulletin Astronomique de Belgrade, No. 156, p. 89 - 108

Astronomy and Astrophysics

Astronomy

1

Earth Rotation: Variations, Earth: Nutation, Earth: Precession

Scientific paper

This paper reviews the precision of the measurements of the Earth rotation fluctuations realized during the last decades; particularly the observation performed during the last ten years allow to constrain theoretical Earth models, which include mantle inelasticity and normal mode resonances, with realistic parameters such as the dynamical flattening of the Earth in agreement with the observed Free Core Nutation (FCN), the observed degree 2 of the geoid (J2) and the observed precession constant. The precision obtained nowadays by the observations requires to take into account the effects of the atmosphere and oceans on nutations and precession. The contributions of the world GPS tracking network to classical geodesy and short term Earth rotation variations are also reviewed.

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