【摘要】 建立了一种基于分形树和森林动态生长模型的森林冠层雷达相干散射模型。和非相干散射模型相比,相干散射模型不仅考虑了每个散射体的空间位置信息,还保留了后向散射信号中的相位信息。利用已建立的模型模拟了大兴安岭常青林场某一区域白桦纯林的雷达后向散射信号,验证结果说明模型是可靠的,是可以用来反演森林的几何结构和生物物理参数的。更多还原

【Abstract】 A radar coherent scattering model for forest canopies based on fractal-generated trees and forest dynamics models is established.In order to obtain the position of scatterers,the fidelity of forest structure is simulated by two models: forest dynamics and fractal-generated trees model.Forest dynamics model,ZELIG,can get stand structural composition in some ages.A fractal-generated trees model,L-system,can simulate a 3D tree.Every scatterers are obtained by linking up ZELIG with L-system.Radar coherent scattering model simulates the information of radar backscattering by output of ZELIG and L-system.The prediction results of coherent model is validated by the JERS-1 SAR and Envisat ASAR data from the pure birch of Changqing test site in Daxing’anling.更多还原