不同方法的BDS-3多频单点测速对比分析  

Comparative analysis of BDS-3 single point velocity estimation for different frequencies with different methods

作　　者：耿涛[1] 杨佳彬 谢新 GENG Tao;YANG Jiabin;XIE Xin(GNSS Research Center,Wuhan University,Wuhan 430079,China)

机构地区：[1]武汉大学卫星导航定位技术研究中心,武汉430079

出　　处：《导航定位学报》2023年第4期56-62,共7页Journal of Navigation and Positioning

摘　　要：针对北斗三号卫星导航系统(BDS-3)不同测速方法在不同环境下的测速性能缺乏全面评估的问题,提出一种BDS-3多频单点测速对比分析方法:利用BDS-3静态和动态数据,对比分析基于载波相位差分、多普勒、伪距差分方法的BDS-3不同频点静态和动态测速性能。实验结果表明:静态环境下,载波相位差分测速精度最好,可达到mm/s量级,伪距差分测速精度最差,为cm/s至dm/s量级;动态环境下,多普勒和载波相位差分测速的精度较好,水平方向可达到cm/s量级,高程方向约为1 dm/s,伪距差分测速误差较大;对不同频点的测速结果分析表明,BDS-3系统B1I、B1C、B2a、B2b、B3I等5个频点的测速精度基本在同一个量级。Aiming at the problem that there is a lack of comprehensive performance evaluation of BeiDou-3 navigation satellite system(BDS-3)velocity estimation with different methods in different environments,the paper proposed a comparative analysis method of BDS-3 single point velocity estimation for different frequencies:with static and dynamic observation data,the BDS-3 static and dynamic velocity estimation performance at different frequencies based on the time differenced carrier phase,Doppler and pseudorange differenced methods were compared and analyzed.Experimental result showed that in static conditions,the accuracy of time differenced carrier phase velocity estimation would be the best,reaching the order of mm/s,meanwhile,the accuracy of time differenced pseudo-range velocity estimation would be the worst,ranging the order from cm/s to dm/s;in dynamic condition,both Doppler and time differenced carrier phase velocity estimation would have good accuracy,reaching the order of cm/s in horizontal direction and about 1 dm/s in vertical direction,respectively,while the error of time differenced pseudo-range velocity estimation would be large;moreover,the analysis of velocity estimation with different frequencies indicated that velocity estimation accuracy of BDS-3 five frequencies(B1I,B1C,B2a,B2b and B3I)would be basically in the same magnitude.

关 键 词：北斗三号卫星导航系统(BDS-3) 测速 多频 多普勒测速 载波相位差分 

分 类 号：P228[天文地球—大地测量学与测量工程]