Space Object Orbit Prediction Based on Spaceborne Radar
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摘要: 根据天基雷达获取的空间目标位置和速度参数, 研究了计算空间目标轨道根数的方法, 以实现对空间目标的初定轨. 分析了雷达坐标系下对目标的观测误差给协议天球坐标系下的目标参数估计带来的影响. 提出了空间二体相遇问题的一种解决方案. 利用已知的空间站轨道, 仿真分析了空间目标在一周之内和空间站的相遇情况, 同时给出了目标轨道预测的误差分析.Abstract: Method to calculate a space target orbital elements using its position and velocity parameters acquired by spaceborne radar is discussed in this paper. The initial orbit determination is realized consequently. The impact of the measurement errors in the radar coordinate system upon the object's orbital elements in the conventional celestial coordinate system is also analyzed. One solution of the encounter problem of two space objects is given. The Space Station's orbit is used in the simulation part. The encounter of the space station and an object within a week is predicted by the simulation. The orbit forecast error is given.
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Key words:
- Space object /
- Orbital elements /
- Spaceborne radar /
- Orbit prediction /
- Space station
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