The invention relates to a space target space-based monitoring efficiency evaluation optimization orbit determination method, and belongs to the field of orbit determination. According to the method, firstly, a space-based monitoring satellite orbit determination observation model is established, a Fisher information matrix is constructed through the observation model, and in order to ensure that a selected monitoring satellite has continuous observable arc segments, the monitoring satellite with the shortest observable arc segment is selected as the monitoring orbit determination duration. And then, considering the overall efficiency of the space-based monitoring system in a period of time, providing an observability-based efficiency evaluation index, and reflecting the influence of the selected monitoring satellite combination on the accuracy of space target orbit determination by the value of the index. And finally, providing an optimized satellite selection orbit determination method based on the efficiency evaluation index, firstly calculating efficiency evaluation values of all monitoring satellite combinations by adopting a traversal method, then selecting an optimal monitoring satellite combination with the maximum efficiency evaluation value, and finally performing monitoring orbit determination on a space target by utilizing a nonlinear filtering algorithm. Therefore, the monitoring efficiency of the space-based monitoring system is improved.
本发明涉及一种空间目标天基监测效能评估优化定轨方法,属于轨道确定领域。本发明首先建立天基监测星定轨观测模型,通过观测模型构建Fisher信息矩阵,同时为保证所选监测星有连续的可观测弧段,选择这些监测星中可观测弧段最短的作为监测定轨时长。然后,考虑到一段时间内天基监测系统的整体效能,提出一种基于可观测度的效能评估指标,该指标的值反映了所选监测星组合对空间目标轨道确定的精度影响。最后,基于该效能评估指标提出一种优化选星定轨方法,该方法首先采用遍历法对全部监测星组合的效能评估值进行计算,再选择出具有最大效能评估值的最优监测星组合,最后利用非线性滤波算法对空间目标监测定轨,从而提高此天基监测系统的监测效能。
Space target space-based monitoring efficiency evaluation optimization orbit determination method
空间目标天基监测效能评估优化定轨方法
2024-06-07
Patent
Electronic Resource
Chinese
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