A Comparative Study of Ground Based Augmentation System for Beidou and GPS

Rui Xue and Yanbo Zhu

Abstract:	BeiDou, the China Navigation Satellite System which is designed, developed and operated by China, will provide all-weather and seamless radio navigation service for global civil aviation. There are considerations of providing satellite navigation service for civil aviation inside China using BeiDou as the major constellation and incorporating other constellations been approved by International Civil Aviation Organization (ICAO), like GPS, Galileo and GONASS. However, to satisfy the stringent requirement of civil aviation navigation, augmentation methods are needed to improve the performance of Beidou. The Ground Based Augmentation System (GBAS) defined by ICAO, in which users receive augmentation information from a ground-based transmitter, is the only method could support CAT III precise approach and landing operation using GNSS, and would serve as a major navigation facility for terminal and airport navigation. However, unique characteristics of BeiDou raise incompatibilities to current GBAS technique which is developed based on GPS. In this paper, we first summarize main characteristics of BeiDou constellation based on information been published by administration and researchers of Beidou up to now, including orbit and signal in space. Then the differences between BeiDou and GPS that may have influences to Beidou GBAS are discussed. Thereafter, possible improvements for alternating GPS GBAS techniques to incorporating these differences are proposed. The performance is simulated and compared with GPS GBAS.
Published in:	Proceedings of the 25th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS 2012) September 17 - 21, 2012 Nashville Convention Center, Nashville, Tennessee Nashville, TN
Pages:	317 - 322
Cite this article:	Xue, Rui, Zhu, Yanbo, "A Comparative Study of Ground Based Augmentation System for Beidou and GPS," Proceedings of the 25th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS 2012), Nashville, TN, September 2012, pp. 317-322.
Full Paper:	ION Members/Non-Members: 1 Download Credit Sign In