主要包含经纬高信息、北天东坐标系、地心坐标系之间的坐标转换，用labview实现的。(It mainly includes the coordinate transformation between the latitude and longitude information, the North East coordinate system and the geocentric coordinate system. It is realized by LabVIEW)

将直角坐标系数据转换成极坐标数据，以便绘制主轴轴心轨迹(Converting Cartesian coordinates into polar coordinates to plot axis center trajectory)