Sediment Geo-Probe System

Metadata Updated: March 8, 2017

FUNCTION: Provides wideband in situ measurement capability of compressional wave speed and attenuation and their spatial variability in marine sediments.DESCRIPTION: In situ ground-truth measurements of sound speed and attenuation are needed to validate geoacoustic inversion algorithms or high-resolution subbottom profiling techniques that are being used for bottom characterization. The wideband capability provides unique measurements of frequency dependency of sound speed and attenuation in various types of marine sediments. In addition, tomographic measurements ofsediment sound-speed variability can be used to validate bottom scattering models. The system can be used to characterize large geological provinces in survey mode since the required measurement time per site is about 10 minutes.INSTRUMENTATION: The geo-probe system has four probes populated with 1-inch-diameter ring transducers (Channel Industries) and a data acquisition unit with networking capability. The data acquisition unit can be pre-programmed or controlled through a standard oceanographic CTD cable. Wideband pulses (3-150 kHz) are generated and recorded with a sampling rate of 1 MHz. The system can be deployed at depths up to 1500 m and probe lengths can be varied up to 2 m. The source and receiver arrays on each probe allow spatial variability measurements of compressional wave speed and attenuation by using acoustic tomography.

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Public: This dataset is intended for public access and use. License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

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Dates

Metadata Created Date March 8, 2017
Metadata Updated Date March 8, 2017

Metadata Source

Harvested from Federal Laboratory Consortium Data.json

Additional Metadata

Resource Type Dataset
Metadata Created Date March 8, 2017
Metadata Updated Date March 8, 2017
Publisher Federal Laboratory Consortium
Unique Identifier DF46693B-F62D-4E40-8779-B48AA95FCF30
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Schema Version https://project-open-data.cio.gov/v1.1/schema
Catalog Describedby https://project-open-data.cio.gov/v1.1/schema/catalog.json
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Flcbusinessurl https://flcbusiness.federallabs.org/#/laboratory/3380
Harvest Object Id 24d6bc0f-a569-4e23-93a0-7777fee1d4e8
Harvest Source Id 5859cfed-553c-48de-a478-b67b5225f6fc
Harvest Source Title Federal Laboratory Consortium Data.json
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Repphone (202) 404-8620
Sizesqft 0
Source Datajson Identifier True
Source Hash 21cb4582c9160f576129a0e96e6ae74ac408265c
Source Schema Version 1.1
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