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基于高级积分方程模型(Advanced Integrated Emission Model,AIEM),构建了包含宽范围土壤参数的C波段(6.925GHz)多角度裸露土壤发射率模拟数据库,利用该模拟数据分析了不同观测角度的裸露土壤发射率极化差之间的关系。在此基础上,结合ω-τ零阶辐射传输模型发展了C波段低矮植被光学厚度反演算法,并利用地基微波辐射计观测数据开展了冬小麦的光学厚度反演。结果显示,冬小麦光学厚度反演结果与实测冬小麦LAI在变化趋势上具有较好的一致性,反演算法具有一定的可行性。
Based on the Advanced Integrated Emission Model (AIEM), a simulated C-band (6.925GHz) multi-angle bare soil emissivity simulation database with a wide range of soil parameters was constructed. The simulated soil emissivity The relationship between the rate of polarization difference. On this basis, the optical thickness inversion algorithm of C-band low vegetation was developed based on the zero-order radiative transfer model of ω-τ, and the optical thickness of winter wheat was retrieved using the observation data of ground-based microwave radiometer. The results show that the inversion results of winter wheat and the measured LAI of winter wheat have good consistency, and the inversion algorithm has some feasibility.