基于Mathcad（也可转为matlab程序）的旋转系绳系统模型，以牛顿力学建模，考虑系绳弹性，可用于任意开普勒轨道建模仿真。(The Mathcad based model of the rotating tether system, which considers the tether elasticity, can be used for arbitrary Kepler orbit modeling and simulation