封装成类的SGP4 SDP4轨道外推算法 考虑的扰动较多 C++版本-The OrbitTools Libraries NORAD SGP4/SDP4 Implementations in C++

利用两行星历数据，使用SGP4 SDP4外推模型进行轨道计算-The OrbitTools Libraries NORAD SGP4/SDP4 Implementations in C#

轨道坐标系转换，可以用于卫星在轨运行轨道仿真-orbit coordinates transformation , can be used for orbit simulation

The OrbitTools Libraries are implementations of NORAD algorithms for determining satellite location and velocity in Earth orbit. The algorithms come from the December, 1980 NORAD document "Space Track Report No. 3&