双向定时近周日误差成分初步分析

该文介绍了利用地球同步卫星定位系统进行双向定时的基本原理,采用北京和乌鲁木齐两站的试验数据进行了计算分析,发现双向定时结果明显存在周期性变化,并且两地结果随地方时的变化趋势基本一致。谱分析表明:两站的主要周期谱基本一致,都比较明显地存在近周日和近半日变化。这种周期性变化可能主要由电离层延迟随地方时的变化引起。

Approximate Daily Error Analysis of Two-way Time Determination

The theory of two-way time determination using the geostationary satellite posi- tioning system is introduced.Calculation and analysis are done using test data on Beijing and Urumchi stations.The results show that obvious periodical variations exist in two stations'two- way time determination,and the varying trend of these variations with local time is consistent with each other.Spectrum analysis indicates that these variations have one-day and half-day major periodic spectrums,and which are approximate equal on two stations.It is analyzed that these periodical variations are possible due to ionospheric delay varying with the local time.