A carregar...
Publicação
Towed array beamforming during ship's maneuvering
| Nome: | Descrição: | Tamanho: | Formato: | |
|---|---|---|---|---|
| 656.47 KB | Adobe PDF |
Autores
Orientador(es)
Resumo(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
Descrição
Palavras-chave
Hydrophone urrays Array shape distortion
Contexto Educativo
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.
Editora
IET