VRT和M-G模型对含泡沫海面电磁散射特性的修正效应研究

Modification on Electromagnetic Scattering Characteristics from Foam Sea Surface by VRT and M-G Model

为了研究高频段高海情下海面电磁散射,须将泡沫的电磁散射引入到海面电磁散射计算中。本文基于小斜率近似方法,分别采用矢量辐射传输理论、Maxwell-Garnett模型,对小入射角和中低掠入射下风驱粗糙海面覆盖泡沫层的泡沫-海面复合模型的电磁散射系数进行了修正。修正后的数值计算结果与相关文献的实验值吻合较好,弥补了小斜率近似方法在某些场景中的局限性。

The electromagnetic scattering of foam should be considered into the calculation of electromagnetic scattering from sea surface for high frequency and high sea state. Based on the small slope approximation method,the electromagnetic scattering coefficients of the foam-sea composite model under the small incident angle and the moderate and low grazing incidence are modified by the vector radiation transmission theory and the Maxwell-Garnett model,respectively. The modified numerical results are agreed with the experimental data of the related literatures,and the limitations of the small slope approximation method in some scenarios are compensated.