The angular reflectance signature of the canopy hot spot in the optical regime [electronic resource]
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| Online Access: |
Online Access |
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| Corporate Author: | |
| Format: | Government Document Electronic eBook |
| Language: | English |
| Published: |
Los Alamos, N.M. : Oak Ridge, Tenn. :
Los Alamos National Laboratory ; distributed by the Office of Scientific and Technical Information, U.S. Department of Energy,
1988.
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| Subjects: |
| Abstract: | When any three-dimensional surface, e.g. a plant canopy is illuminated by a directional light source such as the sun, an angular reflectance distribution results that shows a narrow intensity peak in the direction of retro-reflection. This is called the Heiligenschein or hot spot (HS) of vegetation canopies and is caused by the absence of mutual shading of leaves when the observation direction coincides with the illumination direction. The angular intensity distribution of this hot spot, its brightness and contrast against the background, are therefore indicators of the plant's geometry. We show from experimental data and by modeling that the hot spot angular reflectance signature carries information about plant stand architecture that is often more distinctive for different plant species than their spectral signatures. 8 refs., 11 figs. |
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| Item Description: | Published through SciTech Connect. 01/01/1988. "la-ur-88-145" " conf-880154-1" "DE88005385" 4. international colloquium on spectral signatures of objects in remote sensing, Aussois, France, 18 Jan 1988. Gerstl, S.A.W. |
| Physical Description: | Pages: 5 : digital, PDF file. |