Calibration of Quantitative Echo Sounders by Using Echo from Water Tank Surface.

• Aoyama Chiharu

  Tokyo University of Fisheries

• Hamada Etuyuki

  Tokyo University of Fisheries

• Furusawa Masahiko

  Tokyo University of Fisheries

• Saito Kiyotaka

  Tokyo University of Fisheries

Bibliographic Information

Other Title

• 水槽の水面反射を利用した計量魚群探知機の較正
• スイソウ ノ スイメン ハンシャ オ リヨウシタ ケイリョウ ギョグン タンチ

Abstract

In order to get reliable results from surveys by quantitative echo sounders, an accurate calibration of the sounder is necessary especially for the transmitting and receiving system. Therefore, we investigated a new method of simple and accurate calibration by utilizing the echoes from the water surface of an experimental water tank. We show that the method can easily calibrate the equivalent beam width of surface scattering by application of the property that the backscattering strength of the surface of water is 0dB. In case of a sharp beam, we show that the equivalent beam widths for surface scattering and volume scattering are nearly the same. Moreover, it is possible to perform an overall calibration of the transmitting and receiving system, including the equivalent beam width and the transmitting and receiving sensitivities, thus producing a more reliable result than the method in which each factor is measured separately.

Journal

• NIPPON SUISAN GAKKAISHI

  NIPPON SUISAN GAKKAISHI 63 (4), 570-577, 1997

  The Japanese Society of Fisheries Science

Keywords

• 計量魚群探知機
• 較正
• 水面反射
• 表面散乱
• 体積散乱
• 等価ビーム幅

Details

• CRID: 1390282681389390080
• NII Article ID: 10004851502
• NII Book ID: AN00193422
• DOI: 10.2331/suisan.63.570
• ISSN: 1349998X
• ISSN: 00215392
• NDL BIB ID: 4258513
• Web Site: https://agriknowledge.affrc.go.jp/RN/2010570428
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I4258513
• Text Lang: ja
• Data Source:
  • JaLC
  • IRDB
  • NDL
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed