利用卫星导航电文，计算某个时刻观察到的卫星的坐标，并与精确卫星坐标对比，可以比较自己的算法。导航电文文件：.06n，精确坐标文件.sp3-The use of satellite navigation data to calculate the satellite observed a moment of the coordinates, and compared with the precision satellite coordinates, you can compare their al