海洋内波对海面电磁散射特性的影响分析

魏仪文; 郭立新; 殷红成

doi:10.12000/JR15060

海洋内波对海面电磁散射特性的影响分析

DOI: 10.12000/JR15060

1.
(西安电子科技大学综合业务网理论及关键技术国家重点实验室西安 710071)
2.
(西安电子科技大学物理与光电工程学院西安 710071)
3.
(电磁散射重点实验室北京 100854)

基金项目:

自然科学基金杰出青年科学基金(61225002)和中央高校业务费资助课题

详细信息

作者简介:
魏仪文(1988-),女,陕西咸阳人,现为西安电子科技大学物理与光电工程学院博士生,研究方向为计算电磁学、复杂海面的电磁散射.E-mail:wei_yiwen@163.com郭立新(1968-),男,博士,无线电物理学科博士生导师,西安电子科技大学物理与光电工程学院执行院长,主要研究方向为复杂目标与地海环境电磁散射特性、随机介质中的电波传播特性等.E-mail:lxguo@xidian.edu.cn殷红成(1967-),男,研究员,专业总师,博士生导师,主要研究兴趣为电磁散射、雷达目标特性、目标识别等.E-mail:yinhc207@yahoo.com.cn

通讯作者:
魏仪文wei_yiwen@163.com

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出版历程
- 收稿日期: 2015-05-18
- 修回日期: 2015-06-15
- 网络出版日期: 2015-06-28

Analysis of the Scattering Characteristics of Sea Surface with the Influence from Internal Wave

1.
(State Key Laboratory of Integrated Services Networks, Xidian University, Xi'an 710071, China)
2.
(School of Physics and Optoelectronic Engineering, Xidian University, Xi'an 710071, China)
3.
(National Electromagnetic Scattering Laboratory, Beijing 100854, China)

摘要

摘要: 海洋内波通常在海面之下传播,并通过波流相互作用影响海洋表面毛细波的分布,在合成孔径雷达(SAR)图像中表现为亮暗相间的纹理.该文首先基于Korteweg-de Vries(KdV)方程,建立内波传播模型;通过波流相互作用函数,基于波作用量方程,对表面毛细波的波谱进行修正;最后基于双尺度方法的面元模型,将内波对高频谱的修正作用考虑在内,计算内波的存在对大尺寸海面电磁散射特性的影响.文中计算了内波存在时海面散射系数分布,分析了不同的内波参数,不同海况参数等对海面散射系数和多普勒的影响.
- 海洋内波 /
- 电磁散射 /
- 多普勒谱
Abstract: The internal wave travels beneath the sea surface and modulate the roughness of the sea surface through the wave-current interaction. This makes some dark and bright bands can be observed in the Synthetic Aperture Radar (SAR) images. In this paper, we first establish the profile of the internal wave based on the KdV equations; then, the action balance equation and the wave-current interaction source function are used to modify the sea spectrum; finally, the two-scale theory based facet model is combined with the modified sea spectrum to calculate the scattering characteristics of the sea. We have simulated the scattering coefficient distribution of the sea with an internal wave traveling through. The influence on the scattering coefficients and the Doppler spectra under different internal wave parameters and sea state parameters are analyzed.
- Internal wave /
- Electromagnetic scattering /
- Doppler spectrum

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参考文献(16)

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