双向定时近周日误差成分初步分析

Approximate Daily Error Analysis of Two-way Time Determination

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。

The theory of two-way time determination using the geostationary satellite positioning 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＇ twoway 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.