Broadband, Range-Dependent Normal Mode Modeling

Abstract

Our long-term goals are to develop practical approaches to modeling broadband acoustic propagation in range-dependent environments using normal mode theory, to improve the capabilities and efficiency of a specific acousto-elastic normal mode model (ORCA), and to provide support to others in the underwater acoustic community who use our modeling products. Work during FY98 focused on three areas: (1) developing, analyzing, and implementing a method for eliminating the branch line integral from the normal mode solution, (2) investigating the accuracy and characteristics of various adiabatic- and coupled-mode approaches for range-dependent benchmark problems, and (3) completing the documentation of work related to the ONR-sponsored Geoacoustic Inversion Workshop from the previous fiscal year.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1998
Accession Number
ADA551592

Entities

People

  • David P. Knobles
  • Evan K. Westwood
  • Robert A. Koch

Organizations

  • University of Texas at Austin

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Accuracy
  • Acoustic Propagation
  • Active Sonar
  • Algorithms
  • Broadband
  • Computer Programs
  • Couplings
  • Energy
  • Errors
  • Frequency
  • Genetic Algorithms
  • Group Velocity
  • Information Operations
  • Integrals
  • Reflection
  • Seabed
  • Transmission Loss

Fields of Study

  • Physics

Readers

  • Acoustical Oceanography.
  • Defense Acquisition Program Management
  • Wave Propagation and Nonlinear Chaotic Dynamics.