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Reflection coefficient calculation from marine high resolution seismic reflection (Chirp) data and application to an archaeological case study

Bull, JM, Quinn, R and Dix, JK (1998) Reflection coefficient calculation from marine high resolution seismic reflection (Chirp) data and application to an archaeological case study. MARINE GEOPHYSICAL RESEARCHES, 20 (1). pp. 1-11. [Journal article]

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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.

Item Type:Journal article
Faculties and Schools:Faculty of Life and Health Sciences
Research Institutes and Groups:Environmental Sciences Research Institute
Environmental Sciences Research Institute > Maritime Archaeology
ID Code:14473
Deposited By: Dr Rory Quinn
Deposited On:29 Jun 2010 07:32
Last Modified:09 Dec 2015 10:49

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