TOMOGRAPHIC PROCESSING OF SPOTLIGHT-MODE SYNTHETIC APERTURE RADAR SIGNALS WITH COMPENSATION FOR WAVEFRONT CURVATURE.

J. L. Bauck, William Kenneth Jenkins

    Research output: Contribution to journalConference article

    10 Citations (Scopus)

    Abstract

    An algorithm is introduced which corrects for problems which arise in spotlight-mode synthetic aperture radar (SAR) when a significant amount of wavefront curvature is present. Wavefront curvature can be problematic when it is desired to reconstruct high-resolution images of ground patches which subtend a large angle at the radar. The proposed, non-Fourier, algorithm uses mappings to modify the convolution-backprojection method of computed tomography, providing reconstructions from circular-arc projections that are of the same high quality as those made from standard straight-line projections using the unmodified algorithm. In addition, other problems in high-resolution SAR imaging are identified which have solutions involving tomographic concepts, including situations which give rise to fan-beam-like projections. The new algorithm can be modified to deal with these problems as well.

    Original languageEnglish (US)
    Pages (from-to)1192-1195
    Number of pages4
    JournalICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings
    StatePublished - Jan 1 1988

    Fingerprint

    Wavefronts
    Synthetic aperture radar
    Processing
    Radar imaging
    Image resolution
    Convolution
    Fans
    Tomography
    Radar
    Compensation and Redress

    All Science Journal Classification (ASJC) codes

    • Software
    • Signal Processing
    • Electrical and Electronic Engineering

    Cite this

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    abstract = "An algorithm is introduced which corrects for problems which arise in spotlight-mode synthetic aperture radar (SAR) when a significant amount of wavefront curvature is present. Wavefront curvature can be problematic when it is desired to reconstruct high-resolution images of ground patches which subtend a large angle at the radar. The proposed, non-Fourier, algorithm uses mappings to modify the convolution-backprojection method of computed tomography, providing reconstructions from circular-arc projections that are of the same high quality as those made from standard straight-line projections using the unmodified algorithm. In addition, other problems in high-resolution SAR imaging are identified which have solutions involving tomographic concepts, including situations which give rise to fan-beam-like projections. The new algorithm can be modified to deal with these problems as well.",
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