FN Archimer Export Format
PT J
TI Multiresolution seismic data fusion with a generalized wavelet-based method to derive subseabed acoustic properties
BT 
AF KER, Stephan
   LE GONIDEC, Y.
   GIBERT, D.
AS 1:1;2:2;3:3;
FF 1:PDG-REM-GM;2:;3:;
C1 IFREMER, Ctr Brest, F-29280 Plouzane, France.
   Univ Rennes 1, Geosci Rennes, CNRS UMR 6118, F-35042 Rennes, France.
   Sorbonne Paris Cite, Inst Phys Globe Paris, CNRS UMR 7154, F-75238 Paris, France.
C2 IFREMER, FRANCE
   UNIV RENNES, FRANCE
   IPGP, FRANCE
SI BREST
SE PDG-REM-GM
IN WOS Ifremer jusqu'en 2018
   copubli-france
   copubli-univ-france
IF 2.724
TC 4
TU Centre national de la recherche scientifique
   Institut National de l'Information Géographique et Forestière
   Institut de physique du globe
   Université Paris Diderot
   Université Pierre et Marie Curie
   Université de La Réunion
   Université de Rennes 1
UR https://archimer.ifremer.fr/doc/00157/26824/24935.pdf
LA English
DT Article
CR ERIG 3D
BO Pourquoi pas ?
DE ;Wavelet transform;Wave propagation;Acoustic properties
AB In the context of multiscale seismic analysis of complex reflectors, that takes benefit from broad-band frequency range considerations, we perform a wavelet-based method to merge multiresolution seismic sources based on generalized Lévy-alpha stable functions. The frequency bandwidth limitation of individual seismic sources induces distortions in wavelet responses (WRs), and we show that Gaussian fractional derivative functions are optimal wavelets to fully correct for these distortions in the merged frequency range. The efficiency of the method is also based on a new wavelet parametrization, that is the breadth of the wavelet, where the dominant dilation is adapted to the wavelet formalism. As a first demonstration to merge multiresolution seismic sources, we perform the source-correction with the high and very high resolution seismic sources of the SYSIF deep-towed device and we show that both can now be perfectly merged into an equivalent seismic source with a broad-band frequency bandwidth (220–2200 Hz). Taking advantage of this new multiresolution seismic data fusion, the potential of the generalized wavelet-based method allows reconstructing the acoustic impedance profile of the subseabed, based on the inverse wavelet transform properties extended to the source-corrected WR. We highlight that the fusion of seismic sources improves the resolution of the impedance profile and that the density structure of the subseabed can be assessed assuming spatially homogeneous large scale features of the subseabed physical properties.
PY 2013
PD NOV
SO Geophysical Journal International
SN 0956-540X
PU Oxford Univ Press
VL 195
IS 2
UT 000325770900046
BP 1370
EP 1383
DI 10.1093/gji/ggt317
ID 26824
ER

EF