Advanced Fault Detection and Exclusion with Future GNSS Constellations

Shih-Yih (Ryan) Young and Mahesh Surathu

Abstract:	The Global Navigation Satellite System (GNSS) will have significantly improved navigation capabilities in the 2025 time frame. This major improvement primarily results from the availability of multi-frequency civil signals and a much larger number of navigation satellites from multiple constellations. This enhanced future capability coupled with advanced integrity algorithms can enable GNSS receivers to serve as primary means of navigation worldwide. However, these new GNSS constellations require the use of new measurement error models for which traditional integrity algorithms were not designed. Thus, there is a need to revise the traditional integrity algorithms to accommodate the new measurement error models. Several advanced integrity algorithms based on the Solution Separation method have been published. In this paper, we propose an Advanced Fault Detection and Exclusion algorithm that is based on the parity space method and is more computationally efficient than Solution Separation-based methods. The computation of the fault detection threshold, the vertical protection level (VPL), the vertical uncertainty level (VUL) is also discussed. In addition, the global fault detection availability data for these two different integrity methods—the Solution Separation-based method and the proposed parity space-based method—are presented for LPV-200 flight operations.
Published in:	Proceedings of the 25th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS 2012) September 17 - 21, 2012 Nashville Convention Center, Nashville, Tennessee Nashville, TN
Pages:	2758 - 2769
Cite this article:	Young, Shih-Yih (Ryan), Surathu, Mahesh, "Advanced Fault Detection and Exclusion with Future GNSS Constellations," Proceedings of the 25th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS 2012), Nashville, TN, September 2012, pp. 2758-2769.
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