Potential Performance of Satellite-Based Augmentation System Based on CMONOC in China

To satisfy the requirement of aviation navigation, many countries are committed to the development of Global Navigation Satellite System (GNSS) augmentation systems, especially Satellite-Based Augmentation System (SBAS), to improve the accuracy, integrity, continuity and availability of GNSS. SBAS has been an important solution to improve the comprehensive performance of GNSS for many years. Typically, SBAS in North America and Europe can provide Localizer Performance with Vertical guidance 200 (LPV200) services for their civil aircraft. The services provided by SDCM, MSAS, KASS and GAGAN have been gradually covering the surroundings of China. As both the SF service and the DFMC service provided by BeiDou Satellite-Based Augmentation System (BDSBAS) are being tested, it is urgent to perform the research of SBAS to provide technical support for the construction and subsequent performance improvement of BDSBAS. To improve the processing efficiency of BDSBAS, an architecture of system segment is designed for BDSBAS. Also, considering the problem that it is difficult to guarantee the satellite integrity in the edge area of the monitoring network, a pseudorange residual and satellite-station geometry-based method is proposed to perform satellite integrity monitoring. Results reveal that compared with the direct statistic method, the integrity bounding rate in the pseudorange domain and the availability in the position domain are improved by 45.39% and 2.32% respectively. The designed system can provide Approach Procedure with Vertical Guidance-I (APV-I) services for most parts of China and even LPV200 services for some parts of China.