ARAIM Architectures and Availability Prediction Method Based on BDS/GPS

Peng Zhao, Yanbo Zhu, Zhipeng Wang and R. Xue

Abstract:	Autonomous Receiver Integrity Monitor (ARAIM) is updated from RAIM to satisfy LPV-200 requirements in en-route and terminal area. There has been three architectures: Horizontal ARAIM, Offline ARAIM and Online ARAIM. All the architectures use Integrity Support Message (ISM) to ensure their performances. The key parameter among all the ISM parameters is the User Range Accuracy (URA), which represents the ephemeris and clock error of satellite and is the main error source in ARAIM error model. The URA significantly influences the availability of offline architecture and the availability prediction of online architecture. In this paper, we propose a method to promote availability of offline ARAIM through separating the URA into levels. For online architecture, we propose a method to predict the availability through predicting URA according to ground stations geometry. Then a regional architecture based on GPS and BDS is proposed, combining the offline and online architecture together.
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:	658 - 663
Cite this article:	Zhao, Peng, Zhu, Yanbo, Wang, Zhipeng, Xue, R., "ARAIM Architectures and Availability Prediction Method Based on BDS/GPS," Proceedings of the 28th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS+ 2015), Tampa, Florida, September 2015, pp. 658-663.
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