NDLI: A microwave scattering model for layered vegetation

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A microwave scattering model for layered vegetation

Content Provider	NASA Technical Reports Server (NTRS)
Author	Fung, Adrian K. Chauhan, Narinder S. Karam, Mostafa A. Lang, Roger H.
Copyright Year	1992
Description	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 this model with measurements from deciduous and coniferous forests show good agreements at several frequencies for both like and cross polarizations. Major features of the model needed to realize the agreement include allowance for: (1) branch size distribution, (2) second-order effects, and (3) tree component models valid over a wide range of frequencies.
File Size	2216294
Page Count	34
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_19930008885
Archival Resource Key	ark:/13960/t9576bg0x
Language	English
Publisher Date	1992-12-10
Access Restriction	Open
Subject Keyword	Earth Resources And Remote Sensing Microwave Scattering Polarization Size Distribution Canopies Vegetation Deciduous Trees Scattering Coefficients Conifers Radiative Transfer Mathematical Models Surface Roughness Frequency Ranges Remote Sensing Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Technical Report

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