Detection and Classification of Buried UXO and Determination of Seafloor Parameters in Littoral Environments using Resonance Scattering Sonar
Abstract
Current sonar technology applied to littoral munitions management is concerned with the detection and characterization of UXO in the water column and located proud on the seafloor. Most sonar applications work in the high-frequency regime where specular scattering off the UXO surfaces dominates the reflected signal. These applications are aimed at locating and characterizing the object by generating a visual image of the UXO and its shadow on the seafloor. Current efforts are underway to extend these sonar applications to buried objects investigating the effectiveness of seafloor penetration by sonar waves (Lim et al., 2009, Kargl et al., 2009). However, high frequencies are generally not well suited to penetrate the seafloor and image buried objects. Biologic activity in the upper parts of the sediments may cause anaerobic conditions producing gas pockets that attenuate the acoustic signal and constrain the maximum penetration of the waves. If free gas is present in the sediments, it may produce anelastic attenuation particularly for the high frequency components of the sonar signal.
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 02, 2010
- Accession Number
- ADA520116
Entities
People
- Lane Johnson
- Roland Gritto
- Valeri Korneev
Organizations
- Array Information Technology (United States)