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CONTENTS

PREFACE

ACKNOWLEDGMENTS

LIST OF FIGURES

LIST OF TABLES

LIST OF ABBREVIATIONS AND ACRONYMS

1 INTRODUCTION
1.1 Book overview

2 ACOUSTIC SIGNALS AND DATA ACQUISITION
2.1 Sonar mapping systems
2.2 Acoustic theory; basics
2.2.1 Acoustic waves
2.2.2 Acoustic propagation
2.2.3 Acoustic scattering; theory
2.3 Signal generation and data acquisition
2.3.1 Acoustic projectors
2.3.2 Hydrophones and arrays
2.3.3 Signal conditioning
2.4 New concepts; new tools
2.4.1 Higher frequencies; higher resolutions
2.4.2 Multistatic sonars
2.4.3 Synthetic aperture sonar
2.4.4 Parametric sidescan sonar
2.4.5 Biomimetics
2.5 Sonar performance
2.6 Conclusion
2.7 Further reading

3 IMAGERY AND BATHYMETRY
3.1 Processing acoustic measurements
3.2 Sidescan sonar imagery
3.2.1 Slant range and ground range
3.2.2 Backscatter strength
3.3 Adding bathymetry
3.3.1 Sidescan bathymetry and interferometry
3.3.2 Multibeam bathymetry
3.4 Merging imagery and bathymetry
3.5 Conclusion
3.6 Further reading

4 SIDESCAN SONAR DATA PROCESSING
4.1 Backscatter profiles
4.2 Navigation and attitude
4.2.1 Navigation of surface vehicles
4.2.2 Navigation of underwater vehicles
4.2.3 Attitude information
4.3 Pre-processing
4.3.1 Definitions
4.3.2 Data formats
4.3.3 Navigation pre-processing
4.3.4 Attitude pre-processing
4.4 Radiometric corrections
4.4.1 Requantization
4.4.2 Across-track corrections
4.4.3 Along-track corrections
4.5 Geometric corrections
4.5.1 Slant-range correction
4.5.2 Anamorphosis
4.6 Bathymetry processing
4.7 Map production
4.7.1 Mosaicking/Stenciling
4.7.2 Interpolation/Rubbersheeting
4.8 Post-processing
4.8.1 Image statistics
4.8.2 Histogram manipulations
4.8.3 Speckle removal
4.8.4 Sea surface reflection removal
4.9 Operational examples
4.10 Interpretation of sonar images
4.11 Conclusion
4.12 Further reading

5 SPREADING AND SUBDUCTION
5.1 Plate tectonics and the seafloor
5.2 Tectonic structures
5.3 Volcanic structures
5.4 Sedimented areas
5.5 Hydrothermal structures
5.6 Seafloor structures associated with subduction
5.7 Examples of regional imagery
5.8 Conclusions
5.9 Further reading

6 ABYSSAL BASINS AND THE POLAR SEAS
6.1 Introduction
6.2 Using ancillary information
6.2.1 Other acoustic tools
6.2.2 Non-acoustic remote sensing
6.2.3 Direct sampling
6.3 Abyssal basins
6.3.1 Geological background
6.3.2 Sediment input
6.3.3 Relict structures
6.3.4 Sedimentary structures
6.4 Polar seas
6.4.1 General setting
6.4.2 Ice-related structures
6.4.3 Other typical structures
6.5 Regional imagery: the Hawaiian Abyssal Plain
6.6 Conclusion
6.7 Further reading

7 CONTINENTAL MARGINS
7.1 Introduction
7.2 Sedimentary structures
7.2.1 Sediment deposition and erosion
7.2.2 Sediment transport - submarine canyons
7.2.3 Mass-wasting, slides, and flows
7.2.4 Sediment redistribution
7.3 Tectonic and volcanic structures
7.4 Other structures
7.4.1 Biological activity - past and present
7.4.2 Fluid and gas seepage structures
7.4.3 Brine pools
7.5 Regional imagery
7.5.1 The Blake Escarpment, North Atlantic
7.5.2 The Almeria Canyon and Almeria Margin, Mediterranean Sea
7.6 Conclusions
7.7 Further reading

8 SHALLOW-WATER ENVIRONMENTS
8.1 Introduction
8.2 Sedimentary structures
8.3 Rock outcrops
8.4 Biological structures
8.5 Regional imagery
8.6 Conclusion
8.7 Further reading

9 MAN-MADE STRUCTURES
9.1 Introduction
9.2 Planned structures
9.2.1 Pipelines - cables
9.2.2 Dump sites
9.2.3 Harbor areas
9.2.4 Seabed resources and their exploitation
9.3 Accidental structures
9.3.1 Fishing activities
9.3.2 Shipwrecks
9.3.3 Pollution
9.4 Seabed waste and military mines
9.4.1 Seabed waste
9.4.2 Military mines
9.5 Sonars and underwater archaeology
9.6 Conclusion
9.7 Further reading

10 ANOMALIES AND ARTEFACTS
10.1 Introduction
10.2 Propagation artefacts
10.2.1 Water column variations
10.2.2 Beam spreading
10.2.3 Acoustic noise
10.3 Physical (scattering) artefacts
10.3.1 Sub-surface reflections
10.3.2 Multipath scattering
10.3.3 Unexpected features
10.4 Processing artefacts
10.4.1 Radiometric artefacts
10.4.2 Geometric artefacts
10.4.3 Slant-range correction - layover
10.4.4 Identifying the origin of artefacts
10.5 Interpretation of artefacts
10.5.1 Output/display artefacts
10.5.2 Unexpected features
10.6 Conclusion
10.7 Further reading

11 COMPUTER-ASSISTED INTERPRETATION
11.1 Introduction
11.2 Traditional techniques
11.2.1 Image enhancement
11.2.2 Contour-oriented analyses
11.2.3 Texture-oriented analyses
11.3 New techniques
11.3.1 Data fusion and Geographic Information Systems,
11.3.2 Neural networks and genetic algorithms
11.3.3 Image compression
11.4 Seabed characterization
11.4.1 Goals, purposes, limits
11.4.2 Applications
11.5 Artificial Intelligence - expert systems
11.6 Conclusion
11.7 Further reading

12 CONCLUSION

REFERENCES

INDEX




Pär Ahlgren
Pär Ahlgren 2011-06-24 23:08:20
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Huvudinlägg Recension "SIDESCAN SONAR" Pär Ahlgren 2011-06-24 22:58
svara Komplett innehållsförteckningPär Ahlgren2011-06-24 23:08
svara Sv: Recension "SIDESCAN SONAR"Ulf Meyer2011-06-25 01:30

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