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Relativistic effects in geodynamics(*)

Published online by Cambridge University Press:  04 August 2017

C. Boucher
C. Boucher*
Affiliation:
Institut Géographique National, 2, Avenue Pasteur, 94160 Saint-Mandé, France

Abstract

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Geodesy has now reached such an accuracy in both measuring and modelling that time variations of the size, shape and gravity field of the Earth must be basically considered under the name of Geodynamics. The objective is therefore the description of point positions and gravity field functions in a terrestrial reference frame, together with their time variations.

For this purpose, relativistic effects must be taken into account in models. Currently viable theories of gravitation such as Einstein's General Relativity can be expressed in the solar system into the parametrized post-newtonian (PPN) formalism. Basic problems such as the motion of a test particle give a satisfactory answer to the relativistic modelling in Geodynamics.

The relativistic effects occur in the definition of a terrestrial reference frame and gravity field. They also appear widely into terrestrial (gravimetry, inertial techniques) and space (satellite laser, Lunar laser, VLBI, satellite radioelectric tracking …) measurements.

Type
Relativistic Effects Near the Earth
Information
Symposium - International Astronomical Union , Volume 114: Relativity in Celestial Mechanics and Astrometry , 1986 , pp. 241 - 253
Copyright
Copyright © Reidel 1986 

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* This paper was not formally presented during the symposium because the author was unable to attend due to visa problems.Google Scholar