北斗三号B1I/B2a相对定位精度分析  

Analysis of Relative Positioning Accuracy of BDS-3 B1I/B2a

作　　者：王立诗云 WANG Lishiyun(Nanning Survey and Design Institute Co.,Ltd.,China Railway Siyuan Group,Naning 430007,China)

机构地区：[1]中铁四院集团南宁勘察设计院有限公司,广西南宁430007

出　　处：《昆明冶金高等专科学校学报》2024年第2期26-32,共7页Journal of Kunming Metallurgy College

基　　金：国家自然科学基金“区域安全公正空间识别、社会生态机制与调控:基于生态系统服务供需关系视角”(42271106)。

摘　　要：为了研究北斗三号导航卫星系统(BDS-3)B1I/B2a相对定位精度,通过GAMIT10.71软件处理澳大利亚地区10个MGEX跟踪站数据。实验结果表明:格洛纳斯(GLONASS)G1/G2的N、E、L基线向量标准差最大分别达到8.00 mm,12.10 mm和10.60 mm;北斗二号导航卫星系统(BDS-2)B1I/B2I的U基线向量标准差最大达到28.70 mm。基线长度与基线长度标准差(STD)呈正相关。BDS-3 B1I/B2a、伽利略导航卫星系统(Galileo)E1/E5a和全球定位系统(GPS)L1/L2的点位中误差和加权均方根(WRMS)整体较小,精度较高;BDS-2 B1I/B2I和GLONASS G1/G2则整体较大,精度较低。实验结果进一步表明:BDS-3 B1I/B2a相比较于BDS-2 B1I/B2I的定位精度有大幅度提升。This article is to study the relative positioning accuracy of B1I/B2a of BeiDou-3 Navigation Satellite System(BDS-3).The data of 10 Multi-GNSS Experience(MGEX)tracking stations in Australia were processed by GAMIT software.The experimental results showed that the maximum standard deviation(STD)of Global Navigation Satellite System(GLONASS)G1/G2 north(N),east(E),length(L)baseline vectors reached 8.00 mm,12.10 mm and 10.60 mm,respectively;the maximum standard deviation of up(U)baseline vector of BeiDou-2 Navigation Satellite System(BDS-2)B1I/B2I is 28.70 mm.The baseline length was positively correlated with the standard deviation(STD)of baseline length.The mean square error and weighted root mean square(WRMS)of BDS-3 B1I/B2a,Galileo satellite navigation system(Galileo)E1/E5a and Global Positioning System(GPS)L1/L2 are generally small,with high accuracy;BDS-2 B1I/B2I and GLONASS G1/G2 are relatively large and low in accuracy.The experimental results further show that the positioning precision of BDS-3 B1I/B2a has been greatly improved compared with that of BDS-2 B1I/B2I.

关 键 词：北斗三号导航卫星系统 基线向量标准差 基线长度标准差 点位中误差 加权均方根 

分 类 号：P228[天文地球—大地测量学与测量工程]