@article{ref1,
title="Small boat localization using adaptive three-dimensional beamforming on a tetrahedral and vertical line array",
journal="Journal of the Acoustical Society of America",
year="2013",
author="Gebbie, John and Siderius, Martin and Nielsen, Peter and Miller, James H. and Crocker, Steven and Giard, Jennifer",
volume="133",
number="5",
pages="3527-3527",
abstract="Passive acoustic detection and localization of small surface craft has a number of practical applications, such as monitoring and protecting sensitive marine habitats. Moored passive equipment can be cumbersome to deploy and communicate with, so AUV-mounted devices are being investigated as an alternative. The GLASS'12 experiment was designed to assess the feasibility of using a hybrid autonomous underwater vehicle outfitted with a compact volumetric nose array as a data collection platform. The array consisted of five vertical elements and 4 in a tetrahedral arrangement, and the hybrid underwater vehicle had the capability operating in either glider or propeller-driven modes. The rigid design of the array minimized element location mismatch and enabled the use of aggressive adaptive beamforming in 3-D. This facilitated isolation of broadband multipath arrivals originating from the motor of a small rubber boat. Cross-correlation of beams enabled the time-lag between the arrivals to be measured, which, in turn yielded information about the target range. The underlying formulation bears similarity to the passive fathometer [J. Acoust. Soc. Am. 120(3) (2006)], which exploits surface wave noise rather than ship noise. This presentation will focus on the array beamforming and potential applications for localization and environmental sensing.<p /> <p>Language: en</p>",
language="en",
issn="0001-4966",
doi="10.1121/1.4806350",
url="http://dx.doi.org/10.1121/1.4806350"
}