摘要
目前,北斗三号卫星导航系统(BDS-3)新增了互操作信号B1C和B2a,为保障BDS-3的定位精度,有必要对新信号的观测数据进行全面分析。文章选取2020年4月1日至10日共10 d 19个iGMAS跟踪站的观测数据,从数据完整率、信噪比、多路径效应、电离层延迟变化率等4个方面进行评价,并与GPS L1/L5和Galileo E1/E5a对比,对9颗BDS-3中圆地球轨道(Medium Earth Orbit,MEO)卫星的观测数据进行评估。结果表明:B2a在数据完整率、信噪比、多路径效应方面略优于B1C,但差距不大,B1C在抑制电离层延迟变化率方面优于B2a;BDS-3的B1C/B2a与GPS、Galileo的兼容频率基本处于同一水平,在信噪比、电离层延迟变化率等方面甚至优于L1/L5、E1/E5a。
The BDS global navigation satellite system(BDS-3)has newly added interoperable signals B1C and B2a.In order to ensure the positioning accuracy of the BDS-3 system,it is necessary to conduct a comprehensive analysis of the observation data of the new signal.This paper selected the observations of 19 iGMAS tracking stations for 10 d from April 1 to April 10,2020,and evaluated it from four aspects:data integrity rate,signal-to-noise ratio(SNR),multipath effect and ionospheric delay rate(IOD),compared the results with those of GPS L1/L5 and Galileo E1/E5a,and assessed the observation data of 9 BDS-3 Medium Earth Orbit(MEO)satellites.The results showed that B2a was slightly better than B1C in data integrity rate,SNR and multipath effect,but there was not much difference.B1C was better than B2a in inhibiting IOD.The compatibility frequency of B1C/B2a of BDS-3 is basically the same as that of GPS and Galileo,and it is even better than L1/L5 and E1/E5a in some aspects,such as SNR and IOD.
作者
李树文
王潜心
龚佑兴
LI Shuwen;WANG Qianxin;GONG Youxing(School of Environment and Spatial Informatics, China University of Mining and Technology, Xuzhou 221116, China;Key Laboratory of Land Environment and Disaster Monitoring of Ministry of Natural Resources, China University of Mining and Technology, Xuzhou 221116, China;School of Military Basic Education, National University of Defense Technology, Changsha 410073, China)
出处
《合肥工业大学学报（自然科学版）》
CAS
北大核心
2021年第8期1111-1117,共7页
Journal of Hefei University of Technology：Natural Science
基金
国家自然科学基金资助项目(41874039)
江苏省自然科学基金资助项目(BK20191342)。
