... 卫星星下点sub-satellite point 卫星运动方程equation of satellite motion 卫星重力梯度测量satellite gradiometry ...
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人造地球卫星运动方程 artificial earth satellite motion equation
推导了协议地球坐标系下的卫星运动方程。
The equation of satellite orbital motion was derived in the conventional terrestrial coordinate system.
首先，目前在卫星动力学中常用的所有人造卫星运动方程的数值解法有待改进的最重要的问题就是稳定性问题。
First, now in all common numerical methods for the satellite dynamics equations the most important problem that needs to be improved is stability problem.
描述人造卫星运动的微分方程非常复杂，不可能给出解的解析表达式。
The differential equations that describe the artificial satellite motion are very complicated, and it is impossible to get the analytic express of solution.
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