Measurement of sound-speed gradients in deep-ocean sediments usingl_{1}deconvolution techniques

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dc.contributor.author Chapman, N
dc.contributor.author Barrodale, I
dc.contributor.author Zala, C
dc.date.accessioned 2009-07-15T21:55:01Z
dc.date.available 2009-07-15T21:55:01Z
dc.date.copyright 1984 en
dc.date.issued 1984
dc.identifier.citation IEEE journal of oceanic engineering [0364-9059] Chapman yr.1984 vol.9 iss.1 pg.26 -30 en
dc.identifier.issn 0364-9059
dc.identifier.uri http://hdl.handle.net/1828/1454
dc.description ©1984 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE. en
dc.description.abstract A method is described for measuring the sound speed and the sound-speed gradient of surficial sea floor sediment from bottom-reflected signals recorded in marine seismic experiments. The technique makes use of the ocean-bottom impulse responses that are deconvolved from the data by means of a novel curve-fitting algorithm based on thel_{1}norm (least absolute value) criterion. The algorithm constructs the impulse response by extracting spikes one at a time in a manner that causes thel_{1}error to decrease by the maximum amount possible as each spike is chosen. Thel_{1}curve-fitting approach is a completely general strategy for deconvolution, and our algorithm can be used with data obtained from any type of marine seismic source. Since our experiments have been carried out with small explosive charges, we have also developed a method for estimating the bubble-pulse wavelet directly from the recorded bottom-reflected signal. In this paper, thel_{1}algorithm is used to deconvolve impulse responses for data obtained in an experiment in the Alaskan Abyssal Plain. The sediment-sound-speed gradient determined from these results is typical of other values reported for turbidite abyssal plains where the surficial sediments are composed of unconsolidated silty deposits. en
dc.language.iso en en
dc.publisher IEEE en
dc.subject Deconvolution en
dc.subject Sea floor en
dc.subject Seismic signal processing en
dc.subject Underwater acoustic propagation en
dc.title Measurement of sound-speed gradients in deep-ocean sediments usingl_{1}deconvolution techniques en
dc.type Article en

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