一种基于分布目标的极化SAR串扰定标方法  

Method for cross-talk calibration of polarimetric SAR using distributed targets

作　　者：谭洪[1,2,3] 洪峻[1,2] 明峰[1,2] 

机构地区：[1]中国科学院电子学研究所,北京100080 [2]微波成像技术国家重点实验室,北京100080 [3]中国科学院研究生院,北京100039

出　　处：《电子测量技术》2008年第7期44-48,55,共6页Electronic Measurement Technology

基　　金：微波成像技术国家重点实验室基金资助(9140C1904020707)

摘　　要：串扰(Cross-talk)定标是极化SAR定标的重要环节,利用自然分布目标进行串扰参数的提取是极化SAR串扰定标方法研究的一个重要方向。本文在深入研究Klein和Quegan方法的基础上,提出了一种新的极化SAR串扰参数提取方法,无需目标的互易性假设,在求解方程组时对各个因子都予以充分的考虑,并采用非迭代算法,不仅能避免计算不收敛的问题,还能有效提高速度。利用ALOSPALSAR全极化数据进行的半物理仿真实验表明,该方法是可行的、有效的。Cross-talk is essential to polarimetric SAR calibration,and much attention is given to the cross-talk calibration using natural distributed targets. A new method for cross-talk calibration of polarimetric SAR is stated in this paper, after careful research on Klein＇ s and Quegan＇ s algorithms. The method does not need the backscatter reciprocity assumption any more, and gives full consideration to all of the items in the equations to retrieve cross-talk parameters. The algorithm stated here is non-iterative, which can not only avoid the problem of divergence, but can also reduce the time needed for the cross-talk calibration. The method is verified with applications to the ALOS PALSAR data.

关 键 词：合成孔径雷达 极化SAR 串扰定标 分布目标 

分 类 号：TN957.52[电子电信—信号与信息处理]