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Method for determining surface coverage by materials exhibiting different fluorescent propertiesAn improved method for detecting, measuring, and distinguishing crop residue, live vegetation, and mineral soil is presented. By measuring fluorescence in multiple bands, live and dead vegetation are distinguished. The surface of the ground is illuminated with ultraviolet radiation, inducing fluorescence in certain molecules. The emitted fluorescent emission induced by the ultraviolet radiation is measured by means of a fluorescence detector, consisting of a photodetector or video camera and filters. The spectral content of the emitted fluorescent emission is characterized at each point sampled, and the proportion of the sampled area covered by residue or vegetation is calculated.
Document ID
19950021790
Acquisition Source
Legacy CDMS
Document Type
Other - Patent
Authors
Chappelle, Emmett W. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Daughtry, Craig S. T. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Mcmurtrey, James E., III (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Date Acquired
August 16, 2013
Publication Date
May 2, 1995
Subject Category
Earth Resources And Remote Sensing
Report/Patent Number
Patent Number: US-PATENT-5,412,219
Patent Number: NASA-CASE-GSC-13539-1
Patent Application Number: US-PATENT-APPL-SN-155605
Accession Number
95N28211
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
Patent
US-PATENT-5,412,219|NASA-CASE-GSC-13539-1
Patent Application
US-PATENT-APPL-SN-155605

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