Effect of Ship Motion on Sonar Detection Performance

Abstract

For an unstabilized transducer, the effect of ship motion on sonar echoes istwofold:1. Attenuation caused by the rotational movement of the transducer in the vertical plane. The results show that the different loss figures are periodic in range. The average loss (in dB) increases about linearly with the amplitude (in degrees) of the swinging transducer.2. Distortion caused by the irregular translational movement of the transducer in the direction of the target. In order to arrive at realistic figures for attenuation and distortion, actual ship movements are being measured. Some samples of recorded ship movement data are presented.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1975
Accession Number
AD1114940

Entities

People

  • J G Schothorst

Organizations

  • SACLANT ASW Research Centre

Tags

Communities of Interest

  • Ground and Sea Platforms

DTIC Thesaurus Topics

  • Acoustic Equipment
  • Acoustic Phenomena
  • Acoustic Signals
  • Amplitude
  • Attenuation
  • Carrier Frequencies
  • Detection
  • Detectors
  • Distortion
  • Doppler Effect
  • Frequency
  • Intervals
  • Losses
  • Ship Motion
  • Ships
  • Sinusoidal Functions
  • Sonar Echoes
  • Sonar Pulses
  • Sonar Signals
  • Sonar Transducers
  • Transducers

Readers

  • Acoustical Oceanography.
  • Control Systems Engineering.
  • Naval Architecture and Marine Engineering.