基于长基线的BDS精密星历精度对比分析  

Comparative analysis accuracy of BDS precise ephemeris based on long baseline

作　　者：马锐 马亮 师志强 MA Rui;MA Liang;SHI Zhiqiang(Troops 61243,Urumqi 830006,China)

机构地区：[1]61243部队,乌鲁木齐830006

出　　处：《导航定位学报》2024年第3期120-129,共10页Journal of Navigation and Positioning

摘　　要：为对比分析欧洲定轨中心(CODE)、德国地学研究中心(GFZ)与武汉大学(WHU)3种北斗卫星导航系统(BDS)精密星历精度及BDS地球静止轨道(GEO)卫星精度影响,本文选取亚洲和欧洲区域多模全球导航定位系统(GNSS)实验跟踪网(MGEX)测站,从基线结果可靠性、内符合精度、外符合精度3个方面对比分析。结果表明:3种精密星历BDS基线约束固定解NRMS值均小于0.3,说明基线结果精度可靠;BDS基线各分量固定误差均在1 cm以内,比例误差优于9×10^(-9)。亚洲区域,CODE内、外符合精度最高,以GPS基线结果为外部参考,基线平均3D误差为5.13cm;欧洲区域,三种精密星历精度一致,且BDS内符合精度优于GPS,基线平均3D误差为1.90cm左右。亚洲区域禁用BDS GEO卫星后,GFZ与WHU BDS基线水平与垂直分量内符合精度分别平均提高约26.3%、23.9%,外符合精度分别提高约39.1%、51.0%。BDS数据高精度处理时,根据区域选择精密星历并禁用GEO卫星。To compare and analyze the precise ephemeris accuracy of three Beidou satellite navigation systems(BDS)of European Orbit Determination Center(CODE),German Geoscience Research Center(GFZ),Wuhan University(WHU),and the influence of BDS geostationary Earth orbit(GEO)satellites on baseline accuracy,the multi-GNSS experiment(MGEX)network stations in Asia and Europe were selected,a comparative analysis was conducted from 3 aspects:the reliability of baseline results,internal accuracy and external accuracy.The results show that the NRMS values of the fixed solution of BDS baseline constraints for the three types of precise ephemeris were all less than 0.3,indicating that the baseline results were reliable;The fixed error of each component of the BDS baseline was within 1 cm,and the proportional error was better than 9×10^(-9).In Asia,CODE has the highest accuracy,and the average 3D error of the baseline was 5.13 cm with GPS baseline results as external references.In European,the accuracy of the three precise ephemeris was consistent,and the internal accuracy in BDS was better than that of GPS,and the baseline average 3D error was about 1.90cm.In Asia,after disabling BDS GEO satellites,the average internal accuracy improvement in the horizontal and vertical components of GFZ and WHU BDS baselines was about 26.3%and 23.9%,while the external accuracies increased by about 39.1%and 51.0%,respectively.For high-precision BDS data processing,precise ephemeris is selected according to the region and GEO satellites are disabled.

关 键 词：北斗卫星导航系统(BDS) 地球静止轨道卫星 精密星历 内符合精度 外符合精度 

分 类 号：P228[天文地球—大地测量学与测量工程]