基于非线性海面微波段多普勒回波的建模算法

基于线性波浪理论和尖波模型,分别仿真得到时变线性和非线性海面,并比较了不同海况下两种海面模型的统计特征。采用小斜率近似法求解微波段的电磁散射,并分析了不同条件下的回波多普勒谱。通过采用海浪反演算法验证仿真数据,证明了该建模算法的正确性。结果表明,非线性海浪表现出斯托克斯波浪的典型特性,海面的非线性效应在掠入射时对多普勒谱的影响更显著,并且进行了非线性修正的海面模型的电磁散射特性与实际海况的结果更加吻合。...

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Bibliographic Details
Published in电子技术应用 Vol. 42; no. 5; pp. 97 - 100
Main Author 陈泽宗 张雨薇 赵晨 张龙刚 陈曦
Format Journal Article
LanguageChinese
Published 武汉大学地球空间信息技术协同创新中心,湖北武汉430079%武汉大学电子信息学院,湖北武汉,430072 2016
武汉大学电子信息学院,湖北武汉430072
Subjects
多普勒谱
小斜率近似法
微波散射场
时变海面
非线性海浪
time-evolving ocean surface
非线性海浪
微波散射场
小斜率近似法
多普勒谱
small slope approximation
microwave scattering fields
时变海面
nonlinear sea waves
Doppler spectrum
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Summary:基于线性波浪理论和尖波模型,分别仿真得到时变线性和非线性海面,并比较了不同海况下两种海面模型的统计特征。采用小斜率近似法求解微波段的电磁散射,并分析了不同条件下的回波多普勒谱。通过采用海浪反演算法验证仿真数据,证明了该建模算法的正确性。结果表明,非线性海浪表现出斯托克斯波浪的典型特性,海面的非线性效应在掠入射时对多普勒谱的影响更显著,并且进行了非线性修正的海面模型的电磁散射特性与实际海况的结果更加吻合。
Bibliography:Based on linear wave theory and Choppy Wave Model, this paper simulates linear and nonlinear dynamic sea surface,and compares the statistical characteristics of two ocean models under different sea conditions. Using small slope approximation method to solve the issue of microwave electromagnetic scattering, the article analyzes the echo Doppler spectrum with different factors. By using wave inversion algorithm to verify the simulation data, the modeling algorithm is proved to be correct. Results show that nonlinear waves have typical characteristics of Stokes waves, and nonlinear effects have a more significant influence on doppler spectrum at grazing incidence. The electromagnetic scattering of ocean surface added with nonlinear features are more consistent with sea surface conditions.
nonlinear sea waves;time-evolving ocean surface;small slope approximation;microwave scattering fields;Doppler spectrum
11-2305/TN
Chen Zezong,,Zhang Yuwei,Zhao Chen,Zhang Longgang,Chen Xi（1.School of Electronic Information, Wuhan
ISSN:0258-7998
DOI:10.16157/j.issn.0258-7998.2016.05.027