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首页> 外文期刊>IEEE Transactions on Geoscience and Remote Sensing >Modeling Land Surface Roughness Effect on Soil Microwave Emission in Community Surface Emissivity Model
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Modeling Land Surface Roughness Effect on Soil Microwave Emission in Community Surface Emissivity Model

机译：在群落表面发射率模型中模拟土地表面粗糙度对土壤微波辐射的影响

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摘要

Soil surface roughness is a crucial factor affecting the land surface microwave emissivity. Presented in this paper is a semiempirical model that analytically accounts for both roughness attenuation and cross-polarization-mixing effects in the frequency range of 1–100 GHz. The model is based on the finite linear superposition of hyperbolic tangent (tanh) functions over the normalized surface roughness and radiative parameter space, which proves to be very flexible and efficient in handling the distinct asymptotic features of roughness effects at the low-frequency end and high-frequency end and the nonlinear structure in between. The model performance was analyzed with the ground-based reflectivity measurements collected from different sources. In comparison with the existing semiempirical models in the literature, the new tanh-based roughness model demonstrated higher accuracy and consistent performance in the frequency range of 1.4–100 GHz and incident angles.
机译：土壤表面粗糙度是影响陆地表面微波发射率的关键因素。本文介绍的是一个半经验模型，该模型分析性地说明了1-100 GHz频率范围内的粗糙度衰减和交叉极化混合效应。该模型基于双曲正切（tanh）函数在归一化表面粗糙度和辐射参数空间上的有限线性叠加，这被证明在处理低频端和低频端粗糙度效应的明显渐近特征时非常灵活和有效。高频端和非线性结构之间。使用从不同来源收集的地面反射率测量值分析了模型性能。与文献中现有的半经验模型相比，新的基于tanh的粗糙度模型在1.4–100 GHz频率范围和入射角下显示出更高的精度和一致的性能。

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