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Effect of curvature on the backscattering from leavesUsing a model previously developed for the backscattering cross section of a planar leaf at X-band frequencies and above, the effect of leaf curvature is examined. For normal incidence on a rectangular section of a leaf curved in one and two dimensions, an integral expression for the backscattered field is evaluated numerically and by a stationary phase approximation, leading to a simple analytical expression for the cross section reduction produced by the curvature. Numerical results based on the two methods are virtually identical, and in excellent agreement with measured data for rectangular sections of coleus leaves applied to the surfaces of styrofoam cylinders and spheres of different radii.
Document ID
19890001925
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Authors
Sarabandi, K. (Michigan Univ. Ann Arbor, MI, United States)
Senior, T. B. A. (Michigan Univ. Ann Arbor, MI, United States)
Ulaby, F. T. (Michigan Univ. Ann Arbor, MI, United States)
Date Acquired
September 5, 2013
Publication Date
January 1, 1988
Subject Category
Earth Resources And Remote Sensing
Report/Patent Number
NAS 1.26:183326
NASA-CR-183326
Accession Number
89N11296
Funding Number(s)
CONTRACT_GRANT: NAG5-480
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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