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On the Relative Motion of the Earth's Axis of Figure and the Pole of Rotation

Published online by Cambridge University Press:  14 August 2015

Angelo Poma  and
Edoardo Proverbio
Angelo Poma
Affiliation:
Stazione Astronomica Internazionale, Cagliari, Italy and Istituto di Astronomia dell'Università, Cagliari, Italy
Edoardo Proverbio
Affiliation:
Stazione Astronomica Internazionale, Cagliari, Italy and Istituto di Astronomia dell'Università, Cagliari, Italy

Abstract

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The motion of the Earth's axis of inertia has been derived, taking elastic deformation into account, from the polar coordinates determined by the BIH for the period from 1962.0 to 1975.0. Characteristics of the motion of both the pole of inertia and the pole of rotation have been examined. The secular displacement of these poles relative to the pole defined by the low order harmonics C21, S21 determined from observations of satellites seems to confirm that the inertial reference axis has an apparent wandering motion within the deformable Earth.

Type
Part II: Polar Motion
Information
Symposium - International Astronomical Union , Volume 82: Time and the Earth's Rotation , 1979 , pp. 115 - 122
Copyright
Copyright © Reidel 1979 

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