A Study of DMA's Prediction Accuracy on Earth Orientation Parameters

Peter Dumian Kopchu and Boudewijn H. W. van Gelder

Abstract:	The Defense Mapping Agency (DMA), in coordination with the United States Naval Observatory (USNO), is responsible for providing the Department of Defense with accurate Earth Orientation Parameter Prediction (EOPP) coefficients on a weekly basis. Among the customers of the DMA Earth orientation coefficients is the GPS Master Control Station (GPSMCS). The GPSMCS uses these DMA predictions to generate the integrated GPS reference trajectories which are needed in the real-time orbit estimation process. A comprehensive analysis of the EOPP’s accuracy against the International Earth Rotation Service’s (IBRS) final values show that the predictions exceed the requirements defined in interface control document ICD-GPS-2 11. Also, tests incorporating the use of IBRS predictions and a zonal Earth tide model reveal some possibilities on improving the accuracy of the EOPPs.
Published in:	Proceedings of the 9th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1996) September 17 - 20, 1996 Kansas City, MO
Pages:	1233 - 1241
Cite this article:	Kopchu, Peter Dumian, van Gelder, Boudewijn H. W., "A Study of DMA's Prediction Accuracy on Earth Orientation Parameters," Proceedings of the 9th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1996), Kansas City, MO, September 1996, pp. 1233-1241.
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