摘要
本文系统地分析了多种精密卫星钟差加密方法,以IGS提供的GPSweek 1421周第2天的2号、11号、21号和28号卫星的30s间隔的精密卫星钟差为基准,然后以从中提取的15min和5min间隔的钟差为例,将其用内插或拟合等不同方法分别加密到30s,将加密结果与30s间隔的精密卫星钟差基准进行比较分析,得出样条函数内插法精度较高、较可靠,拟合法精度较差,在个别历元处,内插或拟合卫星钟差的误差仍然很大。
Several densification methods of precise satellite clock bias are introduced.Using IGS 15min-interval and 5min-inter- val satellite clock bias of PRN02,PRN11,PRN21 and PRN28,which are got from 30-second-interval precise satellite clock bias on the second day GPSweek 1421,the IGS clock bias are densified at 30-second-interval by different densification methods introduced. Then the satellite clock bias gained by different densification methods have been compared to values determined by IGS.The results show th...
出处
《测绘科学》
CSCD
北大核心
2008年第S1期36-38,17,共4页
Science of Surveying and Mapping
关键词
精密单点定位
卫星钟差
钟差估计
插值法
拟合
precise point positioning
satellite clock bias
clock bias estimation
interpolation
fitting
