An angular cutoff composite model for investigation on electromagnetic scattering from two-dimensional rough sea surfaces

doi:10.1088/1674-1056/19/7/074101

中国物理B ›› 2010, Vol. 19 ›› Issue (7): 74101-074101.doi: 10.1088/1674-1056/19/7/074101

An angular cutoff composite model for investigation on electromagnetic scattering from two-dimensional rough sea surfaces

聂丁, 张民

School of Science, Xidian University, Xi'an 710071, China

出版日期:2010-07-15 发布日期:2010-07-15
基金资助:
Project supported by the National Natural Science Foundation of China (Grant No. 60871070), the National Pre-research Foundation and the Foundation of the National Electromagnetic Scattering Laboratory.

An angular cutoff composite model for investigation on electromagnetic scattering from two-dimensional rough sea surfaces

Nie Ding(聂丁) and Zhang Min(张民)^†

School of Science, Xidian University, Xi'an 710071, China

Online:2010-07-15 Published:2010-07-15
Supported by:
Project supported by the National Natural Science Foundation of China (Grant No. 60871070), the National Pre-research Foundation and the Foundation of the National Electromagnetic Scattering Laboratory.

摘要/Abstract

摘要： Based on the local configuration angle division to select the corresponding method for electromagnetic scattering calculation from rough sea surface, this paper presents an angular cutoff composite model: when the local scattered angle is in the specular region that is given by an approximately 20 degrees cone around the specular direction, the Kirchhoff approximation is applied to evaluate the specular reflection, which dominates the total scattering in this region; the small perturbation method is employed to handle the diffuse reflection which is predominant as the local scattered angle is situated out of the specular region. Numerical results are compared with those of experimental and theoretical models in several configurations as a function of incident angle, wind speed, wind direction. The comparison of numerical results of other experimental and theoretical models in several configurations shows that the new composite model is robust to give accurate numerical evaluations for the sea surface scattering.

Abstract: Based on the local configuration angle division to select the corresponding method for electromagnetic scattering calculation from rough sea surface, this paper presents an angular cutoff composite model: when the local scattered angle is in the specular region that is given by an approximately 20 degrees cone around the specular direction, the Kirchhoff approximation is applied to evaluate the specular reflection, which dominates the total scattering in this region; the small perturbation method is employed to handle the diffuse reflection which is predominant as the local scattered angle is situated out of the specular region. Numerical results are compared with those of experimental and theoretical models in several configurations as a function of incident angle, wind speed, wind direction. The comparison of numerical results of other experimental and theoretical models in several configurations shows that the new composite model is robust to give accurate numerical evaluations for the sea surface scattering.

Key words: electromagnetic scattering, composite surface model, rough sea surface, angular cutoff

中图分类号: (Upper ocean and mixed layer processes)

92.10.Fj

41.20.Jb (Electromagnetic wave propagation; radiowave propagation)

聂丁, 张民. An angular cutoff composite model for investigation on electromagnetic scattering from two-dimensional rough sea surfaces[J]. 中国物理B, 2010, 19(7): 74101-074101.

Nie Ding(聂丁) and Zhang Min(张民). An angular cutoff composite model for investigation on electromagnetic scattering from two-dimensional rough sea surfaces[J]. Chin. Phys. B, 2010, 19(7): 74101-074101.

参考文献 19

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An angular cutoff composite model for investigation on electromagnetic scattering from two-dimensional rough sea surfaces

An angular cutoff composite model for investigation on electromagnetic scattering from two-dimensional rough sea surfaces

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