Error Budget for the DMA GPS Geodetic Point Positioning Algorithm Through Monte Carlo Simulatiori

Stephen Malys, Dennis Bredthauer, and Stephen G. Deweese

Abstract:	The Defense Mapping Agency (DMA) has developed an algorithm which produces a solitary WGS 84 geodetic point position from a few hours of dual-frequency GPS tracking data collected at a stationary location. Several previous studies of empirical results from this algorithm, while using the DMA ‘precise’ ephemerides, have demonstrated routine precision lcvcls of approximately 1 meter (lo) in each component. By using a combination of pure synthetic data and individually-imposed error sources, the study presented here attempts to establish a comprehensive error budget for the DMA point positioning technique. Where appropriate, each error source’s affect on an estimated point position is characterized and quantified through a ‘Monte Carlo’ technique. All known error sources are evaluated over a realistic range of controlled error levels. The predominant error sources affecting the DMA GPS geodetic point positioning process were found to be radial satellite ephemeris errors, satellite clock state errors and receiver clock drift. The error budget is prioritized and analyzed for areas of potential improvements.
Published in:	Proceedings of the 6th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1993) September 22 - 24, 1993 Salt Palace Convention Center Salt Lake City, UT
Pages:	1093 - 1106
Cite this article:	Malys, Stephen, Bredthauer, Dennis, Deweese, Stephen G., "Error Budget for the DMA GPS Geodetic Point Positioning Algorithm Through Monte Carlo Simulatiori," Proceedings of the 6th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1993), Salt Lake City, UT, September 1993, pp. 1093-1106.
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