Passive Ranging with the SNAP Model: A Performance Study,

Abstract

A passive ranging technique which used SNAP, the SACLANT Centre's normal-mode model, is studied. An examination is made of the sensitivity of the technique to errors in the assumed sound velocity profile and tilting of a 16 lambda vertical receiving array. Also, the effect of both white and coloured noise in investigated. Results indicate that for the scenario considered (summer profile in the Mediterranean with a water depth of 130 m and source ranges of 10 and 25 km), the method can be quite robust to sound velocity profile errors on the order of several m/s and array tilts on the order of 1.5 deg. Solutions were obtained with input signal-to-noise ratios as low as -13dB. Keywords: Array tilt, Bottom properties, Coloured noise, Depth, Gaussian noise, Inverse problem, Maximum likelihood, Passive ranging, Propagation, Sensitivity, Signal-to-noise ratio, SNAP(SACLANTCEN Normal mode Acoustic Propagation), Sound velocity profile, White noise.

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Document Details

Document Type
Technical Report
Publication Date
Jul 01, 1987
Accession Number
ADA183486

Entities

People

  • E. J. Sullivan
  • K. Rameau

Organizations

  • SACLANT ASW Research Centre

Tags

Communities of Interest

  • Air Platforms
  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Accuracy
  • Acoustic Channels
  • Acoustic Fields
  • Active Sonar
  • Algorithms
  • Data Sets
  • Defense Planning
  • Errors
  • Frequency
  • Gaussian Noise
  • Governments
  • Inverse Problems
  • Measurement
  • Molecular Orbital Theory
  • Nato
  • Noise
  • White Noise

Fields of Study

  • Physics

Readers

  • Acoustics.
  • Adaptive Control and Estimation with Uncertainty in Dynamic Systems.
  • Atmospheric Science / Meteorology, specifically Wind Wave Turbulence.