| Autor: |
Demoulin, X., Pelissero, L., Stephan, Y., Jesus, S. M., Porter, M. B., Coelho, E. |
| Jazyk: |
angličtina |
| Rok vydání: |
2000 |
| Předmět: |
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| Popis: |
A simple and fast approach to retrieve equivalent geoacoustic parameters is presented in this paper. The method is based upon the processing of 300-800 Hz broadband signals on a single hydrophone.Two stable characteristics of the impulse response of the shallow water waveguide are estimated: the time dispersion and the bottom reflection amplitudes. This two features are analytically linked to the compressional speed and to the attenuation coefficient of the medium. The inversion of the two latter geoacoustic parameters is straightforward since it relies on an analytical expression. The method is tested on INTIMATE96 data. The results show an excellent agreement between the reflection of the true medium and the reflection coefficient of the equivalent medium. The partners of the INTIMATE project wish to thank the staff of NRP ANDROMEDA, the staff of BO D’ENTRECASTEAUX and people of Mission Océanographique de l’Atlantique (aboard D’ENTRECASTEAUX). We also wish to thank the SACLANT Undersea Research Center for lending the Portable Array System and Roberto Chiarabini (SACLANTCEN) for his participation in the array preparation, deployment and use. Thanks to T. Folegot and G. Bonnaillie (CMO) for their active contribution in this work. The study was jointly sponsored by SHOM (exploratory program 95901), the Portuguese Ministery of Research (PRAXIS XXI) and ONR (contract N00014-95-1-0558). |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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