Ebook: Full Field Inversion Methods in Ocean and Seismo-Acoustics

Recent advances in the power of inversion methods, the accuracy of acoustic field prediction codes, and the speed of digital computers have made the full field inversion of ocean and seismic parameters on a large scale a practical possibility. These methods exploit amplitude and phase information detected on hydrophone/geophone arrays, thereby extending traditional inversion schemes based on time of flight measurements. Full field inversion methods provide environmental information by minimising the mismatch between measured and predicted acoustic fields through a global search of possible environmental parameters.
Full Field Inversion Methods in Ocean and Seismo-Acoustics is the formal record of a conference held in Italy in June 1994, sponsored by NATO SACLANT Undersea Research Centre. It includes papers by NATO specialists and others. Topics covered include:
· speed and accuracy of acoustic field prediction codes
· signal processing strategies
· global inversion algorithms
· search spaces of environmental parameters
· environmental stochastic limitations
· special purpose computer architectures
· measurement geometries
· source and receiving sensor technologies.

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Recent advances in the power of inversion methods, the accuracy of acoustic field prediction codes, and the speed of digital computers have made the full field inversion of ocean and seismic parameters on a large scale a practical possibility. These methods exploit amplitude and phase information detected on hydrophone/geophone arrays, thereby extending traditional inversion schemes based on time of flight measurements. Full field inversion methods provide environmental information by minimising the mismatch between measured and predicted acoustic fields through a global search of possible environmental parameters.
Full Field Inversion Methods in Ocean and Seismo-Acoustics is the formal record of a conference held in Italy in June 1994, sponsored by NATO SACLANT Undersea Research Centre. It includes papers by NATO specialists and others. Topics covered include:
· speed and accuracy of acoustic field prediction codes
· signal processing strategies
· global inversion algorithms
· search spaces of environmental parameters
· environmental stochastic limitations
· special purpose computer architectures
· measurement geometries
· source and receiving sensor technologies.

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Recent advances in the power of inversion methods, the accuracy of acoustic field prediction codes, and the speed of digital computers have made the full field inversion of ocean and seismic parameters on a large scale a practical possibility. These methods exploit amplitude and phase information detected on hydrophone/geophone arrays, thereby extending traditional inversion schemes based on time of flight measurements. Full field inversion methods provide environmental information by minimising the mismatch between measured and predicted acoustic fields through a global search of possible environmental parameters.
Full Field Inversion Methods in Ocean and Seismo-Acoustics is the formal record of a conference held in Italy in June 1994, sponsored by NATO SACLANT Undersea Research Centre. It includes papers by NATO specialists and others. Topics covered include:
· speed and accuracy of acoustic field prediction codes
· signal processing strategies
· global inversion algorithms
· search spaces of environmental parameters
· environmental stochastic limitations
· special purpose computer architectures
· measurement geometries
· source and receiving sensor technologies.

Content:
Front Matter....Pages i-xvi
Front Matter....Pages 1-2
Model Validation for Direct and Inverse Problems....Pages 3-8
Parallelism in Ocean Acoustic Computations....Pages 9-14
Propagation and Inversion in Complex Ocean Environments....Pages 15-20
Fast and Accurate Finite Element Methods for the Numerical Prediction of the Acoustic Field....Pages 21-26
Direct Wave Propagation in the Frequency Domain via the Dirichlet-to-Neumann Operator Symbol....Pages 27-32
Efficient Acoustic Field Computation for Estimating Geoacoustic Bottom Parameters Using Matched-Field Inversion....Pages 33-38
Weakly Divergent Bundles of Rays and Their Possible Use in Inverse Methods of Ocean Acoustics....Pages 39-44
Parallel Implementation of a 3-D Range-Dependent Ray Model for Replica Field Generation....Pages 45-50
Some Improvement of the Shortest Path Ray Tracing Algorithm....Pages 51-56
A Three-Dimensional, Broadband, Coupled Normal-Mode Sound Propagation Modeling Approach....Pages 57-62
Development of an Acoustic Field Predictor in a Three Dimensional Oceanic Environment....Pages 63-68
Three-Dimensional Sound Propagation in an Ocean Overlying an Elastic Bottom....Pages 69-75
Front Matter....Pages 77-77
Parameter Estimation Theory Bounds and the Accuracy of Full Field Inversions....Pages 79-84
Physics-Imposed Resolution and Robustness Issues in Seismo-Acoustic Parameter Inversion....Pages 85-90
Statistical Approach to Ocean Acoustic Tomography, Cramer-Rao Bounds for Accuracy of Sound-Speed Field Reconstruction....Pages 91-95
Statistical Formulation of Ray, Interference and Mode Acoustic Tomography and Its Potential Accuracy Evaluation....Pages 97-101
Precision and Sensitivity of Coherent and Incoherent Inversion Methods: A Comparative Study....Pages 103-108
A Sensitivity Study for Full-Field Inversion of Geo-Acoustic Data with a Towed Array in Shallow Water....Pages 109-114
Optimizing Environmental Parametrization and Experimental Design for Shallow Water Sound Speed Inversion....Pages 115-120
Iterative Full-Field Inversion Using Simulated Annealing....Pages 121-126
Front Matter....Pages 77-77
A Comparative Study of Two Wave-Theoretic Inversion Schemes in Ocean Acoustic Tomography....Pages 127-132
Direct Inverse Estimation for a Fluctuating Shallow Water Environment....Pages 133-138
Null Space Reduction in the Linearized Tomographic Inversion....Pages 139-145
Non-Linear Inversion of Seismic Data by Successive Approximation of Model Parameter Probability Distribution Functions....Pages 147-152
Experimental Confirmation of Focalization....Pages 153-158
Estimation of Bottom Parameters from Real Data by Genetic Algorithms....Pages 159-164
Matched Field Inversion for Geoacoustic Properties of Young Oceanic Crust....Pages 165-170
Determination of the Geoacoustical Parameters of a Sedimentary Layer from Surface Acoustic Waves: A Neural Network Approach....Pages 171-176
Seafloor Parameter Estimation: Approximating the Inverse Map Through RBF Networks....Pages 177-182
Feature Extraction and Classification of Underwater Acoustic Signals....Pages 183-188
Model-Based Matched Filter Processing: A Broadband Approach to Shallow-Water Inversion....Pages 189-194
Model-Based Inversion for a Shallow Ocean Application....Pages 195-201
Front Matter....Pages 203-203
A Large Dynamic Range Vertical Array of Acoustic Sensors....Pages 205-210
Low-Frequency Transducer Technology in Ukraine....Pages 211-216
Low-Frequency Sources for Ocean Acoustic Tomography....Pages 217-222
Transducers for Low-Frequency Communications....Pages 223-228
A Low Diffraction Beam Technique for Scanning in the Shallow Ocean....Pages 229-234
Front Matter....Pages 235-235
Forward Modeling of the Barents Sea Tomography Vertical Line Array Data and Inversion Highlights....Pages 237-242
Long Vertical Arrays in Acoustical Sounding of the Ocean....Pages 243-248
Study of the Significance of an Improvement in Tomography Methodology through a Joint Assessment of Arrival Angles and Times....Pages 249-254
Front Matter....Pages 235-235
Acoustic Modeling and Measurements in the Bay of Biscay in a Double SOFAR Channel....Pages 255-260
A Full Field Inversion Method for Acoustic Tomography of Ocean Currents....Pages 261-266
Depth Variation of Acoustic Horizontal Refraction through a Cold-Core Ocean Eddy....Pages 267-272
Stochastic Bathymetric Effects on Matched Field Processing....Pages 273-278
Matched-Field Inversion for Source Location and Equivalent Bathymetry....Pages 279-284
The Inversion Kernel in Group Travel Time Tomography....Pages 285-290
Travel Time Inversion of Marine Seismic Data for Ocean Sound Speed Reconstruction....Pages 291-296
Front Matter....Pages 297-297
Waveform Inversion for Geoacoustic Parameters of the Ocean Bottom in Shallow Water : Matched Mode Method....Pages 299-304
A Review of Modal Inversion Methods for Inferring Geoacoustic Properties in Shallow Water....Pages 305-310
Experimental Techniques for Bottom Parameter Inversion in Shallow Water....Pages 311-316
Global Inversion of Acoustic Field Data in Shallow Water Using Genetic Algorithms....Pages 317-322
Improving the Sensitivity of Full-Field Geoacoustic Inversion for Estimating Bottom Sound Speed Profiles....Pages 323-328
Modal Analysis of Data from Synthetic Aperture Arrays in a Shallow Water Waveguide Using a Non Linear Multidimensional Parametric Method....Pages 329-334
Matched Field 3-D Tomographic Inversion....Pages 335-340
Experimental Horizontal Wavenumber Spectra and Implications for Full Field Processing....Pages 341-346
Inverting Ambient Noise in Shallow Water for the Bottom Geo-Acoustic Parameters....Pages 347-352
Inversion and Sandy Ocean Sediments....Pages 353-358
Bottom Parameter Estimations in Shallow Water by Means of Field Inversion Methods....Pages 359-364
Influences of Sediment Variability on Broadband Acoustic Wave Propagation in Shallow Water....Pages 365-370
Shear Wave Properties From Inversion of Scholte Wave Data....Pages 371-376
Front Matter....Pages 297-297
Full Waveform Inversion of Seismic Interface Wave Data....Pages 377-382
Detection of High Shear Wave Velocities in Marine Sediment by Inversion with Simulated Annealing....Pages 383-388
Modeling and Inversion of the Elasto-Dynamic Equations....Pages 389-394
Linearized Inversion in Viscoelastic Media....Pages 395-400
Inverting Sea Bed Acoustic Parameters from Reverberation Data....Pages 401-406
Back Matter....Pages 407-421

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Recent advances in the power of inversion methods, the accuracy of acoustic field prediction codes, and the speed of digital computers have made the full field inversion of ocean and seismic parameters on a large scale a practical possibility. These methods exploit amplitude and phase information detected on hydrophone/geophone arrays, thereby extending traditional inversion schemes based on time of flight measurements. Full field inversion methods provide environmental information by minimising the mismatch between measured and predicted acoustic fields through a global search of possible environmental parameters.
Full Field Inversion Methods in Ocean and Seismo-Acoustics is the formal record of a conference held in Italy in June 1994, sponsored by NATO SACLANT Undersea Research Centre. It includes papers by NATO specialists and others. Topics covered include:
· speed and accuracy of acoustic field prediction codes
· signal processing strategies
· global inversion algorithms
· search spaces of environmental parameters
· environmental stochastic limitations
· special purpose computer architectures
· measurement geometries
· source and receiving sensor technologies.

Content:
Front Matter....Pages i-xvi
Front Matter....Pages 1-2
Model Validation for Direct and Inverse Problems....Pages 3-8
Parallelism in Ocean Acoustic Computations....Pages 9-14
Propagation and Inversion in Complex Ocean Environments....Pages 15-20
Fast and Accurate Finite Element Methods for the Numerical Prediction of the Acoustic Field....Pages 21-26
Direct Wave Propagation in the Frequency Domain via the Dirichlet-to-Neumann Operator Symbol....Pages 27-32
Efficient Acoustic Field Computation for Estimating Geoacoustic Bottom Parameters Using Matched-Field Inversion....Pages 33-38
Weakly Divergent Bundles of Rays and Their Possible Use in Inverse Methods of Ocean Acoustics....Pages 39-44
Parallel Implementation of a 3-D Range-Dependent Ray Model for Replica Field Generation....Pages 45-50
Some Improvement of the Shortest Path Ray Tracing Algorithm....Pages 51-56
A Three-Dimensional, Broadband, Coupled Normal-Mode Sound Propagation Modeling Approach....Pages 57-62
Development of an Acoustic Field Predictor in a Three Dimensional Oceanic Environment....Pages 63-68
Three-Dimensional Sound Propagation in an Ocean Overlying an Elastic Bottom....Pages 69-75
Front Matter....Pages 77-77
Parameter Estimation Theory Bounds and the Accuracy of Full Field Inversions....Pages 79-84
Physics-Imposed Resolution and Robustness Issues in Seismo-Acoustic Parameter Inversion....Pages 85-90
Statistical Approach to Ocean Acoustic Tomography, Cramer-Rao Bounds for Accuracy of Sound-Speed Field Reconstruction....Pages 91-95
Statistical Formulation of Ray, Interference and Mode Acoustic Tomography and Its Potential Accuracy Evaluation....Pages 97-101
Precision and Sensitivity of Coherent and Incoherent Inversion Methods: A Comparative Study....Pages 103-108
A Sensitivity Study for Full-Field Inversion of Geo-Acoustic Data with a Towed Array in Shallow Water....Pages 109-114
Optimizing Environmental Parametrization and Experimental Design for Shallow Water Sound Speed Inversion....Pages 115-120
Iterative Full-Field Inversion Using Simulated Annealing....Pages 121-126
Front Matter....Pages 77-77
A Comparative Study of Two Wave-Theoretic Inversion Schemes in Ocean Acoustic Tomography....Pages 127-132
Direct Inverse Estimation for a Fluctuating Shallow Water Environment....Pages 133-138
Null Space Reduction in the Linearized Tomographic Inversion....Pages 139-145
Non-Linear Inversion of Seismic Data by Successive Approximation of Model Parameter Probability Distribution Functions....Pages 147-152
Experimental Confirmation of Focalization....Pages 153-158
Estimation of Bottom Parameters from Real Data by Genetic Algorithms....Pages 159-164
Matched Field Inversion for Geoacoustic Properties of Young Oceanic Crust....Pages 165-170
Determination of the Geoacoustical Parameters of a Sedimentary Layer from Surface Acoustic Waves: A Neural Network Approach....Pages 171-176
Seafloor Parameter Estimation: Approximating the Inverse Map Through RBF Networks....Pages 177-182
Feature Extraction and Classification of Underwater Acoustic Signals....Pages 183-188
Model-Based Matched Filter Processing: A Broadband Approach to Shallow-Water Inversion....Pages 189-194
Model-Based Inversion for a Shallow Ocean Application....Pages 195-201
Front Matter....Pages 203-203
A Large Dynamic Range Vertical Array of Acoustic Sensors....Pages 205-210
Low-Frequency Transducer Technology in Ukraine....Pages 211-216
Low-Frequency Sources for Ocean Acoustic Tomography....Pages 217-222
Transducers for Low-Frequency Communications....Pages 223-228
A Low Diffraction Beam Technique for Scanning in the Shallow Ocean....Pages 229-234
Front Matter....Pages 235-235
Forward Modeling of the Barents Sea Tomography Vertical Line Array Data and Inversion Highlights....Pages 237-242
Long Vertical Arrays in Acoustical Sounding of the Ocean....Pages 243-248
Study of the Significance of an Improvement in Tomography Methodology through a Joint Assessment of Arrival Angles and Times....Pages 249-254
Front Matter....Pages 235-235
Acoustic Modeling and Measurements in the Bay of Biscay in a Double SOFAR Channel....Pages 255-260
A Full Field Inversion Method for Acoustic Tomography of Ocean Currents....Pages 261-266
Depth Variation of Acoustic Horizontal Refraction through a Cold-Core Ocean Eddy....Pages 267-272
Stochastic Bathymetric Effects on Matched Field Processing....Pages 273-278
Matched-Field Inversion for Source Location and Equivalent Bathymetry....Pages 279-284
The Inversion Kernel in Group Travel Time Tomography....Pages 285-290
Travel Time Inversion of Marine Seismic Data for Ocean Sound Speed Reconstruction....Pages 291-296
Front Matter....Pages 297-297
Waveform Inversion for Geoacoustic Parameters of the Ocean Bottom in Shallow Water : Matched Mode Method....Pages 299-304
A Review of Modal Inversion Methods for Inferring Geoacoustic Properties in Shallow Water....Pages 305-310
Experimental Techniques for Bottom Parameter Inversion in Shallow Water....Pages 311-316
Global Inversion of Acoustic Field Data in Shallow Water Using Genetic Algorithms....Pages 317-322
Improving the Sensitivity of Full-Field Geoacoustic Inversion for Estimating Bottom Sound Speed Profiles....Pages 323-328
Modal Analysis of Data from Synthetic Aperture Arrays in a Shallow Water Waveguide Using a Non Linear Multidimensional Parametric Method....Pages 329-334
Matched Field 3-D Tomographic Inversion....Pages 335-340
Experimental Horizontal Wavenumber Spectra and Implications for Full Field Processing....Pages 341-346
Inverting Ambient Noise in Shallow Water for the Bottom Geo-Acoustic Parameters....Pages 347-352
Inversion and Sandy Ocean Sediments....Pages 353-358
Bottom Parameter Estimations in Shallow Water by Means of Field Inversion Methods....Pages 359-364
Influences of Sediment Variability on Broadband Acoustic Wave Propagation in Shallow Water....Pages 365-370
Shear Wave Properties From Inversion of Scholte Wave Data....Pages 371-376
Front Matter....Pages 297-297
Full Waveform Inversion of Seismic Interface Wave Data....Pages 377-382
Detection of High Shear Wave Velocities in Marine Sediment by Inversion with Simulated Annealing....Pages 383-388
Modeling and Inversion of the Elasto-Dynamic Equations....Pages 389-394
Linearized Inversion in Viscoelastic Media....Pages 395-400
Inverting Sea Bed Acoustic Parameters from Reverberation Data....Pages 401-406
Back Matter....Pages 407-421
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