董召勇,徐融,郭海波

• 1:上海卫星工程研究所

摘要(Abstract)：

针对空间碎片在轨精确定位需求，系统总结了采用天基光学探测和激光测距对空间碎片运动状态初值的求解方法；立足在轨应用，文章提出了基于天基光学探测和激光测距的空间碎片运动状态扩展卡尔曼滤波(EKF)估计方法，以目标定位精度为评价标准，研究了探测体制、测量数据精度、测量数据率和探测距离等因素对目标定位性能的影响，并提出了定位参数最优的水平选择。数学仿真结果表明：在特定载荷性能下，采用双星光学测量体制，碎片位置估计精度优于79.4 m,速度估计精度优于3.5 m/s;采用单星光学测量加激光测距体制，碎片位置估计精度优于124.3 m,速度估计精度优于4.5 m/s。该方法具有求解精度高、运行稳定性好和数据计算量低等优点，具备在轨应用的条件，可为面向空间碎片的天基跟踪系统设计提供参考。

关键词(KeyWords)： 空间碎片;目标定位;光学探测;激光测距;扩展卡尔曼滤波

Abstract:

Keywords:

基金项目(Foundation):

作者(Author): 董召勇,徐融,郭海波

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