Angular Dependence of High-Frequency (>200 kHz) Seafloor Acoustic Backscatter

Abstract

LONG-TERM GOALS: The long-term objectives of the proposed research are to develop a physics-based model of high-frequency sound scattering from stratified heterogeneous sediments. Such a model is needed to interpret the ever-increasing amount of seafloor acoustic backscatter data collected by, or for the US Navy with high-frequency sonars (>200 kHz) mounted on autonomous underwater vehicles (AUVs) for rapid environmental assessments and reconnaissance missions in denied areas. OBJECTIVES: The scientific goals of this work are to determine empirically the angular dependence of high-frequency seafloor acoustic backscatter over grazing angles spanning 25 deg to 90 deg, for which no reliable model exists (Jackson et al., 2007, Ch. 7-8).

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Document Details

Document Type
Technical Report
Publication Date
Sep 01, 2011
Accession Number
ADA571578

Entities

People

  • Christian De Moustier

Tags

Communities of Interest

  • Autonomy

DTIC Thesaurus Topics

  • Acoustics
  • Acquisition
  • Autonomous Underwater Vehicles
  • Backscattering
  • Chirp Sonar
  • Core Sampling
  • Data Acquisition
  • Detection
  • Environmental Assessment
  • Frequency
  • Grazing Angles
  • Measurement
  • Offshore
  • Scattering
  • Seabed
  • Sonar
  • Underwater Vehicles

Fields of Study

  • Physics

Readers

  • Coastal Oceanography
  • Electromagnetic Wave Scattering and Antenna Radiation Engineering
  • Unmanned Aerial System (UAS) Autonomous Capabilities and Mission Reconnaissance.