Electromagnetic simulations of radar backscatter from tropical forests: Effects of bio/geo-physical parameters

P. Borderies, A. Hamadi, L. Villard, C. Albinet, T. Koleck
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Abstract

This paper deals with the modelling of time series of polarimetric backscattering and temporal coherence of a tropical forest at P Band. The experimental data show that in the dry season daily cycles of both observables are present and that they are linked to the wind and to the dielectric changes of the canopy. To retrieve these observations, a descriptive model for the forest and an electromagnetic model for the scattering are used. First, canonical studies are carried out about single branches scattering behavior with the goal of highlighting further results. Then, dielectric constant variation and displacements due to the wind are applied to the model and it is shown that they reproduce efficiently the experimental time series.
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热带森林雷达反向散射的电磁模拟:生物/地球物理参数的影响
本文研究了热带森林P波段偏振后向散射和时间相干时间序列的模型。实验数据表明,在旱季,这两种观测值的日循环都存在,并且它们与风和冠层介电变化有关。为了检索这些观测结果,使用了森林的描述模型和散射的电磁模型。首先,为了突出进一步的结果,对单分支散射行为进行了规范研究。然后,将介电常数变化和风引起的位移应用到模型中,结果表明它们能有效地再现实验时间序列。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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