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Vegetation canopy discrimination and biomass assessment using multipolarized airborne SARMultipolarized airborne Synthetic Aperture Radar (SAR) data were acquired over a largely agricultural test site near Macomb, Illinois, in conjunction with the Shuttle Imaging Radar (SIR-B) experiment in October 1984. The NASA/JPL L-band SAR operating at 1.225 GHz made a series of daily overflights with azimuth view angles both parallel and orthogonal to those of SIR-B. The SAR data was digitally recorded in the quadpolarization configuration. An extensive set of ground measurements were obtained throughout the test site and include biophysical and soil measurements of approximately 400 agricultural fields. Preliminary evaluation of some of the airborne SAR imagery indicates a great potential for crop discrimination and assessment of canopy condition. False color composites constructed from the combination of three linear polarizations (HH, VV, and HV) were found to be clearly superior to any single polarization for purposes of crop classification. In addition, an image constructed using the HH return to modulate intensity and the phase difference between HH and VV returns to modulate chroma indicates a clear capability for assessment of canopy height and/or biomass. In particular, corn fields heavily damaged by infestations of corn borer are readily distinguished from noninfested fields.
Document ID
19860001161
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Ulaby, F. T.
(Michigan Univ. United States)
Dobson, M. C.
(Michigan Univ. United States)
Held, D. N.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Date Acquired
August 12, 2013
Publication Date
June 15, 1985
Publication Information
Publication: NASA(JPL Aircraft SAR Workshop Proc.
Subject Category
Earth Resources And Remote Sensing
Accession Number
86N10628
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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