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Modeling multi-frequency diurnal backscatter from a walnut orchardThe Michigan Microwave Canopy Scattering Model (MIMICS) is used to model scatterometer data that were obtained during the August 1987 EOS (Earth Observing System) synergism study. During this experiment, truck-based scatterometers were used to measure radar backscatter from a walnut orchard in Fresno County, California. Multipolarized L- and X-band data were recorded for orchard plots for which dielectric and evapotranspiration characteristics were monitored. MIMICS is used to model a multiangle data set in which a single orchard plot was observed at varying impedance angles and a series of diurnal measurements in which backscatter from this same plot was measured continuously over several 24-h periods. MIMICS accounts for variations in canopy backscatter driven by changes in canopy state that occur diurnally as well as on longer time scales. L-band backscatter is dependent not only on properties of the vegetation but also on properties of the underlying soil surface. The behavior of the X-band backscatter is dominated by properties of the tree crowns.
Document ID
19920033720
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Mcdonald, Kyle C.
(JPL Pasadena, CA, United States)
Dobson, Myron C.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Ulaby, Fawwaz T.
(Michigan, University Ann Arbor, United States)
Date Acquired
August 15, 2013
Publication Date
November 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
92A16344
Distribution Limits
Public
Copyright
Other

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