中文说明:
本程序包主要有5个函数,分别实现了大地坐标与WGS84坐标的转换,卫星位置计算,电离层延迟模型,对流层延迟模型
English Description:
This package is mainly has five functions, respectively the geodetic coordinate and WGS84 coordinate transformation, the satellite position calculation, ionospheric delay model, the model of the tropospheric delay