Geometric configuration of imaging varies significantly over time in squinted synthetic aperture radar(SAR) when platform is under maneuvering flight.The classic resolution analysis in the traditional SAR is not suitable in this case.In order to illustrate a general description of the resolution characteristics of the system,a resolution analysis method based on distinguishable ellipse in squinted SAR under different geometric configurations is presented,which finds the optimal synthetic aperture of target identification by estimating the area of distinguishable ellipse.The simulation results show that this method is adaptive to conditions of different flight parameters and geometric configurations in squinted SAR under maneuvering flight.%在机动飞行的前斜合成孔径雷达(SAR)系统中,成像的几何构型随时间显著变化,传统的分辨率分析方法不适用于这种情况.为了描述该系统下的分辨率特性,提出了一种基于分辨椭圆的计算不同几何构型下的前斜SAR分辨率的方法,通过评估分辨椭圆面积找到目标识别最优位置.仿真结果表明,该方法适用于不同飞行参数和几何构型条件下的机动飞行的前斜SAR分辨率分析.
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