GPS精密卫星钟差估计与分析
Realization and Analysis of GPS Precise Clock Products
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摘要: 探讨了GPS精密卫星钟差的估计方法,并分析了伪距与相位观测值对估计精度的影响。基于PAN-DA软件,采用全球均匀分布的40个IGS跟踪站的实测数据,对GPS精密钟差进行估计与分析。试验结果表明,目前采用PANDA软件估计的GPS精密卫星钟差与IGS事后精密卫星钟差比较,互差优于0.2 ns,与国际IGS各分析中心估计的卫星钟差精度相当。Abstract: The method of GPS satellite precise clock estimation is investigated and the contribution of pseudorange and phase measurements in GPS satellite precise clock estimation is analyzed.Based on the PANDA software,about 40 IGS stations are used to estimate the GPS precise clock.The results indicate that the difference of the PANDA clock results from the IGS finial precise clock products is better than 0.2ns,which is the same accuracy level of all IGS analysis centers.
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