Accession Number:

ADA625833

Title:

Chirp Sonar Support for Mine Burial Program

Descriptive Note:

Annual rept.

Corporate Author:

FLORIDA ATLANTIC UNIV BOCA RATON DEPT OF OCEAN ENGINEERING

Personal Author(s):

Report Date:

2001-09-30

Pagination or Media Count:

4.0

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. Neural network and 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, attenuation and volume scattering coefficients. The procedures for remotely estimating sediment properties are being verified using core data and in situ 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 remote acoustic sediment property prediction procedures.

Subject Categories:

  • Hydrology, Limnology and Potamology
  • Acoustic Detection and Detectors
  • Underwater Ordnance

Distribution Statement:

APPROVED FOR PUBLIC RELEASE