3rd French conference on acoustics
J. Phys. IV France 04 (1994) C5-1039-C5-1042
Analyse spatio-temporelle de trajets propagés en ASM sur de moyennes distancesB. FAURE1, D. MAUUARY1 and T. TERRE2
1 CEPHAG, INPG/ENSIEG, URA 346 du CNRS, BP. 46, 38402 Saint Martin d'Hères cedex, France
2 LPO, IFREMER, BP. 70, 29280 Plouzane cedex, France
We propose, from experimental data, to identify the ocean acoustic multipaths, between acoustic sources and receivers separated about 100 km. After the description of experiment, we show that the active beamforming, using the knowledge of emitted signal, leads to satisfying spatial identification when the multipaths are temporarily separed, in spite of an antenna with only two phase centers. A fast spatio-temporal localization algorithm is used and useful results for acoustic tomography are obteined.
© EDP Sciences 1994