摘要
给出了GPS/GLONASS组合精密单点定位的函数模型及随机模型,对GPS/GLONASS组合精密单点定位的数据融合处理的关键技术进行了研究,实现了基于最小二乘滤波的GPS/GLONASS组合精密单点定位算法和软件,也可以单独使用GPS或GLONASS进行精密单点定位。使用自编软件对实际GPS与GLONASS双星观测数据进行了定位计算,结果表明:①GPS/GLONASS组合较之单一系统精密单点定位提高了收敛速度与收敛后的定位精度;②目前一天24 h的UNB3站数据有21.9%少于5颗GLONASS卫星,不能单独使用GLONASS完成精密单点定位;③GPS与GLONASS的系统时间差波动范围是7.2 ns。
The GPS/GLONASS combined PPP(Precise Point Positioning)'s function and random models are given,and the key techniques for GPS/GLONASS combined PPP are studied.Based on least squares filter,the GPS/GLONASS combined PPP algorithm and software are realized.The actual GPSGLONASS observation datasets are processed using self-developed software,and the results show that: ① Compared to GPS PPP,both the convergence time and the accuracy of GPS/GLONASS combined PPP are improved.② There are less than 5 GLONASS satellites in 21.9% of a whole day's UNB3 data,which can not be used to complete GLONASS PPP.③ The system time difference between GPS and GLONASS is within 7.2 ns.
出处
《武汉大学学报(信息科学版)》
EI
CSCD
北大核心
2010年第12期1409-1413,共5页
Geomatics and Information Science of Wuhan University
基金
济南市科学技术局科技计划专项资助项目(200705014)
武汉市规划国土管理局信息中心资助项目
国家国土资源部"百人计划"资助项目