利用SLR和GPS双频相位平滑伪距资料测定导航卫星钟差

Determination of Navigation Satellite Clock Bias Using SLR and GPS Dual Frequency Phase-Smoothed Pseudo-Range Data

采用2002年10月的SLR和伪距实测数据计算GPS 35卫星的钟差,为了验证计算结果的精度,将本文计算的卫星钟差与IGS精密钟差进行了比较。结果表明,采用经过载波相位平滑伪距资料,可以明显提高综合利用SLR和伪距资料直接测定导航卫星的精度;综合利用SLR和GPS双频相位平滑伪距资料测定导航卫星钟差精度优于0.3 ns(1σ),测定的导航卫星钟差与实际钟差不存在系统差。

The bias of GPS35 satellite clock is computed by using the data observed on October 2005. The results compared with the GPS 35 clock bias of IGS. By comparison and analysis,the following facts can be drawn： ① It improves the precision of pseudo range using phase smoothing pseudo-range, and improves the precision of satellite clock bias when the clock bias is calculated by using SLR and smoothed pseudo-ranges data. ② The precision of navigation satellite clock bias is better than 0.3 nanosecond（1σ） ,when the bias is calculated by using SLR data and smoothed pseudo-ranges data. There is no systematic error between our results and IGS＇s clock bias.