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Using ocean ambient noise for array self-localization and self-synchronization
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DOI：10.1109/JOE.2005.850908.png)
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Estimates of the travel times between the elements of a bottom hydrophone array can be extracted from the time-averaged ambient noise cross-correlation function (NCF). This is confirmed using 11-min-long data blocks of ambient noise recordings that were collected in May 1995 near the southern California coast at an average depth of 21 m in the 150-700 Hz frequency range. Coherent horizontal wavefronts emerging from the time derivative of the NCF are obtained across the array's aperture and are related to the direct arrival time of the time-domain Green's function (TDGF). These coherent wavefronts are used for array element self-localization (AESL) and array element self-synchronization (AESS). The estimated array element locations are used to beamform on a towed source.
Keyword:
ambient noise
array element localization
cross-correlations
inversion
synchronization
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5.3
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2.6K
被引数:
7.4K
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