中文说明：该算法主要实现空间卫星测量数据，由地心惯性坐标系向地心地固坐标转换。主要包括UTC时间转换为儒略日时间，儒略日时间再转换格林尼治时角，再将时角转惯性系等。很好用，请需要的小伙伴试试（注意输入参数）。
English Description：
The algorithm mainly realizes the conversion of space satellite measurement data from geocentric inertial coordinate system to geocentric geofixed coordinate system. It mainly includes the conversion of UTC time to Julian day time, the conversion of Julian day time to Greenwich hour angle, and the conversion of hour angle to inertial system. Very easy to use, please need to try a small partner (note the input parameters).