Evaluation of Satellite Clock and Ephemeris Error Bounding Predictability for Integrity Applications

Xinwei Liu, Rebecca Wang, Juan Blanch, Todd Walter

Abstract:	The Advanced Receiver Autonomous Integrity Monitoring (ARAIM) concept requires a conservative characterization of the nominal pseudorange error bounds. This paper explores the behavior of the Gaussian bounding parameters of the user projected clock and ephemeris errors. In a previous study [4], we quantified the inherent uncertainties in the bounding parameters by using the bootstrap probability distributions for the maximum projected clock and ephemeris errors. This paper presents a single set of parameters that captures the inherent variability of the bounding parameters. In addition, we reduce the computational cost by using the direct bounding method. We then partition the data for different observable conditions and examine the differences among the bounding parameters to determine whether the current bounding behavior is representative of future data. Our study shows that the means of the Gaussian bounding are small, most of the standard deviations are below the user range accuracy, and the near-fault data points affect the stability of the bounding parameters for different observable conditions.
Published in:	Proceedings of the 35th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS+ 2022) September 19 - 23, 2022 Hyatt Regency Denver Denver, Colorado
Pages:	34 - 43
Cite this article:	Liu, Xinwei, Wang, Rebecca, Blanch, Juan, Walter, Todd, "Evaluation of Satellite Clock and Ephemeris Error Bounding Predictability for Integrity Applications," Proceedings of the 35th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS+ 2022), Denver, Colorado, September 2022, pp. 34-43. https://doi.org/10.33012/2022.18306
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