The University of Southampton
University of Southampton Institutional Repository

Reflection coefficient calculation from marine high-resolution seismic reflection (Chirp) data

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.
0025-3235
1-11
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.
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, 1-11. (doi:10.1023/A:1004373106696).

Record type: Article

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.

PDF
Bull et al 1998 MGR Reflection Coefficients.pdf - Accepted Manuscript
Download (866kB)

More information

Published date: February 1998
Organisations: Geology & Geophysics

Identifiers

Local EPrints ID: 346549
URI: https://eprints.soton.ac.uk/id/eprint/346549
ISSN: 0025-3235
PURE UUID: 9743dacd-2e12-4327-9c54-19272f2e019d

Catalogue record

Date deposited: 02 Jan 2013 11:07
Last modified: 18 Jul 2017 05:03

Export record

Altmetrics

Contributors

Author: Rory Quinn
Author: Justin K. Dix

University divisions

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of https://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×