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

Biomedical Sciences Research Institute Computer Science Research Institute Environmental Sciences Research Institute Nanotechnology & Advanced Materials Research Institute

Bull, JM, Quinn, Rory 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:172
Deposited By:Dr Rory Quinn
Deposited On:03 Aug 2009 11:11
Last Modified:15 Jun 2011 11:18

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