NDLI: Bidirectional reflectance modeling of non-homogeneous plant canopies (Document No: 19860004327)

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Bidirectional reflectance modeling of non-homogeneous plant canopies (Document No: 19860004327)

Content Provider	NASA Technical Reports Server (NTRS)
Copyright Year	1985
Description	The objective of this research is to develop a 3-dimensional radiative transfer model for predicting the bidirectional reflectance distribution function (BRDF) for heterogeneous vegetation canopies. The model (named BIGAR) considers the angular distribution of leaves, leaf area index, the location and size of individual subcanopies such as widely spaced rows or trees, spectral and directional properties of leaves, multiple scattering, solar position and sky condition, and characteristics of the soil. The model relates canopy biophysical attributes to down-looking radiation measurements for nadir and off-nadir viewing angles. Therefore, inversion of this model, which is difficult but practical should provide surface biophysical pattern; a fundamental goal of remote sensing. Such a model also will help to evaluate atmospheric limitations to satellite remote sensing by providing a good surface boundary condition for many different kinds of canopies. Furthermore, this model can relate estimates of nadir reflectance, which is approximated by most satellites, to hemispherical reflectance, which is necessary in the energy budget of vegetated surfaces.
File Size	6171787
Page Count	8
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_19860004327
Archival Resource Key	ark:/13960/t51g5kc62
Language	English
Publisher Date	1985-09-01
Access Restriction	Open
Subject Keyword	Earth Resources And Remote Sensing Atmospheric Effects Earth Resources Program Vegetative Index Canopies Vegetation Backscattering Earth Resources Bidirectional Reflectance Sky Brightness Remote Sensing Solar Position Directivity Soils Leaves Heterogeneity Spectral Emission Angular Distribution Leaf Area Index Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Article

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