GPS/Galileo/BDS-3广播星历精度分析  

Accuracy analysis of GPS/Galileo/BDS-3 broadcast ephemeris

作　　者：彭华东 乔书波[1] 杨显赐 PENG Hua-dong;QIAO Shu-bo;YANG Xian-ci(Information Engineering University,Zhengzhou 450001,China)

机构地区：[1]信息工程大学,郑州450001

出　　处：《时间频率学报》2024年第1期62-71,共10页Journal of Time and Frequency

基　　金：国家自然科学基金(47074010)。

摘　　要：为了分析当前GPS(Global Positioning System)、Galileo(Galileo Navigation Satellite System)和BDS-3(Beidou Navigation Satellite System with Global Coverage)广播星历的精度,详细分析研究了各种偏差改正及消除方法,并尽可能地消除了系统误差和粗差对评估结果的影响。选取2021-11-01/12-31共61天MGEX(multi-GNSS experiment)发布的多系统混合广播星历与武汉大学分析中心发布的事后精密星历数据进行实验,对GPS、Galileo和BDS-3近期广播星历精度进行对比分析,实验结果表明:3个系统广播星历整体精度由高到低依次是Galileo、BDS-3和GPS,其空间信号测距误差的RMS(root mean square)分别优于0.17、0.25和0.37 m,整体轨道精度的RMS分别优于0.17、0.12和0.25 m,BDS-3广播星历的轨道精度最高,钟差误差的RMS分别优于0.15、0.23和0.27 m,Galileo广播星历的钟差精度最高。对于GPS卫星的广播星历,blockⅢA卫星钟差和轨道精度均优于其他GPS类型卫星。To analyze the accuracy of current Global Positioning System(GPS),Galileo Navigation Satellite System(Galileo)and Beidou Navigation Satellite System with Global Coverage(BDS-3)broadcast ephemeris,various error correction and elimination methods are analyzed in detail,and the influences of systematic errors and gross errors on evaluation results are eliminated as much as possible.The multi-system hybrid broadcast ephemeris released by multi-GNSS experiment(MGEX)from 2021-11-01 to 2021-12-31 and the precision ephemeris released by the Analysis Center of Wuhan University were used for the experiment.The precision of the recent broadcast ephemeris of GPS,Galileo and BDS-3 was compared and analyzed.The experimental results show that the Galileo ephemeris exhibits the highest accuracy,while those from BDS-3 and GPS provide the second and the third best results.The root mean square(RMS)of space signal ranging error is better than 0.17,0.25 and 0.37 m for Galileo,BDS-3 and GPS,respectively.Their RMS of 3D orbit accuracy is better than 0.17,0.12 and 0.25 m,respectively,with the BDS-3 performing the best.The RMS of clock errors is better than 0.15,0.23 and 0.27 m,respectively,with the best coming from Galileo.For the broadcast ephemeris of GPS satellites,the clock and orbit accuracy of blockⅢA satellite is better than those of other GPS blocks.

关 键 词：全球定位系统 伽利略卫星导航系统 北斗三号卫星导航系统 广播星历 轨道精度 钟差精度 

分 类 号：P228.4[天文地球—大地测量学与测量工程]