A Novel ARAIM Approach in Probability Domain for Combined GPS and Galileo

Liang Li, Lin Zhao, Fuxin Yang, Na Li

Abstract:	Although dual system-based Advanced Receiver Autonomous Integrity Monitoring (ARAIM) in position domain is able to provide worldwide coverage of LPV-200 service, the integrity evaluation is based on a priori fixed allocation of integrity risk requirement, thus is inadequate to cope with any emerging integrity threats. Furthermore, the traditional ARAIM is suffering from the integrity loss due to the integrity evaluation under incomplete fault hypothesis. In this contribution, a new ARAIM algorithm for multiple Global Navigation Satellite Systems (GNSS) is developed in probability domain to release these limitations. In order to accurately evaluate the integrity risk of combined GPS and Galileo and avoid the fixed allocation of integrity risk, ARAIM employs the concept of Probability of Hazardously Misleading Information (PHMI) and is evaluated under complete faults hypothesis by using an overbounding method. Based on the established simulation platform, the performance of the proposed probability domain-based ARAIM has been compared with the traditional position domain-based ARAIM. The result shows that the proposed method is sufficient to provide global LPV-200 service coverage at over 99% of availability. Another interesting result from the simulation reveals that the failure probability of each system should be less than 10-5/hour to support worldwide LPV-200 service.
Published in:	Proceedings of the 28th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS+ 2015) September 14 - 18, 2015 Tampa Convention Center Tampa, Florida
Pages:	649 - 657
Cite this article:	Li, Liang, Zhao, Lin, Yang, Fuxin, Li, Na, "A Novel ARAIM Approach in Probability Domain for Combined GPS and Galileo," Proceedings of the 28th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS+ 2015), Tampa, Florida, September 2015, pp. 649-657.
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