Remote Seabed Sediment Classification and Sediment Property Estimation Using High Resolution Refection Profiles

Abstract

The long term research objective is to develop a cost effective technique for mapping the top 20 meters of sediment properties using acoustic remote sensing. In previous years, a chirp sonar was developed to provide quantitative, wideband reflection measurements of the seabed with a vertical resolution of 10 cm. Fuzzy logic techniques have been used to automatically detect subsurface layer interfaces and to find the boundaries between sediment layers. Signal processing techniques were developed to estimate vertical profiles of impedance and attenuation. The procedures for remotely estimating sediment properties are being verified using core data and insitu measurements. New signal processing techniques have been developed that allow several sources transmitting simultaneously in different bands to build a wideband FM pulse in the far field. That wideband data is being used to improve the accuracy of the measuring sediment properties including impedance, attenuation and phase dispersion.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Sep 30, 2002
Accession Number
ADA629015

Entities

People

  • Steven G. Schock

Organizations

  • Florida Atlantic University

Tags

Communities of Interest

  • Advanced Electronics

DTIC Thesaurus Topics

  • Accuracy
  • Acoustic Impedance
  • Acoustic Properties
  • Attenuation
  • Chirp Sonar
  • Classification
  • Dispersions
  • Far Field
  • Fuzzy Logic
  • High Resolution
  • Impedance
  • Measurement
  • Physical Properties
  • Reflection
  • Remote Sensing
  • Signal Processing
  • Sonar

Readers

  • Acoustical Oceanography.