双站SAR图像的极化分析  

Bistatic SAR Polarimetric Analysis

作　　者：徐丰[1] 金亚秋[1] 

机构地区：[1]复旦大学波散射与遥感信息教育部重点实验室,上海200433

出　　处：《电子与信息学报》2009年第1期182-187,共6页Journal of Electronics & Information Technology

基　　金：国家重点基础研究(2001CB309400);国家自然科学基金(40637033;60571050)资助课题

摘　　要：该文对双站SAR(BISAR)模拟图像不同地物的极化特征分析,发现传统单站极化特征参数(α,β,γ)在BISAR图像上不再能有效地表现地物散射的极化特征。由此,提出了统一双站极化基变换,重新定义了极化特征参数α,β,γ,使其保持原有的分离取向关联等优点。经统一双站极化基变换后,不同地物散射的极化特征更明显,重新定义的α,β,γ能反应不同散射机制,提供了BISAR图像解译和地表分类的初步手段。Making use of bistatic SAR image simulation, polarimetric characteristics of BISAR image are studied. It is found that some conventional polarimetric parameters, such as Cloude＇s α,β,γ, for interpretation of monostatic SAR image lose their effectiveness for bistatic case. A transform of the unified bistatic polar bases for BISAR image is presented, and the polarimetric parameters, i.e. α,β,γ, are redefined to preserve their merits of orientation independence. Image simulations show that the polarimetric characteristics of different terrain surfaces are well described using these unified bistatic polar bases, and newly redefined α,β,γ are also applicable to interpret different scattering mechanism. It provides a new way for bistatic image interpretation and information retrievals.

关 键 词：双站极化SAR 模拟双站SAR图像 极化特征分析 

分 类 号：TP722.6[自动化与计算机技术—检测技术与自动化装置]