The Impact and Mitigation of One Satellite Outage to ARAIM Worldwide Availability

Qian Meng, Jianye Liu, Qinghua Zeng, Shao-jun Feng, Rui Xu

Abstract:	Advanced Receiver Autonomous Integrity Monitoring (ARAIM) is a new technology that will provide worldwide coverage of vertical guidance in aviation navigation. The ARAIM performance and improvement under depleted constellations is a practical problem that needs to be faced and researched further. Firstly, the impacts of one satellite outage on different constellations are analyzed and compared. The conclusion is that GPS is more sensitive and vulnerable to the one satellite outage. Then, a mitigation method based on constellation weighted ARAIM (CW-ARAIM) is proposed. The position solution is replaced by a constellation weighted average solution to eliminate the constellation difference. The new solution will move close to the constellation solutions with respect to the accuracy requirement. The simulation results under baseline GPS and Galileo dual-constellation show that the one GPS satellite outage will knock the availability from 91% to only 50%. The performance remains stable with one Galileo satellite outage. With the assistance of the CW-ARAIM method, the availability can increase from 50% to more than 80% under depleted GPS configurations. The test results under optimistic constellations further verify that a balanced constellation is more important than more satellites on orbit and the superiority of CW-ARAIM method is still effective.
Published in:	Proceedings of the 31st International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS+ 2018) September 24 - 28, 2018 Hyatt Regency Miami Miami, Florida
Pages:	1091 - 1102
Cite this article:	Meng, Qian, Liu, Jianye, Zeng, Qinghua, Feng, Shao-jun, Xu, Rui, "The Impact and Mitigation of One Satellite Outage to ARAIM Worldwide Availability," Proceedings of the 31st International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS+ 2018), Miami, Florida, September 2018, pp. 1091-1102. https://doi.org/10.33012/2018.15935
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