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Proceedings Paper

Temporal measurement and analysis of high-resolution spectral signatures of plants and relationships to biophysical characteristics
Author(s): Charles R. Bostater Jr.; Jan Rebbman; Carlton Hall; Mark Provancha; David Vieglais
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Paper Abstract

Measurements of temporal reflectance signatures as a function of growing season for sand live oak (Quercus geminata), myrtle oak (Q. myrtifolia, and saw palmetto (Serenoa repens) were collected during a two year study period. Canopy level spectral reflectance signatures, as a function of 252 channels between 368 and 1115 nm, were collected using near nadir viewing geometry and a consistent sun illumination angle. Leaf level reflectance measurements were made in the laboratory using a halogen light source and an environmental optics chamber with a barium sulfate reflectance coating. Spectral measurements were related to several biophysical measurements utilizing optimal passive ambient correlation spectroscopy (OPACS) technique. Biophysical parameters included percent moisture, water potential (MPa), total chlorophyll, and total Kjeldahl nitrogen. Quantitative data processing techniques were used to determine optimal bands based on the utilization of a second order derivative or inflection estimator. An optical cleanup procedure was then employed that computes the double inflection ratio (DIR) spectra for all possible three band combinations normalized to the previously computed optimal bands. These results demonstrate a unique approach to the analysis of high spectral resolution reflectance signatures for estimation of several biophysical measures of plants at the leaf and canopy level from optimally selected bands or bandwidths.

Paper Details

Date Published: 24 November 1995
PDF: 14 pages
Proc. SPIE 2585, Remote Sensing for Agriculture, Forestry, and Natural Resources, (24 November 1995);
Show Author Affiliations
Charles R. Bostater Jr., Florida Institute of Technology (United States)
Jan Rebbman, Florida Institute of Technology (United States)
Carlton Hall, Dynamac Corp. and NASA Kennedy Space Ctr. (United States)
Mark Provancha, Dynamac Corp. and NASA Kennedy Space Ctr. (United States)
David Vieglais, Dynamac Corp. and NASA Kennedy Space Ctr. (United States)

Published in SPIE Proceedings Vol. 2585:
Remote Sensing for Agriculture, Forestry, and Natural Resources
Edwin T. Engman; Gerard Guyot; Carlo M. Marino, Editor(s)

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