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A microwave scattering model for layered vegetation

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4 Author(s)
Karam, M.A. ; Dept. of Electr. Eng., Texas Univ., Arlington, TX, USA ; Fung, A.K. ; Lang, R.H. ; Chauhan, N.S.

A microwave scattering model was developed for layered vegetation based on an iterative solution of the radiative transfer equation up to the second order to account for multiple scattering within the canopy and between the ground and the canopy. The model is designed to operate over a wide frequency range for both deciduous and coniferous forest and to account for the branch size distribution, leaf orientation distribution, and branch orientation distribution for each size. The canopy is modeled as a two-layered medium above a rough interface. The upper layer is the crown, containing leaves, stems, and branches. The lower layer is the trunk region, modeled as randomly positioned cylinders with a preferred orientation distribution above an irregular soil surface. Comparisons of results obtained using this model with measurements from deciduous and coniferous forests show good agreement at several frequencies for both like and cross polarizations

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Geoscience and Remote Sensing, IEEE Transactions on  (Volume:30 ,  Issue: 4 )