星基增强不同改正策略定位精度分析  

Analysis of positioning accuracy of different correction strategies for satellite based augmentation

作　　者：郭锦萍 白征东[1] 谭宗佩 张强[1] 段博文 GUO Jinping;BAI Zhengdong;TAN Zongpei;ZHANG Qiang;DUAN Bowen(School of Civil Engineering,Tsinghua University,Beijing 100091,China)

机构地区：[1]清华大学土木工程系,北京100091

出　　处：《测绘工程》2023年第5期43-51,共9页Engineering of Surveying and Mapping

摘　　要：基于SBAS星基增强定位原理,分别采用快速校正、长期校正、快速+长期校正3种解算策略对WAAS、EGNOS、MSAS系统覆盖区域内32个IGS站进行星基增强单频静态单点定位,并与标准单点定位的结果进行对比,分析SBAS系统对定位精度的提升效果。结果表明,3种解算策略中,快速+长期校正对定位精度提升效果最好,N,E,U方向分别提升35.93%、26.59%、41.03%;长期校正效果中N,E,U方向分别提升20.80%、11.97%、33.03%;快速校正提升幅度最低,N,E,U方向分别提升8.33%、7.22%、24.32%;三大SBAS系统中,WAAS系统对定位精度的提升效果最优,MSAS系统次之。Based on the principle of SBAS satellite-based augmented positioning,this paper used three solution strategies:fast correction,long-term correction,and fast+long-term correction to perform satellite-based augmentation single-frequency static single-point positioning of 32 IGS stations in the coverage area of WAAS,EGNOS,and MSAS systems.Compared with the results of standard single-point positioning to analyze the positioning performance of the SBAS system,the results show that:among the three calculation strategies,the fast+long-term correction has the best effect on positioning performance improvement,and the accuracies in three directions of N,E,and U are improved by 35.93%,26.59%,and 41.03%.The long-term correction takes second place,and the accuracies in three directions of N,E,and U are improved by 20.80%,11.97%,and 33.03%.The fast correction has the lowest boost,and the accuracies in three directions of N,E,and U are improved by 8.33%,7.22%,and 24.32%.Among the three SBAS systems,the augmentation positioning performance of the WAAS system is the best,the MSAS system takes second place.

关 键 词：星基增强系统 单点定位 定位精度 

分 类 号：P228.4[天文地球—大地测量学与测量工程]