高分辨率星载合成孔径雷达成像处理方法

High Resolution Spaceborne SAR Imaging and Image Postprocess

提出了一种适用于大距离徒动高分辨率星载合成孔径雷达 (SAR)精确成像的改进Chirp Scaling(CS)成像处理算法 ,以及实现单视图象斑点噪声抑制的基于目标检测的增强无偏最大后验概率 (TDRGMAP)方法。采用这种高精度成像处理方法和单视图像斑点噪声抑制方法 ,可以实现星载 SAR高空间分辨率和高辐射分辨率的雷达图像。

In this paper,a refined chirp scaling (CS) algorithm which is suitable for precise imaging of high resolution spaceborne synthetic aperture radar(SAR) with large range cell migration is presented.And a method,named TDRGMAP,is developed for speckle reduction of high resolution one look spaceborne SAR images.Using the high precise imaging algorithm and the speckle reduction method for one look image,we can make radar images with high spatial resolution and high radiometric resolution.