UNDERWATER SCATTERING AND PROPAGATION OF ACOUSTIC WAVES.

Abstract

A computer program to identify half-buried cylinders, or cylinders lying on ocean bottom was successfully tested. Ray path in an exponential and moving ocean model was calculated. A grid of twenty-five sensors to measure spatial (gamma, phi) wave heights was completed and tested. Ocean model surface used to show that surface reverberation consists of: (a) Most predominant component originating from the water-air interface; (b) The doppler in surface reverberation is not generated by the moving volume of water underneath the water-air interface, but by the surface (water-air interface) motion. Most of the microfilm data was read, corrected, card-punched, and computer analyzed. Statistical surface return from randomly varying size long hemicylinders was theoretically and experimentally obtained. (Author)

Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1968
Accession Number
AD0825146

Entities

People

  • H. S. Hayre

Tags

Communities of Interest

  • Sensors

DTIC Thesaurus Topics

  • Acoustic Scattering
  • Acoustic Waves
  • Computer Programs
  • Computers
  • Microfilm
  • Photographic Materials
  • Photography
  • Reverberation
  • Scattering
  • Seabed
  • Waves

Readers

  • Atmospheric Science / Meteorology, specifically Wind Wave Turbulence.
  • Fluid Dynamics.
  • Oceanography.