Effective dielectric constant model of electromagnetic backscattering from stratified air-sea surface film-sea water medium

• 来源期刊: 中国物理B（英文版）
• 关键词: dielectric constant sea surface film electromagnetic backscattering Bragg scattering multiple scattering
• 年，卷（期）: 2017,（5）
• 页码范围: 120-125
• 页数: 6页
• 语种: 英文
• DOI: 10.1088/1674-1056/26/5/054102

摘要

Studies of surface film medium on the sea surface are carried out in this paper for developing the technology to automatically detect and classify sea surface films,and an effective dielectric constant model of electromagnetic backscattering from a stratified air-ocean interface.Numerical results of the new model show the characteristics of effective dielectric constants for the air-sea surface film-sea water medium as follows.The effective dielectric constants decrease with increasing relative dielectric constants of the sea surface films.The effective dielectric constants decrease in horizontal polarization (abbr.HH polarization) and increase in VV vertical polarization (abbr.VV polarization) with increasing radar incident angle.Effective dielectric constants vary with relative sea surface film thickness as a cosinusoidal function of sea surface film thickness.Effective dielectric constant of VV polarization is larger than that of HH polarization.Two potential applications are found with our model,i.e.,the retrieval of dielectric constants from the sea surface film,and the film thickness retrieval with our model.Our model has a highly significant influence on improving the technology related to the remote sensing of sea surface films.