Generation of Synthetic SAS Data for Targets near the Seafloor: Propagation Component

Abstract

The primary objective of the proposed research is continued development of an APL-UW synthetic aperture sonar simulation tool (SAS-ST). This tool can generate sets of realistic signals suitable for SAS and acoustic color template (i.e., target strength as a function of aspect angle and frequency) processing for targets near the seafloor. Updates to the propagation component are tested and validated against experimental data. The proposed research includes a few specific aims for improvements to SAS-ST. First, a fast ray-based model for propagation in a homogenous waveguide, which tracks time-of-flight wave packets from sources to targets and then to receivers, was reduced a fluid-fluid, half-space model and applied to a circular SAS simulation. The ray model use image sources and receivers to account for interaction with the water-sediment interface. Validation of the half-space model was carried out by comparison to Pond Experiment 2010 (PondEx10) data and against finite-element model (FEM) simulations.

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Document Details

Document Type
Technical Report
Publication Date
Sep 30, 2012
Accession Number
ADA574940

Entities

People

  • Steven G. Kargl

Organizations

  • University of Washington

Tags

Communities of Interest

  • Energy and Power Technologies
  • Weapons Technologies

DTIC Thesaurus Topics

  • Aspect Angle
  • Carrier Frequencies
  • Demographic Cohorts
  • Experimental Data
  • Free Field
  • Frequency
  • Integrals
  • Measurement
  • Physics Laboratories
  • Scattering
  • Seabed
  • Sediments
  • Simulations
  • Synthetic Aperture Sonar
  • Target Strength
  • Targets
  • Wave Packets

Readers

  • Acoustical Oceanography.
  • Computational Modeling and Simulation

Technology Areas

  • Space
  • Space - Space Objects