FN Archimer Export Format
PT J
TI Forward modeling for marine sediment characterization using chirp sonars
BT 
AF RAKOTONARIVO, Sandrine
   LEGRIS, Michel
   DESMARE, Rozenn
   SESSAREGO, Jean-Pierre
   BOURILLET, Jean-Francois
AS 1:1,2;2:2;3:3;4:4;5:5;
FF 1:;2:;3:;4:;5:PDG-REM-GM-LES;
C1 Univ Calif San Diego, Scripps Inst Oceanog, Marine Phys Lab, La Jolla, CA 92093 USA.
   Univ Europeenne Bretagne, Ecole Natl Super Tech Avancees ENSTA Bretagne, Lab Extract & Exploitat Informat Environm Incerta, Brest, France.
   Inst Rech Ecole Navale IRENav, Brest, France.
   CNRS, LMA, Marseille, France.
   Inst Francais Rech Exploitat Mer IFREMER, Unite Rech Geosci Marines, Plouzane, France.
C2 UNIV CALIF SAN DIEGO, USA
   UEB, FRANCE
   IRENAV, FRANCE
   CNRS, FRANCE
   IFREMER, FRANCE
   ENSTA BRETAGNE, FRANCE
SI BREST
SE PDG-REM-GM-LES
IN WOS Ifremer jusqu'en 2018
   copubli-france
   copubli-univ-france
   copubli-int-hors-europe
IF 1.418
TC 6
UR https://archimer.ifremer.fr/doc/00039/15053/12380.pdf
LA English
DT Article
AB This paper investigates the forward modeling of chirp-sonar data for the quantitative characterization of marine subbottom sediment between 1 and 10 kHz. The forward modeling, based on a transfer function approach, included impacts of layering or impedance mismatch, attenuation, roughness, and transitional layers, i.e., continuous impedance variations. The presented approach provided the best compromise between the number of available geoacoustic parameters from chirp-sonar data and the subbottom modeling accuracy. The forward model was tested on deep-sea chirp-sonar data acquired at a central frequency of 3.5 kHz. Comparisons between synthetic and experimental seismograms showed good agreement for the first 15 m of buried layers. Performance of the inversion using this forward model was also examined through sensitivity analysis. The results suggested that estimations of layer thickness, impedance, and transitional layer thickness were robust, whereas roughness and attenuation estimations were subject to wavelength and layer thickness conditions.
PY 2011
PD JUN
SO Geophysics
SN 0016-8033
PU Soc Exploration Geophysicists
VL 76
IS 4
UT 000292156200031
DI 10.1190/1.3590717
ID 15053
ER

EF