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Title: Reflection and identification studies applied to terrain imaging radar
Authors: University of Michigan. Department of Geological Sciences.
Jackson, Philip L.
Keywords: Radar backscatter
Synthetic aperture radar
Fourier transform
Terrain identification
Slope effects
Issue Date: Jun-1983
Publisher: U.S. Army Engineer Topographic Laboratories.
Engineer Research and Development Center (U.S.)
Series/Report no.: ETL ; 0331.
Description: Contract report
Abstract: Two separate studies were undertaken. The first was concerned with the slope effects on backscatter of synthetic aperture radar (SAR). The imagery of a cinder cone (SP Mountain in northern Arizona), which has near-homogeneous surface roughness, was studied. The flight parameters of the imaging radar vehicle were found from the radar image and topographic data obtained from a 1:62500 map. The slant range radar image was converted to ground range with relief displacement rectified. The three-dimensional angle of incidence for each element was computed and plotted against the backscatter value. The average backscatter curve was a typical S-shaped pattern. With the techniques developed for the above, pseudo-SAR slant and ground range images were generated from the topographic data. The second study was concerned with investigating discrimination techniques for uncultivated, agricultural, suburban and urban areas. The work was limited to the use of the Fourier transform. Optical transforms and Fast Fourier transforms were obtained of optically processed SAR imagery. This preliminary work showed distinct differences between uncultivated and cultural areas, but not between cultural areas.
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