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Chirp sub-bottom profiler source signature design and field testing

Chirp sub-bottom profiler source signature design and field testing
Chirp sub-bottom profiler source signature design and field testing
Chirp sub-bottom profilers are marine sonar systems which use a highly repeatable source signature to facilitate the acquisition of correlated data with decimetre vertical resolution in the top 20–30 m of sediments. Source signatures can be readily developed and implemented, but an applicable methodology for assessing resolution and attenuation characteristics of these wide-band systems did not exist. Methodologies are developed and applied to seven contrasting source signatures which occupy the same frequency band, but differ in their Envelope and Instantaneous Frequency functions. For the Chirp source signatures tested, a Sine-Squared envelope function is shown to produce seismic data with the optimum resolution and penetration characteristics.
chirp, high-resolution seismics, marine seismics, reflection seismics, seismic sources
0025-3235
481-492
Gutowski, Martin
cd31d0d7-2bcc-4c54-8b33-610ce765d7e5
Bull, Jon
974037fd-544b-458f-98cc-ce8eca89e3c8
Henstock, Tim
27c450a4-3e6b-41f8-97f9-4e0e181400bb
Dix, Justin
efbb0b6e-7dfd-47e1-ae96-92412bd45628
Hogarth, Peter
655cda79-d358-4f19-9ac1-080d358db76e
Leighton, Tim
3e5262ce-1d7d-42eb-b013-fcc5c286bbae
White, Paul
2dd2477b-5aa9-42e2-9d19-0806d994eaba
Gutowski, Martin
cd31d0d7-2bcc-4c54-8b33-610ce765d7e5
Bull, Jon
974037fd-544b-458f-98cc-ce8eca89e3c8
Henstock, Tim
27c450a4-3e6b-41f8-97f9-4e0e181400bb
Dix, Justin
efbb0b6e-7dfd-47e1-ae96-92412bd45628
Hogarth, Peter
655cda79-d358-4f19-9ac1-080d358db76e
Leighton, Tim
3e5262ce-1d7d-42eb-b013-fcc5c286bbae
White, Paul
2dd2477b-5aa9-42e2-9d19-0806d994eaba

Gutowski, Martin, Bull, Jon, Henstock, Tim, Dix, Justin, Hogarth, Peter, Leighton, Tim and White, Paul (2002) Chirp sub-bottom profiler source signature design and field testing. Marine Geophysical Researches, 23 (5-6), 481-492. (doi:10.1023/B:MARI.0000018247.57117.0e).

Record type: Article

Abstract

Chirp sub-bottom profilers are marine sonar systems which use a highly repeatable source signature to facilitate the acquisition of correlated data with decimetre vertical resolution in the top 20–30 m of sediments. Source signatures can be readily developed and implemented, but an applicable methodology for assessing resolution and attenuation characteristics of these wide-band systems did not exist. Methodologies are developed and applied to seven contrasting source signatures which occupy the same frequency band, but differ in their Envelope and Instantaneous Frequency functions. For the Chirp source signatures tested, a Sine-Squared envelope function is shown to produce seismic data with the optimum resolution and penetration characteristics.

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More information

Published date: September 2002
Keywords: chirp, high-resolution seismics, marine seismics, reflection seismics, seismic sources

Identifiers

Local EPrints ID: 10417
URI: http://eprints.soton.ac.uk/id/eprint/10417
ISSN: 0025-3235
PURE UUID: 79adbb41-33bf-451c-961d-f33eef81632b
ORCID for Tim Henstock: ORCID iD orcid.org/0000-0002-2132-2514
ORCID for Tim Leighton: ORCID iD orcid.org/0000-0002-1649-8750
ORCID for Paul White: ORCID iD orcid.org/0000-0002-4787-8713

Catalogue record

Date deposited: 25 Jul 2005
Last modified: 20 Nov 2021 02:43

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Contributors

Author: Martin Gutowski
Author: Jon Bull
Author: Tim Henstock ORCID iD
Author: Justin Dix
Author: Peter Hogarth
Author: Tim Leighton ORCID iD
Author: Paul White ORCID iD

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