NDLI: Fitting a two-component scattering model to polarimetric sar data

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Fitting a two-component scattering model to polarimetric sar data

Content Provider	NASA Technical Reports Server (NTRS)
Author	Freeman, A.
Copyright Year	1998
Description	Classification, decomposition and modeling of polarimetric SAR data has received a great deal of attention in the recent literature. The objective behind these efforts is to better understand the scattering mechanisms which give rise to the polarimetric signatures seen in SAR image data. In this Paper an approach is described, which involves the fit of a combination of two simple scattering mechanisms to polarimetric SAR observations. The mechanisms am canopy scatter from a cloud of randomly oriented oblate spheroids, and a ground scatter term, which can represent double-bounce scatter from a pair of orthogonal surfaces with different dielectric constants or Bragg scatter from a moderately rough surface, seen through a layer of vertically oriented scatterers. An advantage of this model fit approach is that the scattering contributions from the two basic scattering mechanisms can be estimated for clusters of pixels in polarimetric SAR images. The solution involves the estimation of four parameters from four separate equations. The model fit can be applied to polarimetric AIRSAR data at C-, L- and P-Band.
File Size	172000
Page Count	3
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_20000054881
Archival Resource Key	ark:/13960/t74v1jd0z
Language	English
Publisher Date	1998-01-01
Access Restriction	Open
Subject Keyword	Communications And Radar Ultrahigh Frequencies Radar Data Fitting Scattering C Band Oblate Spheroids Polarimetry Bragg Angle Radar Imagery Synthetic Aperture Radar Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Technical Report

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