聚束SAR和对飞机ISAR成像的同和异

Similarity and Difference between Spotlight SAR and Ground-to-air Imaging Radar

聚束照射合成孔径雷达(SAR)是用飞机对某指定大面积区域进行高分辨率成像的合成孔径方式,用地面固定雷达对飞机成像是逆合成孔径方式,两者可用完成不同的成像方法。但也可用相同的“极化形式算法”,可是在具体实现该算法时有较大区别。文中对聚束SAR具体的PFA和它的成像图形以及地面雷达对飞机的PFA给出叙述,并由此可看出它们的差异,最后给出飞机成像图。

Spotlight SAR uses airplane to image large scale ground area with high resolution. Using ground based radar to image aircraft is the so-called ISAR mode. They can use the same Polar Format Algorithm （PFA）, but the actual implementation of that algorithm to realize the imaging formation is quiet different. In this paper, the similarity and difference between them are pointed out.