DocumentCode
2948683
Title
Real time dereverberation and signal processing of marine seismic reflection profiles
Author
Barrett, D.L. ; Keen, C.E. ; Moon, W.D.
Author_Institution
Atlantic Geoscience Centre, Bedford Istitute of Oceanography, Dartmouth, NS, Canada
fYear
1972
fDate
13-15 Sept. 1972
Firstpage
544
Lastpage
549
Abstract
A real time dereverberator was tested in an attempt to eliminate multiples on marine reflection seismograms. The whole system consists of a 
-m sectional array, a slacking winch used to stop the array during the recording period, a 1000-in3airgun with a pulse shaper, four programmed gain amplifiers, a time varying mixer, a time varying bandpass filter and a real-time correlator and dereverberation filter. A peak pressure noise figure of less than 1 
bar in the frequency band of 16 to 60 Hz is attained with the system. Record comparisons are presented to show the advantages of the various components of the system. Dereverberated records expose real events which are otherwise masked by multiples.
-m sectional array, a slacking winch used to stop the array during the recording period, a 1000-in3airgun with a pulse shaper, four programmed gain amplifiers, a time varying mixer, a time varying bandpass filter and a real-time correlator and dereverberation filter. A peak pressure noise figure of less than 1 bar in the frequency band of 16 to 60 Hz is attained with the system. Record comparisons are presented to show the advantages of the various components of the system. Dereverberated records expose real events which are otherwise masked by multiples.Keywords
Active filters; Autocorrelation; Frequency; Low-frequency noise; Low-noise amplifiers; Marine vehicles; Noise level; Reflection; Signal to noise ratio; Winches;
fLanguage
English
Publisher
ieee
Conference_Titel
Engineering in the Ocean Environment, Ocean 72 - IEEE International Conference on
Conference_Location
Newport, RI, USA
Type
conf
DOI
10.1109/OCEANS.1972.1161122
Filename
1161122
Link To Document