炮位侦校雷达定位精度影响因素分析

Analysis on the Factors Influencing Positioning Accuracy of Firefinder Radar

炮位侦察校射雷达弹道外推算法受多种因素影响。为满足弹道外推分析、进一步提高外推精度的需求,详细建模分析地球曲率、时间不同步、弹道模型误差、信噪比变化等影响炮位侦校雷达定位精度的因素。结合精密雷达测量数据和无迹卡尔曼滤波外推算法进行仿真,量化评价各因素对外推精度的影响。通过理论建模与仿真实验,将考虑各种影响因素与否的情况详细分析对比,得到各因素对定位精度影响程度从大到小依次为:地球曲率、时间不同步、弹道模型误差、信噪比变化。在此基础上,提出了考虑多种因素的炮位侦校雷达弹道外推改进方法。

The extrapolation algorithm of the firefinder radar is affected by many factors.To meet the needs of the subsequent ballistic analysis, the factors which affects the positioning accuracy in the firefinder radar data processing system are analyzed in detail, such as earth curvature, asynchronous time, model error, signal to noise ratio, et al. Simulation is carried out by combining high precision radar measurement data and seven-state filtering algorithm. The effects of various influencing factors on extrapolation precision are quantitatively evaluated. The sequence of these factors is given according to their influence degrees on the positioning accuracy as : earth curvature, asynchronous time, model error, and signal to noise ratio.On this basis, an improved method of tra-jectory extrapolation for firefinder radar is proposed.