1. download the N file at 8:00 on the SHAO site from IGS on February 8, 2017;
2. download the February 8, 2017 SP3 file from IGS;
3. programming read into the SP3 file, N file, according to eleven steps to calculate the February 8, 2017 9:00:00 time of each satellite WGS84 coordinates, and text output;
4. according to the precise ephemeris, the deviation of the satellite coordinates in the three directions of XYZ is calculated.
5., according to the N file read into the specified time, specify the coordinates of the satellite, and display and output.
Platform: Visual C++