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On the Feasibility of a Matched-Field Inversion in a Three-Dimensional Oceanic Environment Ignoring Out-of-Plane Propagation | IEEE Journals & Magazine | IEEE Xplore

On the Feasibility of a Matched-Field Inversion in a Three-Dimensional Oceanic Environment Ignoring Out-of-Plane Propagation


Abstract:

Inverse problems in ocean acoustics are based on 2-D modeling of sound propagation, hence ignoring the effects of horizontal refraction, referred to as 3-D propagation ef...Show More

Abstract:

Inverse problems in ocean acoustics are based on 2-D modeling of sound propagation, hence ignoring the effects of horizontal refraction, referred to as 3-D propagation effects. However, the acoustic propagation in shallow-water environments, such as the continental shelf, may be affected by 3-D effects requiring 3-D modeling to be accounted for. The aim of this work is to investigate the importance of the 3-D effects with respect to the performance and reliability of typical 2-D-model-based inversion procedures of ocean acoustics. The study is carried out on a well-established synthetic test case which exhibits well-known 3-D effects. A matched-field inversion procedure is implemented based on the exhaustive search over the parameter space. The feasibility and the limits of inverting low-frequency noisy 3-D synthetic data for some parameters describing the test case by matching replica from 2-D computations are explored. Both synthetic data and replica are generated using a parabolic-equation-based code. This approach highlights the relevance of using 2-D propagation models when inversions are performed at relatively short ranges from the source. On the other hand, important mismatch occurs when inverting at farther ranges, demonstrating that the use of fully 3-D forward models is required.
Published in: IEEE Journal of Oceanic Engineering ( Volume: 36, Issue: 4, October 2011)
Page(s): 716 - 727
Date of Publication: 11 August 2011

ISSN Information:

Author image of Alexios Korakas
Laboratoire de Mécanique des Fluides et dAcoustique, LMFA, UMR 5509, CNRS-ECL-UCBL1-INSA Lyon, Ecully, France
Alexios Korakas (M'08) received the B.Sc. degree in physics from the University of Crete, Heraklion, Greece, in 2005, the M.Sc. degree in acoustics from the University of Provence, Marseille, France, in 2006, and the Ph.D. degree in acoustics from the Ecole Centrale de Lyon, Ecully, France, in 2010.
From 2006 to 2010, he led his doctoral research at the Acoustics and Fluid Mechanics Laboratory (LMFA, UMR CNRS 5509). His re...Show More
Alexios Korakas (M'08) received the B.Sc. degree in physics from the University of Crete, Heraklion, Greece, in 2005, the M.Sc. degree in acoustics from the University of Provence, Marseille, France, in 2006, and the Ph.D. degree in acoustics from the Ecole Centrale de Lyon, Ecully, France, in 2010.
From 2006 to 2010, he led his doctoral research at the Acoustics and Fluid Mechanics Laboratory (LMFA, UMR CNRS 5509). His re...View more
Author image of Frédéric Sturm
Laboratoire de Mécanique des Fluides et dAcoustique, LMFA, UMR 5509, CNRS-ECL-UCBL1-INSA Lyon, Ecully, France
Frédéric Sturm was born in Toulon, France, in 1969. He received the M.Sc. degree in applied mathematics from the University of Aix-Marseille I, Marseille, France, in 1993 and the Ph.D. degree in acoustics from the University of Toulon, Toulon, France, in 1997.
After his doctoral dissertation, he was a Summer Research Assistant at the NATO SACLANT Undersea Research Centre, La Spezia, Italy. From 1998 to 1999, he accomplishe...Show More
Frédéric Sturm was born in Toulon, France, in 1969. He received the M.Sc. degree in applied mathematics from the University of Aix-Marseille I, Marseille, France, in 1993 and the Ph.D. degree in acoustics from the University of Toulon, Toulon, France, in 1997.
After his doctoral dissertation, he was a Summer Research Assistant at the NATO SACLANT Undersea Research Centre, La Spezia, Italy. From 1998 to 1999, he accomplishe...View more

Author image of Alexios Korakas
Laboratoire de Mécanique des Fluides et dAcoustique, LMFA, UMR 5509, CNRS-ECL-UCBL1-INSA Lyon, Ecully, France
Alexios Korakas (M'08) received the B.Sc. degree in physics from the University of Crete, Heraklion, Greece, in 2005, the M.Sc. degree in acoustics from the University of Provence, Marseille, France, in 2006, and the Ph.D. degree in acoustics from the Ecole Centrale de Lyon, Ecully, France, in 2010.
From 2006 to 2010, he led his doctoral research at the Acoustics and Fluid Mechanics Laboratory (LMFA, UMR CNRS 5509). His research focused on both the experimental and numerical aspects of 3-D ocean acoustic propagation in shallow-water environments with respect to inversion. His research interests are in the area of inverse problems with applications to ocean acoustics.
Dr. Korakas is a Member of the Acoustical Society of America.
Alexios Korakas (M'08) received the B.Sc. degree in physics from the University of Crete, Heraklion, Greece, in 2005, the M.Sc. degree in acoustics from the University of Provence, Marseille, France, in 2006, and the Ph.D. degree in acoustics from the Ecole Centrale de Lyon, Ecully, France, in 2010.
From 2006 to 2010, he led his doctoral research at the Acoustics and Fluid Mechanics Laboratory (LMFA, UMR CNRS 5509). His research focused on both the experimental and numerical aspects of 3-D ocean acoustic propagation in shallow-water environments with respect to inversion. His research interests are in the area of inverse problems with applications to ocean acoustics.
Dr. Korakas is a Member of the Acoustical Society of America.View more
Author image of Frédéric Sturm
Laboratoire de Mécanique des Fluides et dAcoustique, LMFA, UMR 5509, CNRS-ECL-UCBL1-INSA Lyon, Ecully, France
Frédéric Sturm was born in Toulon, France, in 1969. He received the M.Sc. degree in applied mathematics from the University of Aix-Marseille I, Marseille, France, in 1993 and the Ph.D. degree in acoustics from the University of Toulon, Toulon, France, in 1997.
After his doctoral dissertation, he was a Summer Research Assistant at the NATO SACLANT Undersea Research Centre, La Spezia, Italy. From 1998 to 1999, he accomplished his postdoctoral research at the GESMA centre in Brest, France. Since 1999, he has been Assistant Professor at the INSA Engineering School, Lyon, France, where he teaches mathematics and numerical analysis in the internationally oriented section ASINSA. He is a coauthor of mathematics textbooks. He is involved in research activities of the Acoustics and Fluid Mechanics Laboratory (LMFA, UMR CNRS 5509-ECL-UCBL1-INSA Lyon). His current research interests include acoustic propagation and inversion problems in 3-D oceanic environments. His research combines both theoretical and experimental studies.
Frédéric Sturm was born in Toulon, France, in 1969. He received the M.Sc. degree in applied mathematics from the University of Aix-Marseille I, Marseille, France, in 1993 and the Ph.D. degree in acoustics from the University of Toulon, Toulon, France, in 1997.
After his doctoral dissertation, he was a Summer Research Assistant at the NATO SACLANT Undersea Research Centre, La Spezia, Italy. From 1998 to 1999, he accomplished his postdoctoral research at the GESMA centre in Brest, France. Since 1999, he has been Assistant Professor at the INSA Engineering School, Lyon, France, where he teaches mathematics and numerical analysis in the internationally oriented section ASINSA. He is a coauthor of mathematics textbooks. He is involved in research activities of the Acoustics and Fluid Mechanics Laboratory (LMFA, UMR CNRS 5509-ECL-UCBL1-INSA Lyon). His current research interests include acoustic propagation and inversion problems in 3-D oceanic environments. His research combines both theoretical and experimental studies.View more

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