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  • 1
    Online Resource
    Online Resource
    Acoustical Society of America (ASA) ; 2005
    In:  The Journal of the Acoustical Society of America Vol. 117, No. 4_Supplement ( 2005-04-01), p. 2549-2549
    In: The Journal of the Acoustical Society of America, Acoustical Society of America (ASA), Vol. 117, No. 4_Supplement ( 2005-04-01), p. 2549-2549
    Abstract: The SPICEX-LOAPEX-BASSEX expermiments were executed in the Northeast Pacific to examine several long range, low frequency propagation phenomena. Low frequency sources centered at 68 and 75 Hz with nominal bandwidth of 30 Hz and a source at 250 Hz with 100 Hz bandwidth were deployed transmitting orthogonal M seqeunces and FM chirps. A 64 element towed array cut for 250 Hz from Penn State Univ. was the primary multichannel receiving system. This presentation concerns the BASSEX study of low frequency scattering around the Kermit-Roosevelt Seamount complex which shoals to 900 m near 39 N and 145 W. We examine (i) the forward scattering shadow, (ii) any patterns of horizontal refraction as a function of source and receiver range from the seamounts, (iii) any backscattering from the seamounts, and (iv) the modal content of the signals by travel time methods. In addition, directional spectra of ambient noise were measured.
    Type of Medium: Online Resource
    ISSN: 0001-4966 , 1520-8524
    RVK:
    Language: English
    Publisher: Acoustical Society of America (ASA)
    Publication Date: 2005
    detail.hit.zdb_id: 1461063-2
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  • 2
    Online Resource
    Online Resource
    Acoustical Society of America (ASA) ; 2010
    In:  The Journal of the Acoustical Society of America Vol. 128, No. 4_Supplement ( 2010-10-01), p. 2385-2385
    In: The Journal of the Acoustical Society of America, Acoustical Society of America (ASA), Vol. 128, No. 4_Supplement ( 2010-10-01), p. 2385-2385
    Abstract: One of the objectives of the Philippine Sea 09 (PhilSea09) was to examine the multipath structure of RAP propagation at the seafloor. For a source near the surface, a receiver at the seafloor, and ranges approaching one-half a CZ, one expects a direct path, seafloor reflected and refracted paths plus water column multiples. These were measured using the bottom elements of the SIO deep vertical line array. Similarly, for both a source and a receiver at the surface and at CZ ranges, these same paths propagate back to the surface. These were also measured with the PSU FORA (five octave research array). The experiment was part of an NPAL Group effort. [Work supported by ONR Ocean Acoustics.]
    Type of Medium: Online Resource
    ISSN: 0001-4966 , 1520-8524
    RVK:
    Language: English
    Publisher: Acoustical Society of America (ASA)
    Publication Date: 2010
    detail.hit.zdb_id: 1461063-2
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
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