Present and Future of China Satellite-Based Augmentation System China Satellite Navigation Office February 2014
Contents o Present of China Satellite-Based Augmentation System o Future of China Satellite-Based Augmentation System
Present of China Satellite-Based Augmentation System Bei. Dou Satellite Navigation System is designed integrating of the basic navigation system and the Satellite-Based Augmentation System, and it can provide basic navigation service as well as differential augmentation service. The service has been on line since Dec. 27 th, 2012. At the same time, experiments on the Satellite-Based Augmentation technology that provides service to GPS L 1 C/A based on Bei. Dou GEO satellites have been implemented, and the results have demonstrated its feasibility.
Present of China Satellite-Based Augmentation System o System composition n 3 GEO Satellites（80°E, 110°E, 140°E） n 29 monitor stations n 1 master control station
Present of China Satellite-Based Augmentation System o B 1 I of Signal in Space, Main content is as follows, detail is on ICD Parameters Update rate Remarks Augmentation health information Sat. H 2 3 s Satellite health flag for integrity and differential correction information Satellite augmentation information △t 18 s Equivalent clock correction UDREI 3 s User differential range error index RURA 18 s Regional user range accuracy index △τ 6 min Vertical ionospheric delay at grid point GIVEI 6 min Grid ionospheric vertical delay error index Grid ionospheric augmentation information o System accuracy: 3 -5 m; Other performance are beening tested
Contents o Present of China Satellite-Based Augmentation System o Future of China Satellite-Based Augmentation System
Future of China Satellite-Based Augmentation System o Aims n Service area : China and surrounding areas n Support single frequency and multi-frequency users n Multi-system augmentation ability n Consider the possible of being compatible and interoperable with EGNOS and WAAS n Provide CAT-I service
Future of China Satellite-Based Augmentation System o Technology roadmap n Launch 3 GEO satellites： 80°E, 110°E, 140°E n Increase ground monitor stations: About 40 stations(China and surrounding areas) n Upgrade the algorithm of master control station : Provide dual frequency, multi-system service n Increase B 1 C(L 1), B 2 a(L 5) signal, being compatible and interoperable with SBAS n Broadcast augmentation information：Broadcast ephemeris/clock corrections, grid ionospheric correction and its corresponding integrity parameters. The format meets international standards.
Future of China Satellite-Based Augmentation System o Development plan China Satellite-Based Augmentation System( B 1 I) IOC China Satellite-Based Augmentation System modernization (B 1 C, B 2 a) 2012 2014 2016 2018 2020 2022 2024 2026 2028 2030
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