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Radiative transfer model for heterogeneous 3-D scenesA general mathematical framework for simulating processes in heterogeneous 3-D scenes is presented. Specifically, a model was designed and coded for application to radiative transfers in vegetative scenes. The model is unique in that it predicts (1) the directional spectral reflectance factors as a function of the sensor's azimuth and zenith angles and the sensor's position above the canopy, (2) the spectral absorption as a function of location within the scene, and (3) the directional spectral radiance as a function of the sensor's location within the scene. The model was shown to follow known physical principles of radiative transfer. Initial verification of the model as applied to a soybean row crop showed that the simulated directional reflectance data corresponded relatively well in gross trends to the measured data. However, the model can be greatly improved by incorporating more sophisticated and realistic anisotropic scattering algorithms
Document ID
19830031386
Document Type
Reprint (Version printed in journal)
Authors
Kimes, D. S. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Kirchner, J. A. (NASA Goddard Space Flight Center Earth Resources Branch, Greenbelt, MD, United States)
Date Acquired
August 11, 2013
Publication Date
November 15, 1982
Publication Information
Publication: Applied Optics
Volume: 21
Subject Category
EARTH RESOURCES AND REMOTE SENSING
Distribution Limits
Public
Copyright
Other