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A three dimensional radiative transfer method for optical remote sensing of vegetated land surfacesIn the application of remote sensing at optical wavelengths to vegetated surfaces from satellite borne high resolution instruments, an understanding of the various physical mechanisms that contribute to the measured signal is important. A numerical method of solving the radiative transfer equation in three dimensions is reported. The reliability of coding and accuracy of the algorithm are evaluated by benchmarching. Parametrization of the methods and results of a simulation are presented. The method is tested with experimental data of canopy bidirectional reflectance factors. The effect of spatial heterogeneity on the relationship between the simple ratio and normalized vrs absorbed Photosynthetically Active Radiation (PAR) is discussed.
Document ID
19920002248
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Asrar, Ghassem
(NASA Headquarters Washington, DC United States)
Myneni, Ranga B.
(NASA Headquarters Washington, DC United States)
Choudhury, Bhaskar J.
(NASA Goddard Space Flight Center Greenbelt, MD., United States)
Date Acquired
September 6, 2013
Publication Date
May 1, 1991
Publication Information
Publication: ESA, Physical Measurements and Signatures in Remote Sensing, Volume 1
Subject Category
Earth Resources And Remote Sensing
Accession Number
92N11466
Distribution Limits
Public
Copyright
Other

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