说明：  用Mathlab从.txt文件中读取数据 txt文件是从AGI网站下载的卫星两行根数文件，利用mathlab从中读取数据，并统计卫星的轨道参数。
(By using Mathlab. TXT file to read data TXT file download from AGI sites with satellite, root number of files, using mathlab to read data from them and statistics of the satellite orbit parameters. )