摘要
对现有的恒星日滤波方法进行了修正,提出了利用站点获得的卫星星历分段计算卫星平均轨道周期的方法。实例结果表明,相比修正前的恒星日滤波,修正后的滤波可更有效地提高定位精度,坐标三分量(N、E、U)分别提高了4.5%、5.2%和6.2%,而且在0.001～0.08 Hz频率域上也可获得更好的效果。
The normal sidereal filter is modified,and a way to calculate the mean satellite orbit period by dividing broadcast ephemeris is provided,which is checked through comparison with examples.From the results we can see that,compared to the pre-revision sidereal filter,the modified one can improve the positioning accuracy more efficiently,the accuracy of NEU directions are increased 4.5%,5.2% and 6.2% respectively,and it has better performance between frequencies of 0.001-0.08 Hz.
出处
《武汉大学学报（信息科学版）》
EI
CSCD
北大核心
2011年第5期609-611,616,共4页
Geomatics and Information Science of Wuhan University
基金
地震动力学国家重点实验室开放研究基金资助项目(LED2008B07)
国家973计划资助项目(2008CB25700)
关键词
恒星日滤波
卫星轨道周期
高频GPS
谱分析
sidereal filter
period of satellite orbit
high-rate GPS
spectral analysis
