A Comprehensive Analysis of Rough Soil Surface Scattering and Emission Predicted by AIEM With Comparison to Numerical Simulations and Experimental Measurements
A Comprehensive Analysis of Rough Soil Surface Scattering and Emission Predicted by AIEM With Comparison to Numerical Simulations and Experimental Measurements
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AIEM预测的粗糙土壤表面散射和发射的综合分析并与数值模拟和实验测量进行比较
DOI：
10.1109/tgrs.2016.2629759
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发表时间：
2017-03
影响因子：
8.2
通讯作者：
Yang Xiaofeng
中科院分区：
文献类型：
--
作者：
Zeng Jiangyuan;Chen Kun-Shan;Bi Haiyun;Zhao Tianjie;Yang Xiaofeng
理论模型作为正问题和反问题在主动和被动微波遥感中起着重要的作用。了解模型的有效性和局限性对于模型的改进至关重要，也许更重要的是模型的应用。在此基础上，本文对已有的理论模型--改进的积分方程组模型(AIEM)预测的粗糙土体表面的散射、后向散射和双基地散射以及发射进行了全面的分析。利用覆盖多种地表参数的数值模拟数据和表征良好的裸露土壤表面的现场测量数据集，评估了AIEM在各种几何参数和地表条件下预测散射系数和微波发射率的性能。结果表明，在角度、频率和偏振相关方面，AIEM的预测结果与数值模拟和实验测量结果基本一致，但在少数情况下(例如，在大入射角和干燥土壤条件下)存在一定的偏差。广泛的比较证实了AIEM对粗糙土壤表面的散射和发射的有效性和实用性。对模型预测与数据之间的差异给出了可能的解释，并对模型的使用和改进提出了建议。
Theoretical modeling plays a significant role as forward and inverse problem in active and passive microwave remote sensing. Understanding the validity and limitations of the models is essential for model refinements and, perhaps more importantly, model applications. Motivated by these, this paper presents a comprehensive analysis of the scattering, both backscattering and bistatic scattering, and emission of rough soil surface predicted by the advanced integral equation model (AIEM), a well-established theoretical model. Numerically simulated data, covering a wide range of surface parameters, and in situ measurement data set of well-characterized bare soil surfaces were used to evaluate the performance of AIEM in predicting the scattering coefficient and microwave emissivity over a wide range of geometric parameters and ground surface conditions. The results show that the AIEM predictions are generally in good consistency with both numerical simulations and experiment measurements in terms of angular, frequency, and polarization dependences, except for some deviations in a few cases (e.g., at large incident angles and dry soil conditions). Extensive comparison confirms the effectiveness and practicability of AIEM for both scattering and emission of rough soil surface. Possible explanations for the discrepancy between the model prediction and data are given, together with suggestions for model usage and refinements.
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DOI：
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发表时间：
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期刊：
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影响因子：
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2001-07
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Waves in Random Media
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