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Preliminary evaluation of Doppler-determined pole positions computed using World Geodetic System 1984

Published online by Cambridge University Press:  03 August 2017

John A. Bangert  and
James P. Cunningham
John A. Bangert
Affiliation:
Defense Mapping Agency, Washington, DC 20305–3000
James P. Cunningham
Affiliation:
Naval Surface Weapons Center, Dahlgren, VA 22448–5000

Abstract

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Since 1975, the Defense Mapping Agency (DMA) has been determining polar motion as a byproduct of computing the precise orbits of the Navy Navigation Satellite System (NNSS) satellites. The orbit determination process currently incorporates the NSWC 9Z2 terrestrial reference system and the NWL 10E-1 Earth Gravitational Model (EGM) to degree 28 and order 27. The World Geodetic System 1984 (WGS 84), developed by DMA, will replace the NSWC 9Z2/10E-1 system for NNSS orbit determination. The WGS 84 EGM to degree and order 41 will be utilized. This paper presents the results of two experiments which compared pole positions computed in the two systems. These comparisons indicate that use of WGS 84 improves agreement between pole position values resulting from the Nova-class satellite orbit solutions and the values determined by other modern techniques.

Type
II. Terrestrial Reference Systems
Information
Symposium - International Astronomical Union , Volume 128: Earth's Rotation and Reference Frames for Geodesy and Geodynamics , 1988 , pp. 131 - 140
Copyright
Copyright © Reidel 1988 

References

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