摘要
针对全球卫星导航系统(GNSS)卫星端相位小数周偏差(FCB)难以有效分离而导致模糊度固定较为困难的问题,该文通过构建基于原始频率观测值上的双频非组合FCB估计模型,实现了全球定位系统(GPS)、北斗二号(Beidou-2,BDS-2)和北斗三号(Beidou-3,BDS-3)卫星端FCB精确估计,并在此基础上实现了GPS、GPS/BDS-2和GPS/BDS-2/BDS-3不同系统融合的静态和动态非组合精密单点定位(PPP)模糊度固定解。结果表明,GPS FCB稳定性最优,BDS-3FCB稳定性略差于BDS-2;相对于单GPS和GPS/BDS-2系统,GPS/BDS-2/BDS-3融合的PPP固定解在定位精度、收敛时间和模糊度固定率等方面得到显著改善。
Aiming at the problem that it is difficult to effectively separate phase fraction cycle bias(FCB)of global navigation satellite system(GNSS)satellite,which results in the difficulty in fixing the ambiguity,the accurate FCB of the GPS,BDS-2and BDS-3 was realized by constructing a dual-frequency uncombined FCB estimation model based on the original frequency observations.On the basis,the static and dynamic un-combined precise point positioning(PPP)ambiguity fixed solutions for different systems fusion of GPS,GPS/BDS-2and GPS/BDS-2/BDS-3were realized.The results showed that the stability of GPS was best,and BDS-3slightly less than BDS-2.Compared to the single GPS and GPS/BDS-2systems,the PPPfixed solution of GPS/BDS-2/BDS-3 was significantly improved in terms of positioning accuracy,convergence time and fixed rate.
作者
孙孝波
顾天琪
谷守周
林爽
贾强
SUN Xiaobo;GU Tianqi;GU Shouzhou;LIN Shuang;JIA Qiang(State Grid Information&Telecommunication Group CO.,LTD.,Beijing 102211,China;Beijing Smratchip Micelectronics Technology Company Limited,Beijing 102200,China;Chinese Academy of Surveying and Mapping,Beijing 100036,China;Fujian Power Co.,Ltd.,Electric Power Research Institute,Fuzhou 350007,China)
出处
《测绘科学》
CSCD
北大核心
2022年第4期26-33,共8页
Science of Surveying and Mapping
基金
国网信息通信产业集团两级协同研发项目(52680020002V00K0)。
