近程合成孔径雷达子孔径数据的成像处理

Subaperture Data Imaging of Short-Range SAR

研究了近程 SAR的子孔径数据成像问题。通过对 SAR子孔径数据进行的聚束处理 ,在短时间完成对波束覆盖的目标区域成像并形成“快视”,从而降低成像对 SAR载体运动补偿的要求。为解决近距离大前斜视角成像问题并避免复杂的插值计算 ,成像算法采用了基于波前重构理论的精确的 Range Stacking算法。仿真和实际飞行试验数据的成像处理结果证明了本文方法的有效性。

The subaperture data imaging problem of short-range SAR is investigated. By spotlight processing the subaperture data, the quick look imaging of scenery covered by antenna beam is completed in a short time with less requirements of motion compensation for SAR's carrier. Based on wavefront reconstruction theory, the range stacking algorithm without complicated interpolation is used for accurate image formation with a large squint angle in short-range. The processing results of simulation data and real data verify the effectiveness of the method.