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Multisource encodin...
Multisource encoding and decoding using the signal apparition technique
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- Amundsen, Lasse (author)
- Statoil ASA,Norwegian University of Science and Technology
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- Andersson, Fredrik (author)
- Lund University,Lunds universitet,Mathematical Imaging Group,Forskargrupper vid Lunds universitet,Lund University Research Groups,Seismic Apparition GmbH
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- van Manen, Dirk Jan (author)
- Seismic Apparition GmbH,ETH Zürich
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- Robertsson, Johan O.A. (author)
- Seismic Apparition GmbH,ETH Zürich
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- Eggenberger, Kurt (author)
- Seismic Apparition GmbH
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(creator_code:org_t)
- 2018
- 2018
- English.
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In: Geophysics. - 0016-8033. ; 83:1, s. 49-59
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Abstract
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- Signal apparition is a method for encoding sources in simultaneous multisource seismic acquisition and decoding the multisource response of the earth into its single-source responses. For M sources, encoding is performed by applying periodic sequences of period M to each of the sources along source lines. Decoding is achieved in the wavenumber domain for each frequency by solving an M × M linear system of equations. The system's matrix is the product of a Fourier matrix and an encoding matrix, the latter containing the information of the codes. The solution of the system is unique when the encoding matrix is invertible. When the encoding sequences consist of time delays applied to sources' firing times, the determinant of the encoding matrix becomes a polynomial. A unique solution to decoding then exists if the roots of the polynomial avoid the unit circle. Periodic time-shift sequences for two, three, four, and six sources are discussed. A model example of simultaneous four-source data acquisition illustrates the performance of the encoding/decoding technique for the spatially nonaliased case.
Subject headings
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Geofysik (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Geophysics (hsv//eng)
Publication and Content Type
- art (subject category)
- ref (subject category)
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