Further numerical studies of backscattering from time-evolving nonlinear sea surfaces
Further numerical studies of backscattering from time-evolving nonlinear sea surfaces
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DOI：
10.1109/tgrs.2003.814662
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发表时间：
2003-10
期刊：
影响因子：
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通讯作者：
Alfonso R. Hayslip;J. Johnson;G. Baker
中科院分区：
文献类型：
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作者：
Alfonso R. Hayslip;J. Johnson;G. Baker
先前的研究表明，西方等人。 (1987) 与线性海面演化模型相比，海面非线性水动力演化的数值模型在计算的 L 波段反向散射多普勒频谱中产生了显着的特征。然而，由于 West 等人的失败，这些先前的比较仅限于最大风速 2.0 m/s。当陡峭的短波特征在表面形成时的算法。在本文中，L 波段多普勒频谱与 West 等人。据报道，模型的风速高达 5.0 m/s，通过使用曲率滤波器来减少这些陡峭的短波。更高的风速结果再次显示出与线性流体动力学模型报告的显着偏差，包括增加的光谱展宽和偏振依赖性。
Previous studies have demonstrated that the West et al. (1987) numerical model for nonlinear hydrodynamic evolution of a sea surface produces significant features in calculated L-band backscattered Doppler spectra compared to a linear sea surface evolution model. These prior comparisons were limited, however, to a maximum wind speed of 2.0 m/s due to failure of the West et al. algorithm when steep short-wave features formed on the surface. In this paper, L-band Doppler spectra with the West et al. model are reported for wind speeds up to 5.0 m/s through the use of a curvature filter to reduce these steep short waves. The higher wind speed results again show significant deviations from those reported with a linear hydrodynamic model, including increased spectral broadening and polarization dependencies.