机载斜侧视SAR带状区域成象

THE STRIP IMAGING OF AIRBORNE SQUINT SIDELOOKING MODE SAR

常用的SAR大都采用正侧视带状区域成象,而机载斜侧视SAR带状区域成象,具有机动性强,应用范围广的特点,但它的处理,理论上为完全的距离方位二维处理。本文从斜侧视SAR的成象工作原理出发,比较了二维FFT算法、快速多项式变换(FPT)方法,以及直接校正后两个独立一维处理方法,讨论了斜侧视SAR成象处理的情况。

Airborne squint mode SAR has the advantages of better flexibility and larger field in applications than the classic sidelooking mode SAR. But the imaging processing of squint mode SAR is a strict two-dimensional phenomenon. This paper compares the 2-D FFT method, fast polynomial transform(FPT) method and two 1-D FFT method for the imaging processing of squint mode SAR.