Acoustic Scattering Kernels from Arctic Sea Ice.

Abstract

A new algorithm for computing scattering kernels from Artic ice keels is described. The basic equations are adapted from Burke and Twersky (1966) but the algorithm does not involve approximations in the limits of low or high frequencies, and is therefore more accurate. Calculations over a range of frequencies and grazing angles are presented. An important result is obtained. At high frequencies (greater than 200 hz) a significant component of the incoherent scattered energy is directed into shallow propagation angles (less than 15 degrees). This component must be accounted for in estimates of scattering loss.

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Document Details

Document Type
Technical Report
Publication Date
Oct 01, 1986
Accession Number
ADA174235

Entities

People

  • David Rubenstein

Organizations

  • Leidos

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Acoustic Propagation
  • Acoustic Scattering
  • Algorithms
  • Bessel Functions
  • Cartesian Coordinates
  • Coordinate Systems
  • Differential Equations
  • Equations
  • Frequency
  • Grazing Angles
  • Incoherent Scattering
  • Plane Waves
  • Power Series
  • Reflection
  • Scattering
  • Scattering Cross Sections
  • Sea Ice

Fields of Study

  • Physics

Readers

  • Acoustical Oceanography.
  • Polar and Arctic Studies
  • Wave Propagation and Nonlinear Chaotic Dynamics.