具有纹理特征的二维高斯粗糙面单双站极化散射

摘要

A two-dimensional Gauss rough surface characterized by textures is presented and the properties of polarimetric scattering from the surface are studied. Trie rough surface characterized by textures can be obtained through the angle rotating in Fourier transform with the ratio of the two correlation lengths large enough. The scattered field is derived in the Cartesian coordinate system through the integration of scattering facets with the elliptic polarized incidence wave. The polarized radar cross section ( RCS) from the Gaussian rough surface characterized by textures is computed. Several numerical results exhibit the influence of incident angle, texture angle, correlation length and root mean square height on the polarimetric scattering from the texture rough surface.%提出了具有纹理特征的二维高斯粗糙面并研究了其极化散射特性.发现将高斯粗糙面在两个方向上的相关长度的比值取到足够大,能从粗糙面上直观地观察到纹理特征,并且可以利用傅里叶变换中的角度旋转得到任意的纹理走向.通过粗糙面的小面元积分,推导出椭圆极化入射时笛卡尔坐标系下的散射场,并得到了不同纹理特征高斯粗糙面的极化雷达散射截面.数值结果显示了入射角、纹理角、相关长度以及高度起伏均方根对于纹理粗糙面极化散射特性的影响.