基于GNSS网络的卫星精密钟差估计及结果分析

Precise Clock Error Estimation of GPS Satellite and Analysis Based on GNSS Network

摘要: 采用历元间、星间差分技术,估计了基于参考历元的相对钟差。以不同局域GNSS网络、不同观测间隔连续三天的观测数据进行了参数估计,研究了不同区域、采样间隔对估计结果精度的影响。与IGS最终精密钟差相比,估计得到的相对钟差的历元间差优于0.2 ns,基于参考历元的相对钟差的精度优于0.9 ns。不同区域的估计结果精度大致相当;采样间隔对估计结果的影响很小。

Abstract: The reference epoch based relative clock was estimated using the method of epoch-difference and satellite-difference.An experiment is carried out using the data of different sampling rates collected from Hong Kong and Shanghai GNSS reference networks,in order to study the influences of region and sampling rates to the accuracy.The results show that the difference between our results and IGS final precise clock error products is less than 0.2 ns,and the accuracy of the reference epoch based relative clock is less than 0.9 ns.The accuracy is at the same level in different regions,and the influence of sampling rate is very small.