Electromagnetic backscattering from one-dimensional drifting fractal sea surface Ⅱ：Electromagnetic backscattering model

作     者：谢涛 William Perrie 赵尚卓 方贺 于文金 何宜军 Tao Xie;William Perrie;Shang-Zhuo Zhao;He Fang;Wen-Jin Yu;Yi-Jun He

作者机构：School of Marine Sciences Nanjing University of Information Science and Technology Nanjing 210044 China Jiangsu Engineering Technology Research Center of Marine Environment Detection Nanjing 210044 China Bedford Institute of Oceanography B2 Y 4A2 Dartmouth NS Canada 

出 版 物：《Chinese Physics B》 (中国物理B（英文版）)

年 卷 期：2016年第25卷第6期

页      面：214-219页

核心收录：

学科分类：0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 

基　　金：Project supported by the National Natural Science Foundation of China(Grant No.41276187) the Global Change Research Program of China(Grant No.2015CB953901) the Priority Academic Program Development of Jiangsu Higher Education Institutions,China the Program for the Innovation Research and Entrepreneurship Team in Jiangsu Province,China the Canadian Program on Energy Research and Development the Canadian World Class Tanker Safety Service Program 

主　　题：fractal ocean current electromagnetic scattering normalized radar cross section(NRCS) 

摘      要：Sea surface current has a significant influence on electromagnetic（EM） backscattering signals and may constitute a dominant synthetic aperture radar（SAR） imaging mechanism. An effective EM backscattering model for a one-dimensional drifting fractal sea surface is presented in this paper. This model is used to simulate EM backscattering signals from the drifting sea surface. Numerical results show that ocean currents have a significant influence on EM backscattering signals from the sea surface. The normalized radar cross section（NRCS） discrepancies between the model for a coupled wavecurrent fractal sea surface and the model for an uncoupled fractal sea surface increase with the increase of incidence angle,as well as with increasing ocean currents. Ocean currents that are parallel to the direction of the wave can weaken the EM backscattering signal intensity, while the EM backscattering signal is intensified by ocean currents propagating oppositely to the wave direction. The model presented in this paper can be used to study the SAR imaging mechanism for a drifting sea surface.