Fault Detection, Isolation and Correction in GPS/GLONASS Receivers

Dmitry Kinkulkin

Abstract:	The combined use of GPS and GLONASS results in an increase of coordinate accuracy. At the same time the integrity of navigation using GLONASS is urgent. The large computational demand when processing measurements from two systems and the GLONASS accuracy uncertainty lead to some problems with fault detection, isolation and correction (FDIC) algorithm development. This paper describes the recursive FDIC algorithm which is able to detect and correct multiple anomalous errors without any sorting. The component-wise fault detection method, sufficiently exceeding an ordinary chi-square statistics method, is presented. To correct detected faults, correction formulas which avoid repeated position computation have been derived. The analysis of FDIC performance and availability simulation results for real GLONASS accuracy are also presented. The application of the proposed solutions in an Ashtech GG24 GPS+GLONASSÔ receiver provides coordinate output at 5 Hz even under the presence of anomalous errors.
Published in:	Proceedings of the 10th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1997) September 16 - 19, 1997 Kansas City, MO
Pages:	459 - 464
Cite this article:	Kinkulkin, Dmitry, "Fault Detection, Isolation and Correction in GPS/GLONASS Receivers," Proceedings of the 10th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1997), Kansas City, MO, September 1997, pp. 459-464.
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