电离层延迟改正模型IRI2001模块，主要用于计算随高度变化的电子密度！,Ionospheric delay correction model IRI2001 modules, the main changes with height used to calculate the electron density!

利用GPS观测文件以及地面站坐标计算电离层中的总电子含量-Files, and ground stations using GPS coordinates calculation observed in the ionosphere total electron content