机载SAR的运动误差的二维空变性及其补偿

The Two-Dimensional Spatial-Variant Properties of Airborne SAR Motion Error and Its Compensation

精确的运动补偿是高分辨率机载SAR成像的关键,尤其对于机载小平台和大扰动情况下的成像具有重要意义。为了获得高质量的SAR图像,该文结合波数域算法,考虑运动误差的二维空变性,提出了具体的运动补偿算法,并基于实测数据得到了成像结果。结果显示,该文提出的算法对运动误差有较好的补偿效果。

The precise motion compensation is a crucial issue for high-resolution airborne SAR imaging, which is especially important for SAR imaging under airborne small platform or severe disturbance. In order to obtain high-quality SAR images, combining wavenumber domain algorithm and considering the two-dimensional spatial-variant properties of motion error, practical motion compensation algorithms are put forward in this paper. Simulation and SAR imaging results based on practical measuring data with these algorithms are given to prove the feasibility of this method.