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Proceedings Paper

Subaperture imaging in SAR: results and directions
Author(s): Warren E. Smith; Paul W. Barnes; Daniel P. Filiberti; Andrew M. Horne; Darren G. Muff; Richard Geoffrey White
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Paper Abstract

The complex phase history of the synthetic aperture radar (SAR) image can be broken up into a series of overlapping crossrange sub-apertures from which time-dependent information can be extracted from the scatterers that make up the image. The change in the image characteristics from one sub-aperture window to the next can be correlated to generate a stability map of the scene; i.e., areas that change rapidly as the sensor viewpoint changes can be identified. These changes in pixel characteristics over the aperture may be due to many sources: scatterers interfering with each other differently as acquisition geometry is swept out, scatterer sources being created and destroyed as the geometry changes, and aspect- dependent scatterers (e.g. dihedrals) being interrogated differently over the width of the aperture. The stability analysis reported earlier for the peak features has been extended to arbitrary pixels in the SAR image, and the application of this analysis to other features of interest can be made. An example using measured MSTAR data of the stability of a characterized scatterer from the Slicey phantom, imaged in a self-obscuring state, is presented in the context of the stability analysis. Further generalizations of the approach to polarimetric SAR are also presented.

Paper Details

Date Published: 24 August 2000
PDF: 12 pages
Proc. SPIE 4053, Algorithms for Synthetic Aperture Radar Imagery VII, (24 August 2000); doi: 10.1117/12.396327
Show Author Affiliations
Warren E. Smith, Science Applications International Corp. (United States)
Paul W. Barnes, Science Applications International Corp. (United States)
Daniel P. Filiberti, Science Applications International Corp. (United States)
Andrew M. Horne, Defence Evaluation Research Agency Malvern (United Kingdom)
Darren G. Muff, Defence Evaluation Research Agency Malvern (United Kingdom)
Richard Geoffrey White, Defence Evaluation Research Agency Malvern (United Kingdom)


Published in SPIE Proceedings Vol. 4053:
Algorithms for Synthetic Aperture Radar Imagery VII
Edmund G. Zelnio, Editor(s)

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