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Polarization signatures for abandoned agricultural fields in the Manix Basin area of the Mojave DesertPolarimetric signatures from abandoned circular alfalfa fields in the Manix Basin area of the Mojave desert show systematic changes with length of abandonment. The obliteration of circular planting rows by surface processes could account for the disappearance of bright 'spokes', which seems to be reflection patterns from remnants of the planting rows, with increasing length of abandonment. An observed shift in the location of the maximum L-band copolarization return away from VV, as well as an increase in surface roughness, both occurring with increasing age of abandonment, seems to be attributable to the formation of wind ripple on the relatively vegetationless fields. A Late Pleistocene/Holocene sand bar deposit, which can be identified in the radar images, is probably responsible for the failure of three fields to match the age sequence patterns in roughness and peak shift.
Document ID
19920018782
Document Type
Conference Paper
Authors
Ray, Terrill W. (California Inst. of Tech. Pasadena., United States)
Farr, Tom G. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Vanzyl, Jakob J. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Date Acquired
September 6, 2013
Publication Date
August 1, 1991
Publication Information
Publication: Proceedings of the Third Airborne Synthetic Aperture Radar (AIRSAR) Workshop
Subject Category
COMMUNICATIONS AND RADAR
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.