摘要
本文介绍了IGS最新发布的LNAV广播星历的格式,及其计算卫星位置和钟差的方法,采用内维尔算法内插IGS精密星历获取参考值,以均值误差和均方根误差作为精度指标,从不同轨道面选取6颗卫星,按精度分析策略进行计算。结果表明,LNAV广播星历误差在X、Y、Z方向上为1m左右,点位误差优于1.8m,钟差精度在10ns左右,与现有广播星历基本一致。
This paper introduces the format of the latest release of LNAV broadcast ephemeris by IGS,and the calculation method of satellite position and clock errors. The Neville interpolation algorithm for IGS precise ephemeris is used to obtain the reference value by using the mean error and root mean square error as the accuracy index. Six satellites are selected from different orbital planes,and take the accuracy analysis strategy to calculate the satellite position. The results show that LNAV broadcast ephemeris error in X,Y and Z directions is about 1m,point position error is less than 2m and clock bias is about 10 ns.LNAV broadcast ephemeris is basically the same as the existing broadcast ephemeris.
出处
《工程勘察》
2016年第12期65-69,共5页
Geotechnical Investigation & Surveying
关键词
LNAV广播星历
精密星历
点位误差
钟误差
LNAV broadcast ephemeris
precise ephemeris
point position error
clock bias
