P波段SAR图像域极化隔离度影响因素分析  

Analysis of influencing factors of polarization isolation degree in P-band SAR image domain

作　　者：沈明星[1,2,3] 张佳佳 陈曦[1,2] 许涛 冯森[1,2] 武俊杰 SHEN Mingxing;ZHANG Jiajia;CHEN Xi;XU Tao;FENG Sen;WU Junjie(No.38 Research Institute,China Electronic Technology Group Corporation,Hefei 230088,China;Key Laboratory of Aperture Array and Space Application,Hefei 230088,China;University of Electronic Science and Technology of China,Chengdu 610054,China)

机构地区：[1]中国电子科技集团公司第三十八研究所,合肥230088 [2]孔径阵列与空间探测安徽省重点实验室,合肥230088 [3]电子科技大学,成都610054

出　　处：《空天预警研究学报》2022年第2期121-123,共3页JOURNAL OF AIR & SPACE EARLY WARNING RESEARCH

摘　　要：为了充分利用极化SAR数据信息,必须对极化SAR图像进行极化定标.针对P波段极化定标后图像域极化隔离度低的问题,分析了背景杂波和相对仰角对极化特性影响;对角反下地面对交叉极化响应机理进行了分析,提出了极化定标相对仰角改善方法.挂飞试验显示该方法有效提升了P波段图像域极化隔离度.In order to make full use of polarimetric SAR data information,polarimetric SAR images must be polarimetrically calibrated.In view of the problem of low polarization isolation in the image domain after P-band polarimetric calibration,this paper analyzes the influence of background clutter and relative elevation angle on polarization characteristics,then makes analyses on the response mechanism of the cross-polarization in the case of angled reflector,and finally proposes a method of improving the relative elevation angle of polarimetric calibration.The experimental results of hangoff fligh show that the proposed method can effectively improve the polarization isolation in P-band image domain.

关 键 词：机载SAR P波段 极化隔离度 角反 相对仰角 

分 类 号：TN957[电子电信—信号与信息处理]