利用星地双向伪距数据进行钟差预报分析

Clock Bias Forecasting Analysis Using Two-Way Pseudorange Measurement

给出了星地双向上下行伪距观测的数学模型。利用Compass—M1卫星2007-11—25～2007—11-30的实测数据进行了钟差计算，并利用计算结果分别采用3种方案进行了短期、长期钟差预报。总结了钟差预报精度随拟合时间的变化规律，分析了其产生的原因，并给出了有益的结论。

Mathematic models of the up and down link pseudorange in two-way distance measurement are given. First, using the Compass-M1 satellite data from 2007-11-25 to 2007-11-30, the clock bias were calculated. And then, using these solution, the short and long term clock bias forecasting analysis were carried out. Variety characters of clock correction forecasting precision with the time of arc for fitting were analysed, and some useful conclusions were given.