GNSS广播星历精度评定与对比
首发时间:2017-08-25
摘要:为了评定GNSS导航定位系统用于矿山开采沉陷、岩体移动以及进行控制时的精度,本文以gbm精密星历和钟差作为参考真值,对GPS、BDS、GALIEO以及GLONASS系统四大系统2017年2月1日到2017年2月28天的广播星历、钟差以及卫星空间测距误差(SISRE)进行对比分析。实验结果表明,GPS轨道颈向、切向、法向的精度为1m,0.4m,0.8m左右,钟差为2ns,卫星信号测距误差(SISRE)为0.4m;BDS不同类型卫星表现出很大差异,GEO颈向、切向、法向的精度分别2m,1.3m,0.2m左右,钟差为14ns,SISRE为4.4m,IGSO颈向、切向、法向的精度为0.8m,1.1m,0.4m,钟差为3ns,SISRE为3.0m,MEO颈向、切向、法向的精度为1.2m,0.6m,0.3m,钟差为3ns,SISRE为1.2m;GALIEO卫星的颈向、切向、法向的精度为0.3m,0.3m,0.2m,钟差为2.5ns左右,SISRE为0.8m;GLONASS卫星的颈向、切向、法向的精度为0.4m,1.0m,0.4m,钟差为2.5ns左右,SISRE为2.5m。
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Accuracy evaluation and comparison of GNSS broadcast ephemeris
Abstract:In order to evaluate the accuracy of GNSS navigation positioning system for mining subsidence, rock mass displacements and deformations and control survey. The gbm precise ephemeris and clock bias is a true reference value to contrast and analyze the orbit and clock error to count spatial signal ranging error (SISRE) of GPS, BDS, GALIEO and GLONASS navigation files from February 1 to February 28 of 2017. The experimental results show that the accuracy of GPS orbit to the neck, tangential, normal, clock difference of 2ns, SISRE is 1m, 0.4m, 0.8m, 2ns, 0.4m respectively; and the BDS GEO is 2m,1.3m,0.2m,14ns and 4.4m,and the BDS IGSO is 0.8m,1.1m,0.4m, 3ns and 3.0m,and the BDS MEO is 1.2m,0.6m,0.3m,3ns and 1.2m with the different type of BDS orbit shows great difference; the GALIEO is 0.3m,0.3m,0.2m, 1.5ns and 0.8m; the GLONASS is 0.4m,1.0m,0.4m, 2.5ns and 2.5m.
Keywords: precise ephemeris broadcast ephemeris orbit accuracy clock difference SISRE
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No.4740565116213215****
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