Treatment of Cycle Slips in Navigation Reference Systems

Brian Bohenek and Robert Riggins

Abstract:	For the U. S. Air Force to maintain an accurate and reliable Navigation Reference System (NRS) with Carrier-Phase Global Positioning System (CPGPS) measurements, it must develop an accurate and robust NRS in the face of cycle slips caused by highly dynamic maneuvers. This reaenrch investigates the implementation of double differencing between receivers and between satellites to improve the accuracy of current NRS models. The double differencing implemented showed improvement in the accuracy of the NRS as compared to a single difference implementation. An investigation of two Failure Detection, Isolation, and Recovery (FDIR) algorithms for large cycle slip failures is conducted. The two FDIR techniques are the Chi- Square test and a Multiple Model Adaptive Estimator (MMAE). The FDIR investigation shows that a Chi- Square test as a stand-alone algorithm can work accurately for detection and isolation of failures with an accurate and reliable recovery algorithm. The MMAE algorithm is the best FDIR technique to handle single and multiple cycle slips accurately and reliably.
Published in:	Proceedings of the 51st Annual Meeting of The Institute of Navigation (1995) June 5 - 7, 1995 Antlers Doubletree Hotel Colorado Springs, CO
Pages:	325 - 332
Cite this article:	Bohenek, Brian, Riggins, Robert, "Treatment of Cycle Slips in Navigation Reference Systems," Proceedings of the 51st Annual Meeting of The Institute of Navigation (1995), Colorado Springs, CO, June 1995, pp. 325-332.
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