大地测量与地球动力学2017，Vol.37Issue(10)：1065-1069,5.DOI:10.14075/j.jgg.2017.10.016
多系统融合精密单点定位性能分析
Performance Analysis on Multi-GNSS Precise Point Positioning
摘要
Abstract
The theory and algorithms of multi-GNSS precise point positioning(PPP) are studied and the convergence time and positioning precision are also analyzed in this article.We use observations from GPS,GLONASS,Beidou and Galileo and the MGEX precise ephemeris and clock from GFZ.The results show that,in static PPP,the convergence speed of Beidou is slow and the positioning accuracy of Beidou is about 5 cm in horizontal,8 cm in vertical.The convergence speed of G/R/C/E combined PPP is faster than any single system and the positioning accuracy is close to GPS.In kinematic PPP,the average convergence time of Beidou is 110 min or more and the positioning accuracy of Beidou is about 8 cm in horizontal,16 cm in vertical.The convergence speed of G/R/C/E combined PPP is also the fastest,whereas the positioning accuracy is not significantly improved compared to GPS.Under the circumstances of higher cut-off elevation,the positioning errors of GPS are larger than multi-GNSS,since multi-GNSS can observe more satellites than GPS.关键词
多系统融合/精密单点定位/收敛速度/定位精度Key words
multi-GNSS/precise point positioning/convergence speed/positioning accuracy分类
天文与地球科学引用本文复制引用
张守建,王伟..多系统融合精密单点定位性能分析[J].大地测量与地球动力学,2017,37(10):1065-1069,5.基金项目
National Key Basic Research Program of China,No.2013CB73301 （）
National Natural Science Foundation of China,No.41674031.国家973计划(2013CB73301) （2013CB73301）
国家自然科学基金(41674031). （41674031）
