SSR改正的GLONASS/GPS实时PPP性能分析  

Performance Analysis of SSR-Corrected GLONASS/GPS Real-Time PPP

作　　者：徐泽远 李淑慧[1] 谢名强 付建强 张靖雷 武博文 XU Zeyuan;LI Shuhui;XIE Mingqiang;FU Jianqiang;ZHANG Jinglei;WU Bowen(China University of Geosciences,Beijing 100083,China)

机构地区：[1]中国地质大学(北京),北京100083

出　　处：《测绘科学技术学报》2020年第3期246-251,共6页Journal of Geomatics Science and Technology

基　　金：国家自然科学基金项目(41574011)。

摘　　要：收敛时间和定位精度是实时精密单点定位关注的重点。在评估SSR中GLONASS和GPS的可用率、轨道和钟差改正精度的基础上,对多个IGS测站一周的观测数据进行精密单点定位,与CODE MGEX最终产品的定位结果进行对比。结果表明,CLK93数据流中GPS、GLONASS数据完整率可达89.07%、92.04%。实时GPS定位三维收敛到10 cm的时间比最终产品多16.0%,定位精度相差不到1%。加入实时GLONASS数据后收敛时间缩短16.9%,定位精度提升了4.4%。实时GPS/GLONASS组合的收敛时间比最终产品多30.3%,定位精度差10.7%。Convergence time and positioning accuracy are the focuses of real-time precise point positioning.Based on the evaluation of the availability,orbit and clock error correction accuracy of GLONASS and GPS in SSR,precise point positioning is performed on the observation data of multiple IGS stations for one week,whose result is compared with the positioning results of the CODE MGEX final product.The results show that the data integrity rate of GPS and GLONASS in CLK93 data stream can reach 89.07%and 92.04%.The convergence time of real-time GPS positioning to 10 cm in three dimensions is 16.0%longer than that of the final product,and the positioning accuracy is less than 1%lower than that of the final product.After adding real-time GLONASS data,the convergence time is shortened by 16.9%,and the positioning accuracy is improved by 4.4%.The convergence time of real-time GPS/GLONASS combination is 30.3%longer than that of the final product,and the positioning accuracy is 10.7%worse.

关 键 词：SSR信息 GPS/GLONASS组合 精密单点定位 收敛时间 定位精度 

分 类 号：P228[天文地球—大地测量学与测量工程]