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Ocean acoustic tomography

Auteur : Walter H Munk; Peter Worcester; Carl Wunsch
Éditeur: Cambridge ; New York : Cambridge University Press, 1995.
Collection: Cambridge monographs on mechanics.
Édition/format:   Livre imprimé : AnglaisVoir toutes les éditions et tous les formats
Résumé:
"The problem of ocean acoustic tomography is to infer from precise measurements of travel time, or other properties of acoustic propagation, the state of the ocean traversed by a sound field. Tomography takes advantage of two facts: that travel time and other measurable acoustic parameters are functions of temperature, water velocity, and other parameters of oceanographic interest and can be interpreted to provide  Lire la suite...
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Détails

Type d’ouvrage: Ressource Internet
Type de document: Livre, Ressource Internet
Tous les auteurs / collaborateurs: Walter H Munk; Peter Worcester; Carl Wunsch
ISBN: 0521470951 9780521470957 9780511666926 0511666926
Numéro OCLC: 31609701
Description: xiv, 433 pages, 6 unnumbered pages of plates : illustrations (some color), maps (some color) ; 24 cm.
Contenu: 1. The tomography problem --
1.1 Ocean acoustics --
1.2 The forward and inverse problems --
1.3 Vertical slice: A numerical example --
1.4 Horizontal slice --
1.5 Estimation through time --
1.6 Testing --
1.7 Comparisons and comments --
2. The forward problem: Range-independent --
2.1 The ocean sound channel --
2.2 Sound-speed --
Ray representation --
2.3 Ray theory --
2.4 Ray diagram --
2.5 Action variable --
2.6 Structure of ray arrivals --
2.7 Ray weighting --
2.8 Ray perturbations --
2.9 Parametric and functional perturbation --
Mode representation --
2.10 Modes --
2.11 WKBJ approximation: Ray/mode equivalence --
2.12 Modal t, z-display --
2.13 Ambiguity relations --
2.14 Modal perturbations --
2.15 Perturbation models --
Observations --
2.16 Observations --
Appendix --
2.17 Polar (Adiabatic) profile --
2.18 Temperate (Canonical) profile --
3. Currents --
3.1 Ray theory in an inhomogeneous moving medium --
3.2 Travel-time perturbations --
3.3 Geostrophic flow --
3.4 Circulation, vorticity, and divergence --
3.5 Nonreciprocity --
3.6 Reciprocal-transmission experiments --
4. The forward problem: Range-dependent --
4.1 Adiabatic range dependence --
4.2 Loop resonance --
4.3 Mesoscale variability --
4.4 Internal waves --
4.5 Ray chaos --
4.6 Modes in a range-dependent profile --
4.7 Horizontal refraction --
5. Observational methods --
5.1 The sonar equation --
5.2 Pulse compression --
5.3 Travel time --
5.4 Vertical arrival angle --
5.5 Doppler --
5.6 Timekeeping --
5.7 Positioning --
5.8 Data treatment --
Appendix --
5.9 Binary m-sequences --
6. The inverse problem: Data-oriented --
6.1 Introduction --
6.2 Representation --
6.3 Least-squares --
6.4 Singular-value solution and decomposition --
6.5 Gauss-Markov estimation --
6.6 Variant linear methods --
6.7 Recursive solutions --
6.8 Nonlinear problems and methods --
6.9 Inversions in practice --
6.10 Summary comments --
7. The inverse problem: Model-oriented --
7.1 Introduction: The use of models --
7.2 State estimation and model identification --
7.3 State estimation: Practice --
7.4 Extensions: Control, identification, and adaptive methods --
8. The basin scale --
8.1 Climate variability --
8.2 Some experimental considerations --
8.3 A brief historical review --
8.4 Low-frequency propagation at very long ranges --
8.5 Refracted geodesics --
8.6 Spheroidal caustics --
8.7 Mode stripping and repopulation --
8.8 Basin reverberation --
8.9 The future of basin-scale tomography --
Epilogue: The science of ocean acoustic tomography --
Appendix --
A.A personal chronicle --
B. Ocean acoustic propagation atlas.
Titre de collection: Cambridge monographs on mechanics.
Responsabilité: Walter Munk, Peter Worcester, Carl Wunsch.
Plus d’informations:

Résumé:

This volume presents the underlying oceanography and mathematics necessary to understand and develop a practical system of transmitters and receivers to interpret the behaviour of the oceans. A  Lire la suite...

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'The authors are the leaders of the field, having worked together over the past two decades to develop it. Munk, as the godfather of tomography, has continuously pushed it to new limits. ... May this Lire la suite...

 
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    schema:reviewBody ""The problem of ocean acoustic tomography is to infer from precise measurements of travel time, or other properties of acoustic propagation, the state of the ocean traversed by a sound field. Tomography takes advantage of two facts: that travel time and other measurable acoustic parameters are functions of temperature, water velocity, and other parameters of oceanographic interest and can be interpreted to provide information about the intervening ocean using inverse methods; that the ocean is virtually transparent to low-frequency sound, so that signals can be transmitted over distances of many thousands of kilometers. It is therefore possible to prepare a practical system of transmitters and receivers to interpret the behavior of the oceans." "This book gives a comprehensive presentation of the underlying oceanography and mathematics necessary to understand and develop such a system. It covers the forward and inverse tomography problems, as well as numerous models for data interpretation. Also included is an appendix outlining the history of tomographic techniques. The book should prove a valuable resource to oceanographers and climatologists, as well as applied mathematicians and engineers interested in applications of fluid-mechanics tools."--Jacket." ;
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