Retrieving Leaf Area Index With a Neural Network Method: Simulation and Validation

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dc.contributor.authorLiang, Shunlin
dc.contributor.authorFang, Hongliang
dc.date.accessioned2007-02-28T21:01:27Z
dc.date.available2007-02-28T21:01:27Z
dc.date.issued2003-09
dc.description.abstractLeaf area index () is a crucial biophysical parameter that is indispensable for many biophysical and climatic models. A neural network algorithm in conjunction with extensive canopy and atmospheric radiative transfer simulations is presented in this paper to estimateLAIfromLandsat-7 Enhanced ThematicMapper Plus data. Two schemes were explored; the first was based on surface reflectance, and the second on top-of-atmosphere (TOA) radiance. The implication of the second scheme is that atmospheric corrections are not needed for estimating the surface LAI. A soil reflectance index (SRI) was proposed to account for variable soil background reflectances. Ground-measured LAI data acquired at Beltsville, MD were used to validate both schemes. The results indicate that both methods can be used to estimate LAI accurately. The experiments also showed that the use of SRI is very critical.en
dc.description.sponsorshipThis work was supported in part by the U.S. National Aeronautics and Space Administration (NASA) under Grant NAG5-6459 and Grant NCC5462.en
dc.format.extent1517063 bytes
dc.format.mimetypeapplication/pdf
dc.identifier.citationFang, H. and S. Liang, (2003), Retrieving Leaf Area Index With a Neural Network Method: Simulation and Validation, IEEE Transactions on Geoscience and Remote Sensing, 41 (9): 2052-2062.en
dc.identifier.urihttp://hdl.handle.net/1903/4324
dc.language.isoen_USen
dc.publisherInstitute of Electrical and Electronics Engineersen
dc.relation.isAvailableAtCollege of Behavioral & Social Sciencesen_us
dc.relation.isAvailableAtGeographyen_us
dc.relation.isAvailableAtDigital Repository at the University of Marylanden_us
dc.relation.isAvailableAtUniversity of Maryland (College Park, Md.)en_us
dc.rights.licenseCopyright Institute of Electrical and Electronics Engineers.en_us
dc.subjectEnhanced Thematic Mapper Plusen
dc.subjectETM+en
dc.subjectleaf area indexen
dc.subjectLAIen
dc.subjectneural networksen
dc.subjectNNsen
dc.subjectradiative transferen
dc.subjectsoil reflectance indexen
dc.subjectSRIen
dc.titleRetrieving Leaf Area Index With a Neural Network Method: Simulation and Validationen
dc.typeArticleen

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