如果知道R，就能，计算轨道里的速度。
本文提出了满足设计要求的地球资源卫星轨道参数的计算方法。
The paper offers the computation method of Earth Resources Technology Satellite orbit meeting the requirements.
并给出了适合于沿铁路轨道进行视点计算的数据结构。
A path data structure is given to calculate the viewpoint along railway with cross.
研究了标称飞行轨道最优交会点选取，交会时间与发射时间计算等问题。
The ideal rendezvous time, launch time and rendezvous point in space were studied.
研究了标称飞行轨道最优交会点选取，交会时间与发射时间计算等问题。
The ideal rendezvous time, launch time and rendezvous point in space were studied.
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