摘要
针对目前有关北斗三号系统伪距单点定位研究较少,未对三号系统多个频点的定位性能进行对比分析的现状,本文利用实测数据对三号系统多个频点的定位性能进行了研究,并联合BDS-2、Galileo进行了同频伪距单点定位试验,统计分析了组合定位多个频点的同频定位结果。试验结果表明:目前三号系统单独定位能力有限,不适合单独定位;BDS-3/Galileo同频组合定位可以弥补BDS-3新频点单频定位时卫星个数不足、数据不完整导致的定位精度过差的情况,同时能够提高Galileo的定位精度;BDS-2/3的B3I频点与BDS/Galileo组合的B2b频点的定位精度均与GPS的L1频点的定位精度相当。
Currently,the study on BDS-3 pseudo-range single point positioning(SPP)is insufficiency and there are no comparative analyses about the results of multi-frequency SPP in BDS-3.In this paper,the performance of multi-frequency SPP in BDS-3 are analyzed by using the measured data.In addition,the same frequency SPP experiment of the combination with BDS-2,Galileo are carried out in this paper to analyze the results of the same frequency combination of multi-frequency SPP.The experimental results show that the BDS-3 is unsuitable to positioning independently due to its limited positioning ability at present.The same frequency SPP of the combination BDS-3/Galileo can compensate the poor positioning accuracy caused by the inadequate number of satellites(NSAT)and incomplete data in BDS-3 new frequency SPP,and improve the SPP accuracy of Galileo.The positioning accuracy of the frequency B3 I in BDS-2/3 and the frequency B2 b in BDS/Galileo are similar to that of the frequency L1 in GPS.
作者
张乾坤
刘小生
何琦敏
ZHANG Qiankun;LIU Xiaosheng;HE Qimin(School of Architectural and Surveying Engineering,Jiangxi University of Science and Technology,Ganzhou 341000,China;School of Environmental Science and Spatial Informatics,CUMT,Xuzhou 221116,China)
出处
《测绘通报》
CSCD
北大核心
2020年第1期71-75,共5页
Bulletin of Surveying and Mapping
关键词
北斗三号系统
单点定位
同频组合
可见卫星数
精度衰减因子
BDS-3 system
single point positioning
same frequency combination
the number of visible satellite
dilution of precision
