区域电离层延迟模型研究

Study on Regional Ionospheric Delay Model

电离层延迟是GPS定位中主要误差源之一。本文针对中国区域的电离层延迟问题,首先使用区域电离层延迟模型理论和IGS提供的IONEX数据,分析了中国区域点(120°E,30°N)的不同时间尺度的TEC变化情况,总结出该地区的TEC变化规律。然后采用IGS公布的监测数据对中国区域的电离层延迟进行PPP解算,并利用Matlab对解算结果进行仿真,结果表明:球谐函数模型对于中国区域电离层电子含量解算的特征更具有区域代表性。

Ionospheric delay is one of the main error sources in GPS positioning,especially for single frequency users. In order to solve the ionospheric delay problem in China,firstly,the regional ionospheric delay model theory and IONEX data provided by IGS are used to analyze the change of TEC at different time scales（ 120 ° E,30 ° N） in China and summed up the region＇s TEC changes in the law. And then uses the monitoring data published by IGS to calculate the ionization delay of the ionosphere in China. The simulation results show that the spherical harmonic model has a regional representation for the ionization of the ionosphere in China Sex.