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Application of GPS Dual Frequencies Phase-Smoothed Pseudo-Range Data in Accuracy Evaluation of Satellite Clock Error of Broadcast Ephemeris
Author(s): 
Pages: 209-213
Year: Issue:  2
Journal: JOURNAL OF EARCH SCIENCES AND ENVIRONMENT

Keyword:  Hatch滤波相位平滑伪距消电离层组合广播星历卫星钟差精度评定;
Abstract: 利用Hatch滤波对双频消电离层组合伪距观测值进行相位平滑讨论,对原Hatch滤波公式中的定权方法进行了改进.在此基础上,利用伪距与星地距比对法对广播星历中卫星预报钟差精度评定进行了研究.计算结果表明:载波相位平滑能有效地提高伪距观测量的精度,从而提高伪距与星地距比对法评估卫星预报钟差的可行性.利用双频消电离层相位平滑伪距计算的卫星钟差精度优于1 ns(1σ),测定的卫星钟差与实际卫星钟差不存在系统差.
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