GPS/GLONASS组合精密单点定位研究  

Study on Precise Point Positioning Based on Combined GPS and GLONASS

作　　者：张小红[1] 郭斐[1] 李星星[1] 林晓静[1] 

机构地区：[1]武汉大学测绘学院,武汉市珞喻路129号430079

出　　处：《武汉大学学报（信息科学版）》2010年第1期9-12,共4页Geomatics and Information Science of Wuhan University

基　　金：国家自然科学基金资助项目(40874017);国家863计划资助项目(2006AA12Z325);国家创新研究群体科学基金资助项目(40721001)

摘　　要：讨论了GPS／GLONAsS组合精密单点定位的数学模型，并以IRKJ跟踪站的观测数据为例，分别利用GPS和GPS／GLONASS组合两种方式进行精密单点定位解算。计算结果表明，当GPS观测卫星数较多（9～10颗）时，组合GPS／GLONASS较单系统GPS的精密单点定位精度及收敛速度有一定改善，但效果不明显。当GPS卫星数较少（4～5颗）时，引入GLONASS卫星进行GPS／GLONASS组合精密单点定位，其定位精度及收敛速度较单系统GPS精密单点均有显著改善。A combined PPP（Precise Point Positioning） mode is implemented using GPS and GLONASS observations. The performance of the combined GPS and GLONASS PPP was assessed using observations from one of the IGS tracking network （IRKJ） and the currently available precise orbit and clock products. The corresponding positioning accuracy and convergence time were compared between GPS-only and GPS/GLONASS combined precise point positioning. The results show that GLONASS has caused a slight impact on positioning accuracy and convergence time in case of more than 8-9 GPS satellites are tracked. However, when the number of available GPS satellites is not enough, especially is less than 4 - 5, adding a couple of GLONASS satellites can improve positioning accuracy and shorten convergence time significantly.

关 键 词：GPS GLONASS 精密单点定位 收敛速度 定位精度 

分 类 号：P228.41[天文地球—大地测量学与测量工程]