Electromagnetic Scattering Model for Soybean Canopy

An electromagnetic scattering model for soybean canopy is presented in this paper. For the inter-plant structure, we propose a semi-deterministic description using the antenna array theory to account for the prevailing agriculture practice of soybean. For the underlying rough surface contribution, we employ a recently developed statistical multiple scattering model. For single plant scattering, we adopt the conventional decomposition of the scattering mechanisms. However, in dealing with the ground bounce scattering mechanisms, we use an approach to calculate the roughness modified Fresnel reflection coefficients similar to that of Rodriguez. To validate this proposed model, a comparison is made between the theoretical predictions and polarimetric backscattering measurements. The results show very good agreements between the two and thus clearly demonstrate the validity of this model.

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