坐标转换，包括大地坐标，空间直角坐标、等-Coordinate transformation, including geodetic coordinates, rectangular space coordinate

详细介绍了轨道方程，轨道六要素，以及坐标计算方法，包括椭圆轨道面坐标、大地空间直角坐标以及经纬度坐标的计算方法(The orbit equation, the six elements of orbit and the coordinate calculation method are introduced in detail, including the calculation method of elliptical orbit, plane coordinates, geodetic sp

用C语言实现空间大地直角坐标和大地坐标之间的相互转换(C language is used to realize the transformation between rectangular coordinates and geodetic coordinates.)