Maritime traffic density has increased rapidly and there is a greater danger of ships colliding against one another, as ships become larger and faster. In such a situation, radars have been widely used as an effective watching equipment. However, their target detectability becomes worse due to a stronger sea return. This gives considerable trouble to navigation officers. Although many papers on sea clutter have been reported, there are few on detailed statistical approaches to it, or experimental discussions on the reliability of suppression systems. In this paper we evaluated the histograms of the decorrelation time, and the total power-to-ac power ratio of the sea clutter. Based on these data, we discussed, and experimented on the probability of the signal-to-clutter ratio improvement of the automatic sea clutter suppression system. The results showed that the system composed of a logarithmic receiver, CFAR, and antilog circuits is the most effective and practical one.

  • Supplemental Notes:
    • Published in 30th Anniversary Commemorative Research Study Compilation.
  • Corporate Authors:

    Japan Institute of Navigation

    Tokyo University of Mercantile Marine, 2-1-6 Etchujima, Koto-ku
    Tokyo,   Japan  135-8533
  • Authors:
    • Shoji, K
    • SHIMIZU, T
  • Publication Date: 1978-11

Media Info

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Filing Info

  • Accession Number: 00193556
  • Record Type: Publication
  • Source Agency: Japan Institute of Navigation
  • Files: TRIS
  • Created Date: Apr 25 1979 12:00AM