Acoustic Propagation in the Somali Basin.

Abstract

Acoustic propagation in the Somali Basin region of the Indian Ocean was evaluated using the ICAPS program. Direct path range predictions were made for a towed array (100 Hz) at 100 m and a hull mounted sonar (2000 Hz) at 10 m sensing a signal generated by a source at 100 m. Predictions were based on climatological and recent observed data. These predictions were compared in order to ascertain the accuracy of the ICAPS climatological prediction. In general, the ICAPS performed marginally well during the summer monsoon season with an average difference of 9% in predicted ranges at 100 Hz and 19% at 2000 Hz for a FOM of 100 or greater. However, predictions based on the winter season climatology were significantly in error with range predictions being over and under predicted by a factor of two. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1980
Accession Number
ADA100119

Entities

People

  • James Samuel Hanna

Organizations

  • Naval Postgraduate School

Tags

Communities of Interest

  • Sensors

DTIC Thesaurus Topics

  • Accuracy
  • Acoustic Propagation
  • Acoustics
  • Arabian Sea
  • Detection
  • Geographic Regions
  • Geography
  • Indian Ocean
  • Oceanography
  • Oceans
  • Pressure Distribution
  • Red Sea
  • Ridges
  • Topography
  • Towed Arrays
  • United States
  • United States Naval Academy

Readers

  • Acoustics.
  • Atmospheric Science/Meteorology
  • Oceanography.