Accession Number:

ADA621853

Title:

UXO Detector for Underwater Surveys Using Low-Frequency Sonar

Descriptive Note:

Final rept. 1 Apr 2014-1 Jun 2015

Corporate Author:

NETHERLANDS ORGANISATION FOR APPLIED RESEARCH TNO THE HAGUE

Personal Author(s):

• Vossen, Robert van
• Hunter, Alan J.
• Duijster, A. J.
• Beckers, A. L.

Report Date:

2015-06-01

Pagination or Media Count:

47.0

Abstract:

Locating and surveying underwater dumping sites of unexploded ordnance UXO is challenging, particularly when they are buried beneath the seafloor sediment. Low-frequency LF sonars have a demonstrated capability for detecting buried objects. However, high clutter densities observed in relevant operational environments will limit their use unless a capacity is developed to distinguish between clutter e.g., natural objects, debris, and seafloor topography and UXO. In this project, a two-stage detection approach has been developed for UXO detection. This approach has been applied to MUD-2011 data and the evaluation demonstrated that it is capable of reducing the number of contacts corresponding to natural clutter with 60 compared to a threshold detector.

Descriptors:

• *SEA CLUTTER
• *SYNTHETIC APERTURE SONAR
• *UNDERWATER MINES
• *UNDERWATER OBJECT LOCATORS
• ACOUSTIC SIGNATURES
• BURIED OBJECTS
• DETECTION
• FEATURE EXTRACTION
• LOW FREQUENCY
• OCEAN BOTTOM
• UNEXPLODED AMMUNITION

Subject Categories:

• Acoustic Detection and Detectors
• Underwater Ordnance

Distribution Statement:

APPROVED FOR PUBLIC RELEASE