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Determining experimentally induced variation in coniferous canopy chemistry with Airborne Imaging Spectrometer dataExperimental treatments in a Douglas-fir forest in NE New Mexico were carried out to determine whether differences in forest canopy chemistry could be detected using data from the Airborne Imaging Spectrometer (AIS-2). Experimental treatments consisted of nitrogen fertilizer additions, sawdust additions, and control plots. After AIS-2 data were collected, the digital number of a given pixel was extracted from each channel, yielding 128 values that were used to form a spectrum. Four spectra were extracted from each treatment plot. Multiple stepwise linear regressions between first and second difference transformations of AIS-2 spectra and the canopy characteristics of biomass, nitrogen concentration, and nitrogen content were performed. The results showed a coefficient of multiple determination of 0.71 between first-difference AIS-2 spectra and measured nitrogen concentration in foliage, indicating that it may be possible to predict nitrogen concentration in Douglas fir using AIS-2 spectra.
Document ID
19910031241
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Swanberg, N. A.
(NASA Ames Research Center; TGS Technology, Inc. Moffett Field, CA, United States)
Matson, P. A.
(NASA Ames Research Center Moffett Field, CA, United States)
Date Acquired
August 15, 2013
Publication Date
January 1, 1989
Subject Category
Earth Resources And Remote Sensing
Accession Number
91A15864
Distribution Limits
Public
Copyright
Other

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