Reflection coefficient calculation from marine high-resolution seismic reflection (Chirp) data
Reflection coefficient calculation from marine high-resolution seismic reflection (Chirp) data
Chirp sub-bottom profilers produce high-resolution images of the near-surface. An attribute of the sea-bed reflection in chirp data are fluctuations in polarity between adjacent traces. Two models are proposed and presented to explain this: the first incorporates changes in an acoustic impedance gradient at the sea bed; the second uses changes in the thickness of the uppermost sediment layer. Mixing of adjacent traces produces a consistent polarity for the sea-bed reflector. Reflection coefficients are calculated, using amplitude information derived from single-traces, and polarity information from trace mixing, with application to a marine archaeological case study. The reflection coefficient calculated for the top of a buried 18th century wooden wreck is -0.26.
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Bull, Jonathan M.
974037fd-544b-458f-98cc-ce8eca89e3c8
Quinn, Rory
692c435a-eecc-4f4b-8ec6-b54596ae4ca3
Dix, Justin K.
efbb0b6e-7dfd-47e1-ae96-92412bd45628
February 1998
Bull, Jonathan M.
974037fd-544b-458f-98cc-ce8eca89e3c8
Quinn, Rory
692c435a-eecc-4f4b-8ec6-b54596ae4ca3
Dix, Justin K.
efbb0b6e-7dfd-47e1-ae96-92412bd45628
Bull, Jonathan M., Quinn, Rory and Dix, Justin K.
(1998)
Reflection coefficient calculation from marine high-resolution seismic reflection (Chirp) data.
Marine Geophysical Researches, 20, .
(doi:10.1023/A:1004373106696).
Abstract
Chirp sub-bottom profilers produce high-resolution images of the near-surface. An attribute of the sea-bed reflection in chirp data are fluctuations in polarity between adjacent traces. Two models are proposed and presented to explain this: the first incorporates changes in an acoustic impedance gradient at the sea bed; the second uses changes in the thickness of the uppermost sediment layer. Mixing of adjacent traces produces a consistent polarity for the sea-bed reflector. Reflection coefficients are calculated, using amplitude information derived from single-traces, and polarity information from trace mixing, with application to a marine archaeological case study. The reflection coefficient calculated for the top of a buried 18th century wooden wreck is -0.26.
Text
Bull et al 1998 MGR Reflection Coefficients.pdf
- Accepted Manuscript
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Published date: February 1998
Organisations:
Geology & Geophysics
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Local EPrints ID: 346549
URI: http://eprints.soton.ac.uk/id/eprint/346549
ISSN: 0025-3235
PURE UUID: 9743dacd-2e12-4327-9c54-19272f2e019d
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Date deposited: 02 Jan 2013 11:07
Last modified: 15 Mar 2024 02:46
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Author:
Rory Quinn
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