The FACT Model. Volume 2

Abstract

The FACT (Fast Asymptotic Coherent Transmission) Model is the new Navy Interim Standard Transmission Model for Ocean environments which may be treated within the context of a single sound-speed profile and a flat bottom. It is a ray-acoustics model designed for the computation of transmission loss as a function of range and frequency at fixed depth. The classical ray treatment has been augmented with higher order asymptotic corrections in the vicinity of caustics, and the phased addition of selected paths experiencing significant, predictable coherence effects. The computer program is fully automated requiring only the specification of the environment and the essential parameters. The second volume describes the program structure and flow with complete samples of input and output and is intended primarily for programmers attempting to implement the model on their computers.

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1974
Accession Number
ADA078539

Entities

People

  • C. L. Baker
  • C. W. Spofford

Organizations

  • Office of Naval Research

Tags

Communities of Interest

  • Autonomy

DTIC Thesaurus Topics

  • Acoustic Propagation
  • Amplitude
  • Analytic Functions
  • Attenuation
  • Bottom Bounce
  • Computer Programs
  • Computers
  • Equations
  • Frequency
  • Geometry
  • Intensity
  • Losses
  • Ocean Environments
  • Oceans
  • Procedures (Computers)
  • Ray Tracing
  • Transmission Loss

Fields of Study

  • Physics

Readers

  • Computer Science.
  • Systems Analysis and Design
  • Wave Propagation and Nonlinear Chaotic Dynamics.