Impact of Littoral Environmental Variability of Acoustic Predictions and Sonar Performance

Front Matter....Pages i-xi
Front Matter....Pages 1-1
Acoustic Effects of Environmental Variability in the Swarm, Primer and Asiaex Experiments....Pages 3-10
Acoustic Intensity Variability in a Shallow Water Environment....Pages 11-18
Combination of Acoustics with High Resolution Oceanography....Pages 19-26
Effect of Hurricane Michael on the Underwater Acoustic Environment of the Scotian Shelf....Pages 27-34
High-Frequency Acoustic Propagation in the Presence of Oceanographic Variability....Pages 35-42
Instrumented Tow Cable Measurements of Temperature Variability of the Water Column....Pages 43-48
Mesoscale — Small Scale Oceanic Variability Effects on Underwater Acoustic Signal Propagation....Pages 49-54
Spatial Coherence of Signals Forward Scattered from the Sea Surface in the East China Sea....Pages 55-62
Variability in High Frequency Acoustic Backscattering in the Water Column....Pages 63-70
Front Matter....Pages 71-71
Intra- and Inter-Regional Geoacoustic Variability in the Littoral....Pages 73-82
Acoustic and In-Situ Techniques for Measuring the Spatial Variability of Seabed Geoacoustic Parameters in Littoral Environments....Pages 83-90
Measurements of Bottom Variability During Swat New Jersey Shelf Experiments....Pages 91-98
Mapping Seabed Variability Using Combined Echosounder and XBPs for Sonar Performance Prediction....Pages 99-106
Variability of Shear Wave Speed and Attenuation In Surficial Marine Sediments....Pages 107-114
 In-Situ Determination of the Variability of Seafloor Acoustic Properties: An Example from the Onr Geoclutter Area....Pages 115-122
Calculation of In Situ Acoustic Wave Properties in Marine Sediments....Pages 123-130
Sub-Bottom Variability Characterization Using Surface Acoustic Waves....Pages 131-138
The Influence of Noise and Coherence Fluctuations on a New Geo-Acoustic Inversion Technique....Pages 139-146
Estimating Shallow Water Bottom Geo-Acoustic Parameters Using Ambient Noise....Pages 147-154
Effect of Environmental Variability on Model-Based Signal Processing: Review of Experimental Results in the Mediterranean....Pages 155-162
Front Matter....Pages 71-71
Rapid Geoacoustic Characterization for Limiting Environmental Uncertainty for Sonar System Performance Prediction....Pages 163-170
Environmental Uncertainty in Acoustic Inversion....Pages 171-178
Measuring the Azimuthal Variability of Acoustic Backscatter from Littoral Seabeds....Pages 179-186
Backscatter from Elastic Ocean Bottoms: Using the Small Slope Model to Assess Acoustical Variability and Uncertainty....Pages 187-194
Spatial and Temporal Variability in Bottom Roughness: Implications to High Frequency Subcritical Penetration and Backscatter....Pages 195-202
Variability of Bottom Backscattering Strength in the 10–500 kHz Band At Shallow Grazing Angles....Pages 203-210
Predicting Scattered Envelope Statistics of Patchy Seafloors....Pages 211-218
The Effect of Seabed Backscattering Variability on the Probability of Detection and on The Performance of Seabed Classification Algorithms....Pages 219-226
Front Matter....Pages 227-227
Effects of Environmental Variability on Acoustic Propagation Loss in Shallow Water....Pages 229-236
Broadband Acoustic Signal Variability in Two “Typical“ Shallow-Water Regions....Pages 237-244
Variability, Coherence and Predictability of Shallow Water Acoustic Propagation in the Straits of Florida....Pages 245-254
Ambient Noise and Signal Uncertainties During the Summer Shelfbreak Primer Exercise....Pages 255-262
Variability Effects Due to Shallow Sediment Gas in Acoustic Propagation: A Case Study From the Malta Plateau....Pages 263-270
Acoustic Fluctuations and Their Harmonic Structure....Pages 271-278
Group and Phase Speed Analysis for Predicting and Mitigating the Effects of Fluctuations....Pages 279-286
High-Frequency Propagation for Acoustic Communications....Pages 287-294
Channel Impulse Response Fluctuations at 6 kHz in Shallow Water....Pages 295-302
High Resolution Analysis of Eigenray Gain Perturbations in Ultra-Shallow Water....Pages 303-310
Impacts of Flow Variability on Fixed Side-Looking 100 kHz Sonar Performance in a Shallow Channel....Pages 311-318
Correlation between Sonar Echoes and Sea Bottom Topography....Pages 319-326
Front Matter....Pages 327-327
Acoustic Scattering in Wave-Covered Shallow Water. The Coherent Field....Pages 329-336
Simulations of Temporal and Spatial Variability in Shallow Water Propagation....Pages 337-344
Assessing the Variability of Near-Boundary Surface and Volume Reverberation Using Physics-Based Scattering Models....Pages 345-352
Modeling Propagation and Reverberation Sensitivity to Oceanographic and Seabed Variability....Pages 353-360
Uncertainty in Reverberation Modelling and a Related Experiment....Pages 361-368
Statistics of the Waveguide Invariant Distribution in a Random Ocean....Pages 369-376
Effects of Environmental Variability on Focused Acoustic Fields....Pages 377-383
Effects of Sound Speed Fluctuations Due to Internal Waves in Shallow Water on Horizontal Wavenumber Estimation....Pages 385-392
Relative Influences of Various Environmental Factors on 50–1000 HZ Sound Propagation in Shelf and Slope Areas....Pages 393-400
Sub-Mesoscale Modeling of Environmental Variability in a Shelf-Slope Region and the Effect on Acoustic Fluctuations....Pages 401-408
Yellow Sea Internal Solitary Wave Variability....Pages 409-416
Four-Dimensional Data Assimilation for Coupled Physical-Acoustical Fields....Pages 417-424
Source Localization in A Highly Variable Shallow Water Environment: Results from Ascot-01....Pages 425-432
Experimental Testing of the Blind Ocean Acoustic Tomography Concept....Pages 433-440
Benchmarking Geoacoustic Inversion Methods for Range Dependent Waveguides....Pages 441-448
Adjoint-Assisted Inversion for Shallow Water Environment Parameters....Pages 449-456
Tidal Effects on MFP Via the Intimate96 Test....Pages 457-463
Multipath Effect on DPCA Micronavigation of a Synthetic Aperture Sonar....Pages 465-472
Sea Surface Simulator for Testing A Synthetic Aperture Sonar....Pages 473-480
Using A Faceted Rough Surface Environmental Model to Simulate Shallow-Water Sas Imagery....Pages 481-488
Front Matter....Pages 327-327
A Study of Ping-To-Ping Coherence of the Seabed Response....Pages 489-496
Variability of The Acoustic Response from Spherical Shells Buried in the Seabed by Model-Based Analysis of At-Sea Data....Pages 497-504
Front Matter....Pages 505-505
Erformance Bounds on the Detection and Localization in a Stochastic Ocean....Pages 507-514
Robust Adaptive Processing in Littoral Regions with Environmental Uncertainty....Pages 515-522
A Robust Model-Based Algorithm for Localizing Marine Mammal Transients....Pages 523-530
Assessment of the Impact of Uncertainty in Seabed Geoacoustic Parameters on Predicted Sonar Performance....Pages 531-538
Reverberation Envelope Statistics and Their Dependence on Sonar Beamwidth and Bandwidth....Pages 539-546
The Role of Nowcast and Forecast Input Parameters for Range Dependent Transmission Models....Pages 547-554
Are Current Environmental Databases Adequate for Sonar Predictions in Shallow Water?....Pages 555-562
Yellow Sea Acoustic Uncertainty Caused by Hydrographic Data Error....Pages 563-570
Detection of Sonar Induced Measurement Uncertainties in Environmental Sensing: A Case Study with the Toroidal Volume Search Sonar....Pages 571-577
Environmental Variability of the LBVDS Sea Tests....Pages 579-586
AREA: Adaptive Rapid Environmental Assessment....Pages 587-594
Environmentally Adaptive Sonar Control in a Tactical Setting....Pages 595-602
Transfer of Uncertainties Through Physical-Acoustical-Sonar End-to-End Systems: A Conceptual Basis....Pages 603-610
Sonar Performance Predictions Incorporating Environmental Variability....Pages 611-618
Back Matter....Pages 619-620