太空目标光电监视装备探测精度评估方法

Detection Accuracy Evaluation Method of Space Target Electro-optical Surveillance Equipment

为评估太空目标光电监视装备的探测精度,针对不同数据采样率装备及不同时间间隔的星历真值文件,分析不同阶数拉格朗日插值算法效果。数据试验表明,针对低轨目标(2000 km以下)的星历文件,5阶拉格朗日算法便可满足需求;针对中高轨目标(2000 km以上)星历文件,9阶拉格朗日算法精度最高。针对角度类精度指标计算,提出一种计算角度均值的方法。试验结果表明:该方法能较好地衡量角度均值,为后续角度类指标评估提供有效支撑。

In order to evaluate the detection accuracy of space target electro-optical surveillance equipment,the effect of Lagrange interpolation algorithm with different orders is analyzed for different data sampling rate equipment and ephemeris true value files with different time intervals.The data test shows that the 5-order Lagrangian algorithm can meet the requirements for the LEO ephemeris file(below 2000 km),and the 9-order Lagrangian algorithm has the highest accuracy for the MEO ephemeris file(above 2000 km).Aiming at the calculation of angle accuracy index,a method for calculating the angle mean value is proposed.The experimental results show that the method can measure the mean angle well and provide effective support for the subsequent evaluation of angle indicators.