摘要
2020年年底北斗三号卫星导航系统将全面建设完成,北斗三号沿用了B1I和B3I两个信号,并新增B1C和B2a两个新民用信号。为分析各个信号的观测数据质量,该文选取6个境外iGMAS连续跟踪站15 d的数据对北斗三号的观测数据质量进行分析,从信噪比、伪距多路径、数据完整率、数据饱满度和数据连续性5个方面,综合对比了北斗二号和北斗三号新旧信号的数据质量,并将北斗三号与GPS和Galileo在兼容互操作频点进行对比。结果表明:北斗三号的信噪比优于北斗二号,在兼容互操作频点上也比GPS和Galileo高1~2 dB-Hz;北斗三号B1C的伪距多路径误差比GPS大10 cm左右;北斗三号的数据完整率要比Galileo高,略低于GPS;在数据饱满度和连续性方面,北斗三号优于GPS和Galileo。
BDS-3 satellite navigation system will be fully constructed by the end of 2020.BDS-3 shares B1I and B3 I signals with BDS-2,and adds B 1C and B2a as two new civil signals.To analyze the observation data quality of each signal,in this paper,the quality of BDS-3 observables was analyzed with 15-day data collected at six international GNSS monitoring & assessment system(i GMAS)continuous tracking stations overseas.The data quality of BDS-2 and BDS-3 was compared comprehensively from five aspects,including signal-to-noise ratio(SNR),pseudo-range multipath,data complete rate,data satiation rate and data continuity rate.Comparisons were also performed among BDS-3,GPS and Galileo at the common frequencies for compatibility and interoperability.The results showed that the signal-tonoise ratio of BDS-3 was better than that of BDS-2,and 1〜2 dB-Hz higher than GPS and Galileo at frequencies for compatibility and interoperability.The pseudo-range multipath error of the new B1C signal was about 10 cm larger than that of G P S,while the data complete rate of BDS-3 was higher than that of Galileo and slightly lower than that of GPS.BDS-3 outperformed GPS and Galileo in data satiation rate and continuity rate.
作者
尹志豪
王广兴
胡志刚
薄亚东
YIN Zhihao;WANG Guangxing;HU Zhigang;BO Yadong(School of Geography and Information Engineering.China University of Geosciences,Wuhan 430078,China;GNSS Research Center,Wuhan University,Wuhan 430079,China)
出处
《测绘科学》
CSCD
北大核心
2020年第6期37-45,共9页
Science of Surveying and Mapping
基金
中央高校基本科研业务费专项资金资助项目(CUGL170821)
武汉大学地球空间环境与大地测量教育部重点实验室开放基金资助项目(18-01-06)。
