Some Effects of Large Scale Oceanography on Acoustic Propagation

Abstract

A propagation experiment was conducted along a great circle track in the North American Basin, beginning at a point 400 km north of Antigua, W.I. and ending at the Grand Banks of Newfoundland. Shallow explosive sources were detonated at half hour intervals and shallow-13.89 and 111.1 Hz cw sources were operated continuously. The acoustic fields were detected by a deep sound channel hydrophone located near Antigua. The shot signatures were aligned in time and range forming a pattern which was dependent on and could be interpreted in terms of large-scale oceanography, Major features of the transmission loss curves for the two continuous wave sources are similarly interpretable in terms of averaged oceanographic parameters.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1975
Accession Number
AD1114975

Entities

People

  • A. N. Guthrie
  • J. D. Shaffer
  • R. M. Fitzgerald

Organizations

  • SACLANT ASW Research Centre

Tags

Communities of Interest

  • Counter IED
  • Ground and Sea Platforms
  • Space

DTIC Thesaurus Topics

  • Acoustic Fields
  • Acoustic Propagation
  • Acoustic Signals
  • Atlantic Ocean
  • Continuous Waves
  • Convergence
  • Convergence Zones (Sonar)
  • Deep Oceans
  • Doppler Effect
  • Explosive Charges
  • Frequency
  • Grazing Angles
  • Losses
  • Military Research
  • Oceanography
  • Oceans
  • Pressure Signatures
  • Sound Pressure
  • Transmission Loss
  • Travel Time
  • Water

Readers

  • Climatology
  • Electromagnetic Wave Scattering and Antenna Radiation Engineering
  • Oceanography.