基于SAR导引头的弹体定位技术

Missile location based on SAR seeker

采用合成孔径雷达导引头,是提高中远程导弹制导精度的有效途径之一。系统地研究了弹载SAR弹体定位问题,提出了利用弹载SAR的距离-多普勒数据、惯性导航系统输出的导弹速度和高度表测量的导弹高度进行弹体定位的方法,推导了定位的解析公式,避免了不稳定的迭代计算,给出了详细的定位流程。根据当前各分系统能够达到的普遍精度进行了仿真,分析了各误差源对定位精度的影响。

Synthetic aperture radar seeker can effectively improve the guidance accuracy of long-range missiles. The principle, analytical expressions and detailed flow of missile location using range-Doppler domain data provided hy SAR seeker, missile velocity calculated by inertial navigation system and altitude measured by al- timeter are described orderly. Based on simulation, the effects of digital image matching, altitude and velocity errors on the geo-location accuracy are compared.