ARAIM Integrity Risk Allocation Over Time

Jingtian Du, Zhipeng Wang, Kun Fang, Yanbo Zhu, Zhiqiang Dan, Hongxia Wang, Xiao Li

Peer Reviewed

Abstract:	The integrity risk requirements proposed by the ICAO for GNSS aviation applications in different operation stages are difficult to directly apply to a snapshot ARAIM user algorithm directly. To reduce the conservativeness introduced by the process of integrity risk mapping, the paper proposes a method to allocate the integrity risk requirement over an operation exposure time. A strict definition of ARAIM integrity risk over an operation exposure time is introduced. The functional relationship between the integrity risk over the exposure period and the protection levels of each epoch is derived based on a first-order Gauss–Markov process. A real-time protection level calculation method for ARAIM is proposed. The results of the performance simulation show that the proposed method can meet 99.9% RNP 0.1 global availability 100% coverage.
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:	2718 - 2728
Cite this article:	Du, Jingtian, Wang, Zhipeng, Fang, Kun, Zhu, Yanbo, Dan, Zhiqiang, Wang, Hongxia, Li, Xiao, "ARAIM Integrity Risk Allocation Over Time," Proceedings of the 35th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS+ 2022), Denver, Colorado, September 2022, pp. 2718-2728. https://doi.org/10.33012/2022.18515
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