Navy Interim Surface Ship Model (NISSM) II

Abstract

A computer program, Navy Interim Surface ship Model (NISSM) II, has been developed to predict the performance of active sonar systems. Thereby acoustic ray trajectories, propagation-loss curves, boundary and volume reverberation, signal-to-noise ratios, and the probability of detection are determined using continuous-gradient ray-tracing techniques. Caustic, shadow zone, and surface-duct corrections modify the classical ray theory. The major limitations of the model are that the ocean bottom must be horizontal and the velocity of sound may not vary with range.

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Document Details

Document Type
Technical Report
Publication Date
Nov 14, 1973
Accession Number
AD0916280

Entities

People

  • Henry Weinberg

Organizations

  • Naval Underwater Systems Center

Tags

Communities of Interest

  • C4I
  • Energy and Power Technologies
  • Ground and Sea Platforms

DTIC Thesaurus Topics

  • Absorption Coefficients
  • Acoustic Properties
  • Acoustic Waves
  • Acoustics
  • Active Sonar
  • Ambient Noise
  • Caustics
  • Computer Programs
  • Convergence Zones (Sonar)
  • Detection
  • Detectors
  • Equations
  • False Alarms
  • Measurement
  • Plastic Explosives
  • Scattering
  • Test And Evaluation

Fields of Study

  • Physics

Readers

  • Acoustical Oceanography.
  • Computational Modeling and Simulation