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Local Geometric and Gravimetric Datum and Its Relation to the Global Terrestrial Reference System

Published online by Cambridge University Press:  12 April 2016

R. Kelm
R. Kelm*
Affiliation:
Deutsches Geodätisches Forschungsinstitut, Abt. I Marstallplatz 8, D-8000, München 22

Abstract

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In active tectonic zones relative earth surface displacements of mm-order and, relative gravity disturbances of 0.1 mgal size may be expected between two survey epochs. To monitor and separate these small effects significantly special local free networks have to be designed which are measured by relative observations of highest accuracy (mm-and ygal-level). For the connection of the local nets to a global terrestrial reference system a suitable local datum for point coordinates (geometric datum) and gravity field parameters (gravimetric datum) has to be defined within the terrestrial reference system.

Type
Research Article
Information
International Astronomical Union Colloquium , Volume 56: Reference Coordinate Systems for Earth Dynamics , August 1980 , pp. 225 - 228
Copyright
Copyright © Reidel 1981

References

Moritz, H. (1979), “Concepts in Geodetic Reference Frames”, Dept. of Geod. Sci. Rep. 294, Ohio State University, Columbus Google Scholar