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Analysis of high-resolution land clutter

Analysis of high-resolution land clutter

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  • Author(s): G. Davidson 1 ; H.D. Griffiths 2 ; S. Ablett 3
    • View affiliations
    • Affiliations: 1: QinetiQ, Fareham, Hants, UK
      2: Department of Electronic and Electrical Engineering, University College London, London, UK
      3: Department of Electronic and Electrical Engineering, Dstl Malvern Technology Centre, Malvern, Worcestershire, UK
  • Source: Volume 151, Issue 1, February 2004, p. 86 – 91
    DOI:  10.1049/ip-vis:20040303 , Print ISSN 1350-245X, Online ISSN 1359-7108
IEE
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Results are presented of an analysis of land clutter from the fixed site high-resolution BYSON radar at Malvern. Digital terrain elevation data are used to determine the imaged ground regions and the normalised-log estimator U is measured to investigate the stability of the long-tailed clutter distribution. Operational target detectors must maintain a constant false alarm rate over the entire scene, but small areas of non-Gaussian backscatter cause the majority of false alarms. To overcome this, a variable CFAR detector is tested and compared to standard CA and CAGO processors. The performance of the empirically determined variable CFAR is superior, but results suggest that there is no simple statistical model for land clutter of this kind as the false alarms within a particular scene are strongly correlated with the environment.

Inspec keywords: radar resolution; backscatter; alarm systems; radar detection; terrain mapping; radar clutter

Other keywords: Malvern; normalised-log estimator measurement; variable CFAR detector performance; imaged ground region determination; CAGO processor; high-resolution land clutter analysis; fixed site high-resolution BYSON radar; operational target detector; digital terrain elevation data; nonGaussian backscatter; constant false alarm rate; standard cell averaging; statistical model; long-tailed clutter distribution stability

Subjects: Signal detection; Radar theory; Other topics in Earth sciences; Instrumentation and techniques for geophysical, hydrospheric and lower atmosphere research; Cartography; Geophysical techniques and equipment; Radar equipment, systems and applications

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