期刊名称：ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences
印刷版ISSN：2194-9042
电子版ISSN：2194-9050
出版年度：2007
卷号：XXXVI-7/C50
出版社：Copernicus Publications
摘要：The height of scattering phase center retriev ed from InSAR data is considered to be correlated with tree height and the spatial stru cture of the forest stand. Though some researchers have used simple backscattering models to estimate tree height from the heigh t of scattering center, the effect of forest sp atial structure on InSAR data is not well understood yet. A three-dimensional coherent radar backscattering model for forest canopies based on realistic three-dimensional scenes was used to investigate the effect. A fractal tree model (L-system) was used to simulate individu al 3-D tree structure of different ages or heights. Trees were position ed in a stand in specific patterns resulting in a 3-D mediu m of discrete scatterers. The radar coherent backscatter model used th e 3-D forest scene as input and simulated the coherent radar backscattering signature. Interferometric SAR images of 3D scen es were simulated and heights of scattering phase centers were estimated from the simulated InSAR data. The effects of tree height, and the spatial distribution patterns of trees on the scattering phase center were analyzed and discussed
关键词：3D backscatter model; Forest Spatial Structure; InSAR; Scattering Phase Center
