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Authors
Advisor(s)
Abstract(s)
Towed hydrophone arrays are commonly used for determining the spatial characteristics of the underwater acoustic field. The assumption that the hydrophones lie in a straight and horizontal line is often made when beamforming the hydrophone outputs. However, due to tow vessel motion, ocean swells and currents the array adopts a nonlinear shape and the beamformer output is degraded. To estimate the positions of the hydrophones an array was instrumented with a set of positioning sensors: compasses, tiltmeters, accelerometers and pressure gauges. The authors present the array deformations recorded at sea when the tow vessel is turning and along straight-line tracks. The influence of the observed deformations on the performance of the conventional beamformer output is discussed and illustrated with simulated and real acoustic data
Description
Keywords
Hydrophone urrays Array shape distortion
Citation
P. FELISBERTO e S.M. JESUS, ``Towed array beamforming during ship's maneuvering'', in IEEE Proc. Radar, Sonar and Navigation, vol. 143, no. 3, p. 210-215.
