修正双尺度模型在非高斯海面散射中的应用

被引:11
作者
郭立新
王运华
吴振森
机构
[1] 西安电子科技大学理学院
关键词
修正双尺度模型; 电磁散射; 非高斯海面;
D O I
10.13443/j.cjors.2007.02.007
中图分类号
TN011 [电波传播、传播机理];
学科分类号
080904 ;
摘要
基于海浪在水平及垂直方向上的倾斜效应,应用修正的双尺度模型求解非高斯海面的电磁散射,在经典的一阶微扰散射系数上添加了一个附加散射系数项,它与非高斯海面的双谱函数成正比,且该项反映了海面后向散射系数在逆风和顺风向上观测结果的不对称性。在修正模型中还考虑了遮蔽函数、曲率效应等因素对散射结果的影响。最后应用修正的双尺度模型数值计算并讨论了非高斯海面后向电磁散射特性,修正模型下的计算结果与实验数据有较好的吻合。
引用
收藏
页码:212 / 218
页数:7
相关论文
共 11 条
  • [1] Abackscat-tering model for ocean surface. Chen K S,Fung A Kand Weissman D E. IEEE Transactions on Geoscience Electronics . 1992
  • [2] Kirchhoff model for a skewed randomsurface. Fung A K,Chen K S. J.of Electromagnetic Waves and Applications . 1991
  • [3] Multispectra for ocean-like randomrough surface scattering. Guissard A. J.of Electromagnetic Waves and Applications . 1996
  • [4] A semi-empirical sea-spectrum model for scattering coefficient esti mation. Fung A K,Lee K. IEEE J.Oceanic Engineering . 1982
  • [5] Fractal model and electromagnetic scattering fromthe ti me-varying sea surface. L X Guo,Z S Wu. IEEE Electronics Letters . 2000
  • [6] A unified directional spectrum for long and short wind-driven waves. Elfouhaily T,Chapron B and Katsaros K. Journal of Geophysical Research . 1997
  • [7] One and two-di-men-sional shadowing functions for any height and slope stationary uncorrelated surface in the monostat-ic and bistatic configurations. Bourlier C,Berginc G,Saillard J. IEEE Trans An-tennas Propagat . 2002
  • [8] On the theory of electromagnetic waves scattering fromthe sea surface at low grazing angles. Voronovich A G. Radio Science . 1996
  • [9] The validity of the Kirchhoff approxi ma-tion for rough surface scattering using a Gaussian roughness spectrum. Thorsos E. The Journal of The Acoustical Society of America . 1988
  • [10] Microwave backscatter fromnon-Gauss-ian seas. McDaniel S T. IEEE Transactions on Geoscience Electronics . 2003