精密进近阶段的多系统GNSS组合RAIM可用性算法及分析  

Multi-GNSS RAIM availability algorithms and analysis for precise approach

作　　者：蒋虎[1,2] 袁运斌[1] 王海涛[1] 欧吉坤[1] 蒋振伟 

机构地区：[1]中国科学院测量与地球物理研究所大地测量与地球动力学国家重点实验室,武汉430077 [2]中国科学院大学,北京100049 [3]北京空间信息中继传输技术研究中心,北京100094

出　　处：《中国空间科学技术》2016年第3期32-40,共9页Chinese Space Science and Technology

基　　金：973基金(2012CB825604);国家自然科学基金(41231064;41474029;41174015)

摘　　要：给出了多系统全球卫星导航系统(GNSS)组合接收机自主完好性监测(Receiver Autonomous Integrity Monitoring,RAIM)可用性计算方法,在此基础上利用GPS、GLONASS实测数据与BDS、Galileo全星座仿真数据,分析了BDS、GPS、GLONASS和Galileo不同组合在精密进近阶段的RAIM可用性。通过试验分析发现,BDS的5颗地球同步轨道卫星和3颗倾斜地球同步轨道卫星对亚洲、非洲和欧洲大部分地区的RAIM可用性有很大的贡献。这些地区站星间几何观测结构得到改善,使得RAIM可用性相对于其他地区有很大幅度的提升。在亚太地区APV-I阶段单系统导航情况下,北斗导航系统RAIM可用性达到99.5%,高于其他三个导航系统。在精密进近阶段(APV-I、APV-II和CAT-I),BDS与其他导航系统(GPS、GLONASS和Galileo)的组合导航可以满足全球大部分区域的RAIM可用性需求,大多可达到100%。With the continuous development of global navigation satellite system（GNSS）,the combined multi-system receiver autonomous integrity monitoring（RAIM） has been animportant topic based on BDS/GPS/GLONASS/Galileo.The algorithm of Multi-GNSS RAIM availability was proposed,and the availability of a combined multi-system RAIM based on simulated navigation ephemeris of BDS/Galileo and actual navigation ephemeris of GPS/GLONASS was analyzed in precise approach procedures. Results show that five geosynchronous orbit（GEO）satellites and three inclined geosynchronous orbits（IGSO）satellites from BDS make a great contribution to RAIM availability. The eight satellites improve the geometry structure of the constellation in the most parts of Asia,Africa and Europe,and promote RAIM availability greatly. In the Asia-Pacific region, the RAIM availability of BDS reaches 99.5%,higher than that of the other three navigation system at APV-I phase.In precise approach phases（APV-I,APV-II and CAT-I）,the integrated BDS/GPS/ Galileo/GLONASS can meet the requirements of RAIM availability in a global scale.

关 键 词：全球卫星导航系统 接收机自主完好性监测 精密进近 地球同步轨道 倾斜地球同步轨道 可用性 

分 类 号：P228.1[天文地球—大地测量学与测量工程]