摘要
为探讨不同区域不同系统伪距单点定位的精度,本文建立了四种单系统伪距单点定位模型,对各单系统的定位结果进行对比分析.选取MGEX提供的全球卫星导航系统(GNSS)数据作为算例分析.结果表明:不同的区域,各单系统体现出不同的定位效果;在N、E和U方向上,GPS的定位残差多数在-5~5m之间变化;GLONASS的定位残差均在-15~15m之间变化;北斗卫星导航系统(BDS)在亚洲区域的定位结果远优于其他区域,残差变化较平缓.Galileo受时段长度的限制,对于较长的有效时段,Galileo在三个方向上的定位结果稳定,定位精度也可达到5m.
In order to explore the accuracy of pseudo-point single-point positioning in different systems in different regions,four single-system pseudo-range single-point positioning models are established in this paper,and the positioning results of each single system are compared and analyzed.The GNSS data provided by MGEX is selected as a case study.The results show that each single system reflects different positioning effects in different regions.In the three directions of N,E and U,the positioning residuals of GPS mostly change between-5 and 5 m;the positioning residuals of GLONASS vary from-15 to 15 m.The positioning results of BDS in the Asian region are far superior to other regions,and the residual changes are more gradual.GALILEO is limited by the length of the period.For longer effective periods,the positioning results and GALILEO in three directions are stable,and the positioning accuracy can reach 5 m.
作者
徐宁辉
陆杰
梁月吉
XU Ninghui;LU Jie;LIANG Yueji(Nanning Surveying and Mapping Geographic Information Institute,Nanning 530001,China;College of Geomatics and Geoinformation,Guilin University of Technology,Guilin 541004,China)
出处
《全球定位系统》
CSCD
2019年第5期77-84,共8页
Gnss World of China
基金
广西空间信息与测绘重点实验室项目(16-380-25-22)
关键词
单系统
伪距单点定位
不同地区
精度分析
single system
the pseudo-range single point positioning
different regions
precision analysis
