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修正双尺度模型在非高斯海面散射中的应用 被引量:12

Application of modified two-scale model for scattering from non-Gaussian sea surface
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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。 Based on the horizontal and vertical skewness of sea waves, a modified two-scale model has been developed for the non-Gaussian sea surface, a complementary term is added to the first-order scattering coefficient of classical SPM (small perturbation method), the additional part is proportional to the surface bispectrum and it is the critical part for explaining the difference between upwind and downwind observations. Meanwhile, in the new modified model, the effects of the shadow function of anisotropic surface, the curvature of the surface on the scattering are also taken into account. Finally, applying the modified two-scale model, numerical illustrations are carried out for the characteristics of the backscattering coefficients from non-Gaussian oceanic surface, good agreements are obtained between the numerical results by the modified model and the measured data.
出处 《电波科学学报》 EI CSCD 北大核心 2007年第2期212-218,共7页 Chinese Journal of Radio Science
基金 国家自然科学基金(60571058) 国防科技预研基金项目 西安电子科技大学研究生创新基金
关键词 修正双尺度模型 电磁散射 非高斯海面 modified two-scale model, electromagnetic scattering, non-Gaussian sea surface
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参考文献16

  • 1Fung A K, Chen K S. Kirchhoff model for a skewed random surface [J]. J. of Electromagnetic Waves and Applications, 1991, 5(2): 205-216.
  • 2L X Guo, Z S Wu. Fractal model and electromagnetic scattering from the time-varying sea surface [J]. IEE of Electronic Letters, 2000, 36(21) : 1810-1812.
  • 3黄际英,吴丛凤.大入射角时海面后向散射系数的计算[J].电波科学学报,1992,7(3):21-28. 被引量:3
  • 4柯熙政 吴振森 宋琨.非高斯粗糙面电磁散射特性高阶矩分析.电波科学学报,:206-206.
  • 5Guissard A. Multispectra for ocean-like random rough surface scattering [J]. J.of Electromagnetic Waves and Applications, 1996, 10(10): 1413-1443.
  • 6Chen K S, Fung A K and Weissman D E. A backscattering model for ocean surface [J]. IEEE Trans Geosci Remote Sensing, 1992, 30(4): 811-817.
  • 7McDaniel S T. Microwave backscatter from non-GaussJan seas [J]. IEEE Trans Geosci Remote Sensing, 2003, 41(1), 51-58.
  • 8李钦,管荣生.双尺度粗糙面的电磁波散射问题[J].电波科学学报,1990,5(3):59-66. 被引量:3
  • 9Fung A K, Lee K. A semi-empirical sea-spectrum model for scattering coefficient estimation [J]. IEEE J. Oceanic Engineering, 1982, OE-7 (4): 166-176.
  • 10Ulaby F T, Moore R K and Fung A K. Microwave Remote Sensing [M]. Vol. Ⅱ (Reading, MA: Addision-Wesbey), 1982.

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