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Polarimetric radar measurements of a forested area near Mt. ShastaThe authors present the results of an experiment using the NASA/JPL DC-8 AIRSAR (aircraft synthetic-aperture radar) over a coniferous forest near Mt. Shasta (California) in 1989. Calibration devices were deployed in clearings and under the forest canopy and passes at 20, 40, and 55 deg incidence angles were made with the AIRSAR. A total of eight images at differing incidence angles have been processed and calibrated. The multipolarization, multifrequency data were examined, and it was found that the C-band cross section averaged over like and cross polarizations is the best parameter for distinguishing between two stands with differing forest biomass. The average cross section at P- and L-bands is useful only for smaller incidence angles. Parameters describing the polarization behavior of the scattering were primarily useful in identifying the dominant scattering mechanisms for forest backscatter. It was found that both branch scattering and ground/tree interactions are important at P-band. At L-band and C-bands, the return is primarily from the canopy. Comparison with model calculations verified this conclusion.
Document ID
19910057843
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Durden, Stephen L.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Klein, Jeffrey D.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Zebker, Howard A.
(JPL Pasadena, CA, United States)
Date Acquired
August 15, 2013
Publication Date
May 1, 1991
Publication Information
Publication: IEEE Transactions on Geoscience and Remote Sensing
Volume: 29
ISSN: 0196-2892
Subject Category
Earth Resources And Remote Sensing
Accession Number
91A42466
Distribution Limits
Public
Copyright
Other

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