Accession Number:

AD1031811

Title:

Structural Acoustic UXO Detection and Identification in Marine Environments

Descriptive Note:

Technical Report

Corporate Author:

Naval Research Laboratory Washington United States

Personal Author(s):

• Houston,B. H.
• Saniga,M.
• Simpson,H.
• Waters,Z. J.
• Amon,D.
• Williams,E.
• Yoder,T.
• Bucaro,Joe A.
• Sarkissian,A.

Report Date:

2016-05-01

Pagination or Media Count:

112.0

Abstract:

This work completes the post measurement analysis of the data collected in June 2013 in the Gulf using the BOSS-40. Inclusion of AUV position data has improved image quality and the ability to correctly register buried target depths. Along-range resolution resolved the UXO long axes, and cross-range resolution was within a factor of two of the UXO diameters. In a study that included all targets, results demonstrate that acoustic color can separate the detections from the UXOnon-UXO groups. BOSS source calibration studies demonstrated that the source of AUV system does not radiate spherically causing a significant impact on false target classification performance. Leave one out studies indicated that training experimentally can produce classification algorithms that have a near I probability of classification for UXO targets of the type used in training and a false positive percentage of about 33 against false targets unlike the UXO from a structural acoustics point of view. While the false alarm rate is higher against targets similar to the UXO, this performance would improve significantly with the use of a more uniform source.

Descriptors:

• acoustic waves
• autonomous underwater vehicles
• elastic waves
• pattern recognition
• uxo detection
• acoustic detectors
• acoustic images
• acoustic propagation
• algorithms
• digital data
• false targets
• image processing
• munitions
• sonar

Subject Categories:

• Ammunition and Explosives

Distribution Statement:

APPROVED FOR PUBLIC RELEASE