Directional Radiance Distributions Above And Witihn A Forest Canopy

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dc.contributor.authorDeering, D. W.
dc.contributor.authorEck, Thomas
dc.date.accessioned2024-04-29T17:00:30Z
dc.date.available2024-04-29T17:00:30Z
dc.date.issued1990-05-20
dc.description10th Annual International Symposium on Geoscience and Remote Sensing, 20-24 May 1990, College Park, MD, USA
dc.description.abstractA multidirectional field radiometer was adapted for measuring directional radiances both above and below a boreal forest canopy to examine the total forest canopy system optical-reflective radiative transfer characteristics and to validate plant canopy models. Analyses of the reflected radiances above the canopy reveal a highly anisotropic bidirectional reflectance distribution function (BRDF) with a sub­stantial forwardscatler but a considerably stronger backscatter. The characteristics of the forest BRDF vary with solar zenith angle, as has been observed to be the usual case in all other green plant canopies previously examined. However, the anisotropy was found to be considerably greater at the larger solar zenith angles for the Maine spruce-hemlock forest than has been observed for other land surfaces, at least for the limited range of solar zeniths available in September. But at the smaller solar zenith angles, the forest was found to have slightly less anisotropy in the near-infrared spectral band than a scrub oak plant community and less anisotropy than a prairie grassland. Keywords: Bidirectional reflectance, BRDF, boreal forest, anisotropy, transmittance.
dc.description.urihttps://ieeexplore.ieee.org/abstract/document/688629
dc.format.extent4 pages
dc.genreconference papers and proceedings
dc.identifierdoi:10.13016/m2ku6t-pntx
dc.identifier.citationDeering, D.W., and T.F. Eck. “Directional Radiance Distributions Above And Witihn A Forest Canopy.” 10th Annual International Symposium on Geoscience and Remote Sensing, May 1990, 879–82. https://doi.org/10.1109/IGARSS.1990.688629.
dc.identifier.urihttps://doi.org/10.1109/IGARSS.1990.688629
dc.identifier.urihttp://hdl.handle.net/11603/33333
dc.language.isoen_US
dc.publisherIEEE
dc.relation.isAvailableAtThe University of Maryland, Baltimore County (UMBC)
dc.relation.ispartofUMBC GESTAR II
dc.rightsThis work was written as part of one of the author's official duties as an Employee of the United States Government and is therefore a work of the United States Government. In accordance with 17 U.S.C. 105, no copyright protection is available for such works under U.S. Law.
dc.rightsPublic Domain
dc.rights.urihttps://creativecommons.org/publicdomain/mark/1.0/
dc.subjectOptical sensors
dc.subjectAnisotropic magnetoresistance
dc.subjectBidirectional control
dc.subjectArea measurement
dc.subjectDistribution functions
dc.subjectEarth
dc.subjectLand surface
dc.subjectRadiometry
dc.subjectRemote monitoring
dc.subjectSatellite broadcasting
dc.titleDirectional Radiance Distributions Above And Witihn A Forest Canopy
dc.typeText
dcterms.creatorhttps://orcid.org/0000-0001-9801-1610

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