JPL的stacov文件格式转sinex格式的Fortran源程序-JPLs stacov file format change to sinex format Fortran source code

读取IGS数据中心提供的sinex文件 并恢复法方程-Read sinex file IGS data centers and to restore normal equation

根据sinex文件，程序自动选择给定区域内的IGS站点，并给出URL数据下载链接。(According to the Sinex file, the program automatically selects the IGS site in a given area and gives the URL download link.)