Dilution of Precision Factor in Medium Earth Orbit Search and Rescue Systems

Richard Paiement, Mario Caron, Xiaobin Tang

Abstract:	This paper presents mathematical formulations of the dilution of precision (DOP) metric for use in satellitebased search and rescue systems such as Cospas-Sarsat, and specifically for its planned medium Earth orbit (MEO) enhancement. The DOP formulations are given for two geolocation techniques, time difference of arrival (TDOA) and frequency difference of arrival (FDOA), as well as their combination. We also describe a software tool which implements these DOP formulations for analysis of the geometric impact of satellite constellations on geolocation estimation accuracy.
Published in:	Proceedings of the 21st International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS 2008) September 16 - 19, 2008 Savannah International Convention Center Savannah, GA
Pages:	2700 - 2705
Cite this article:	Paiement, Richard, Caron, Mario, Tang, Xiaobin, "Dilution of Precision Factor in Medium Earth Orbit Search and Rescue Systems," Proceedings of the 21st International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS 2008), Savannah, GA, September 2008, pp. 2700-2705.
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