Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.1/5233
Título: Towed array beamforming during ship's maneuvering
Autor: Felisberto, P.
Jesus, S. M.
Palavras-chave: Hydrophone urrays
Array shape distortion
Data: 2002
Editora: IET
Citação: 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.
Resumo: 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
Peer review: yes
URI: http://hdl.handle.net/10400.1/5233
DOI: http://dx.doi.org/ 10.1049/ip-rsn:19960492
Aparece nas colecções:FCT2-Artigos (em revistas ou actas indexadas)

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