与全极化相比, 简缩极化合成孔径雷达(SAR)因其更宽的幅宽, 在海洋监视方面具有先天的优势。针对星载简缩极化SAR图像海上舰船目标检测, 在全极化及简缩极化SAR特征参数提取方法研究基础上, 基于实测Radarsat-2全极化数据模拟的混合极化(CTLR)模式简缩极化SAR图像数据, 通过归一化距离对所提取极化特征参数的舰船目标和海杂波背景区分能力进行了系统分析与比较, 在此基础上进一步对全极化及简缩极化的极化特征参数相似性进行了定量分析与评估, 得到简缩极化和全极化的舰船目标检测分析结果。结果表明, 简缩极化SAR的检测性能总体上接近于全极化。

Compared with full polarimetric, compact polarimetric Synthetic Aperture Radar(SAR) has the advantage of providing larger swath. Thus it is very useful in ocean monitoring. Aiming at maritime ship detection based on compact polarimetric spaceborne SAR imagery, this paper constructs compact polarimetric data under Circular Transmit-Linear Receive(CTLR) mode based on the Radarsat-2 full polarimetric data. Conventional extraction methods of spaceborne SAR compact polarimetric features are explored in this paper. The performance results on maritime ship detection based on spaceborne compact polarimetric SAR are obtained. The results show that the overall performance of the detection of compact polarimetric SAR closes to that of full polarization.