基于SFS技术的全极化SAR图像海浪反演机制  

Mechanism of Ocean Wave Spectra Retrieval from Full SAR Images with Shape from Shading Technology

作　　者：谢涛[1] 方贺[1] 陈伟[2] 赵尚卓 于文金 

机构地区：[1]南京信息工程大学海洋科学学院,江苏南京210044 [2]武汉理工大学自动化学院,湖北武汉430070

出　　处：《武汉理工大学学报（信息与管理工程版）》2015年第3期259-263,共5页Journal of Wuhan University of Technology：Information & Management Engineering

基　　金：国家自然科学基金资助项目(41276187);南京信息工程大学引进人才基金资助项目(20110310);江苏省高层次创新创业人才(双创团队)引进计划专项基金资助项目;中法海洋卫星科研基金资助项目(CFOSAT)

摘　　要：从机理上对基于阴影恢复形状技术(shape from shading,SFS)全极化SAR海浪谱反演方法的可行性进行了理论论证。结果表明,利用全极化SAR图像计算方位角漂移时,实际上隐含了速度聚束调制。除方位角处于90°附近很窄范围内的情形,流体动力学调制机制的影响可以忽略。通过对比不同极化模式数值模拟结果发现,将HH极化图像强度应用于SFS技术公式时,比采用VV极化图像强度所得的结果精度高,特别是在方位角ψ值较大时,采用HH极化SAR图像的优势更为明显。Intend to develop a novel method of ocean wave spectra retrieving with full SAR images based on shape from shading（ SFS） combining with numerical simulating,feasibility of the new method was theoretically validated in this paper. The velocity bunching was implicit in the equation of orientation angle with full SAR images. Numerical simulating results show that hydrodynamic effect can be neglected in the method except for the case when ocean waves propagate along a very small angular interval around the range direction（ orientation angle is 90°）. Compared results of applying HH polarization SAR image into SFS with those of VV polarization SAR image,especially when the orientation angleψis large,HH polarization has the higher accuracy than that of VV polarization.

关 键 词：阴影恢复形状技术 合成孔径雷达 海浪反演 雷达散射截面 速度聚束调制 

分 类 号：TM912.9[电气工程—电力电子与电力传动]