Characterization and Simulation of False Alarms Caused by Rock Outcrops

Abstract

Environmentally caused false alarms (FA) and false targets (FT) present some of the most difficult challenges for modern torpedo systems in systems in shallow water. In many cases, the mechanism for FA/FT is clear: scattering from exposed rock on the seafloor, e.g., rock outcrops and ridges. The long-term goals of this research program aim primarily to increase our understanding of and simulation capability for weapons-frequency acoustic scattering from rock outcrops. This knowledge will be used to develop methods for simulating FA/FT in areas of rock outcrops, for predicting where high FA/FT areas might occur and for predicting the influence of parameters such as slope or aspect on FA/FT levels. This effort will also allow the performance of sonar systems to be predicted for rocky environments, which will allow the negative impact of non-Rayleigh clutter on detection and classification to be minimized or robust signal processing methods to be developed or tested. Knowledge gained might also lead to methods for environmental assessment techniques for the characterization of rocky areas for example at test sites.

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Document Details

Document Type
Technical Report
Publication Date
Jun 17, 2013
Accession Number
ADA583323

Entities

People

  • Anthony P. Lyons

Organizations

  • Pennsylvania State University

Tags

Communities of Interest

  • Weapons Technologies

DTIC Thesaurus Topics

  • Acoustic Scattering
  • Autonomous Underwater Vehicles
  • Detection
  • Environmental Assessment
  • False Alarms
  • False Targets
  • Frequency
  • Grazing Angles
  • High Resolution
  • Measurement
  • Pressure Distribution
  • Scattering
  • Seabed
  • Shallow Water
  • Signal Processing
  • Simulations
  • Warning Systems

Readers

  • Acoustical Oceanography.
  • Materials Science.
  • Sensor Fusion and Tracking Systems.

Technology Areas

  • Autonomy