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Origin and Scale of Coordinate Systems in Satellite Geodesy

Published online by Cambridge University Press:  12 April 2016

J. B. Zieliński
J. B. Zieliński*
Affiliation:
Department of Planetary Geodesy, Space Research Centre, Polish Academy of Sciences, Warsaw, Poland

Abstract

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The center of mass of the Earth is commonly taken as origin for the coordinate systems used in satellite geodesy. In this paper the notion of the “geocenter” is discussed from the point of view of mechanics and geophysics. It is shown that processes in and above the crust have practically no impact on the position of the geocenter. It is possible however that motions of the inner core may cause variations of the geocenter of the order of 1 m. Nevertheless the geocenter is the best point for the origin of a coordinate system. Mather’s method of monitoring geocenter motion is discussed, and some other possibilities are mentioned. Concerning the scale problem, the role of the constant GM and time measurements in satellite net determinations are briefly discussed.

Type
Research Article
Information
International Astronomical Union Colloquium , Volume 56: Reference Coordinate Systems for Earth Dynamics , August 1980 , pp. 239 - 250
Copyright
Copyright © Reidel 1981

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