Quarterly Progress Report Number 2, 1 July-30 September 1971.

Abstract

In Section I a status report is given on the possible verification of ARL's forward scattering theory with data from the sea surface. The literature on forward and specular scattering has been thoroughly examined. No appropriate forward scatter data were found from the sea surface. Due to the lack of available sea surface data, a forward scatter experiment is presently being proposed at ARL's Lake Travis Test Station. A brief discussion and proposed experimental setup are described herein, along with some theoretical forward scatter predictions. In Section II the acoustic surface duct propagation problem for an irregular boundary is solved in terms of a contour integral. The roughness is incorporated into the boundary value problem by means of an effective reflection coefficient. Application is made to the surface duct transmission problem for a velocity-depth variation given by the Epstein profile. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Nov 08, 1971
Accession Number
ADA035897

Entities

Organizations

  • University of Texas at Austin

Tags

Communities of Interest

  • Air Platforms
  • Ground and Sea Platforms
  • Materials and Manufacturing Processes
  • Weapons Technologies

DTIC Thesaurus Topics

  • Acoustic Propagation
  • Acoustic Scattering
  • Acoustic Signals
  • Acoustic Waves
  • Acoustics
  • Backscattering
  • Boundary Value Problems
  • Contour Integrals
  • Forward Scattering
  • Frequency
  • Grazing Angles
  • Measurement
  • Reflection
  • Reverberation
  • Scattering
  • Statistics
  • Waves

Readers

  • Electromagnetic Wave Scattering and Antenna Radiation Engineering
  • Marine Hydrodynamics
  • Wave Propagation and Nonlinear Chaotic Dynamics.