根据能量和动量矩讨论地球人造卫星的轨道问题

A Discussion of the Elliptic Orbits of Artificial Earth satellite on Energy and Angular Momentum

本文依据椭圆轨道半长轴和半正焦弦跟卫星能量及动量矩之间存在简单关系，分别讨论了卫星能量一定时的可能轨道和动量矩一定时的可能轨道。使轨道问题易于把握。

This paper discusses separately the possible elliptic orbits of artificial earth satellite which energy or angular momentum is constant,according to facts that the major semiaxis of an orbit depends on the energy of satellite and the focus parameter of the orbit depends on the one’s angular momentum.So the orbit’s problem become understood and grasped with ease.