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            <title xml:lang="en">Vector Sensor Arrays in Underwater Acoustic                                    Applications</title>
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                <title xml:lang="en">Vector Sensor Arrays in Underwater Acoustic                                    Applications</title>
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                    <forename type="first">Sérgio M.</forename>
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                <editor>Luis M. Camarinha-Matos; Pedro Pereira; Luis                                    Ribeiro</editor>
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                <term xml:lang="en">Bottom properties estimation</term>
                <term xml:lang="en">Direction of arrival estimation</term>
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              <p>Traditionally, ocean acoustic signals have been                            acquired using hydrophones, which measure the pressure field and are                            typically omnidirectional. A vector sensor measures both the acoustic                            pressure and the three components of particle velocity. Assembled into                            an array, a vector sensor array (VSA) improves spatial filtering                            capabilities when compared with arrays of same length and same number of                            hydrophones. The objective of this work is to show the advantage of the                            use of vector sensors in underwater acoustic applications such as                            direction of arrival (DOA) estimation and geoacoustic inversion. Beyond                            the improvements in DOA estimation, it will be shown the advantages of                            using the VSA in bottom parameters estimation. Additionally, is tested                            the possibility of using high frequency signals (say 8-14 kHz band),                            acquired during the MakaiEx 2005, to allow a small aperture array,                            reducing the cost of actual sub-bottom profilers and providing a compact                            and easy-to-deploy system.</p>
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