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Publications about 'Synthetic aperture sonar'

Thesis

  1. Hayden J. Callow. Signal Processing for Synthetic Aperture Sonar Image Enhancement. PhD thesis, University of Canterbury, 2003. Keyword(s): SAR Processing, Autofocus, Phase Gradient Autofocus, Stripmap, Stripmap PGA, Stripmap Phase Gradient Autofocus, SAS, Synthetic Aperture Sonar. [Abstract] [bibtex-entry]


  2. David W. Hawkins. Synthetic aperture imaging algorithms : with application to wide bandwidth sonar. PhD thesis, University of Canterbury. Electrical and Computer Engineering, 1996. Keyword(s): SAR Processing, Azimuth Focusing, Autofocus, Synthetic Aperture Sonar, SAS, Sonar, Phase Gradient Autofocus, Stripmap, range-Doppler Algorithm, Chirp Scaling Algorithm, CSA, omega-k, Wavenumber Domain Algorithm. [Abstract] [bibtex-entry]


Articles in journal or book chapters

  1. Benjamin Thomas, Alan Hunter, and Samantha Dugelay. Phase Wrap Error Correction by Random Sample Consensus With Application to Synthetic Aperture Sonar Micronavigation. IEEE Journal of Oceanic Engineering, pp 1-15, 2020. Keyword(s): SAR Processing, Time-Domain Back-Projection, TDBP, Delay effects, Synthetic aperture sonar, SAS, Estimation, Bandwidth, Synthetic aperture radar, Robustness, Phase unwrapping, synthetic aperture radar (SAR), synthetic aperture sonar (SAS), time delay estimation. [Abstract] [bibtex-entry]


  2. A. E. A. Blomberg, T. O. Saebo, Roy E. Hansen, R. B. Pedersen, and A. Austeng. Automatic Detection of Marine Gas Seeps Using an Interferometric Sidescan Sonar. IEEE Journal of Oceanic Engineering, 42(3):590-602, July 2017. Keyword(s): Synthetic Aperture Sonar, SAS, carbon capture and storage, interferometry, oceanographic techniques, seafloor phenomena, sediments, sonar, underwater sound, volcanology, North Sea, acoustic backscatter properties, acoustic seep detection, automatic seep detection method, autonomous underwater vehicle, biogenic methane, gravel, interferometric sidescan sonar, man-made constructions, marine gas seep automatic detection, marine gas seep detection method, marine gas seep monitoring method, multibeam surveying, ocean greenhouse gases, pipelines, sandy seafloor, seafloor seeps, seafloor types, sediments, seep acoustical property, seep spatial property, sidescan surveying, signal processing techniques, silt, subseafloor CO2 storage sites, volcano CO2 release, water gas-filled bubbles, well heads, Acoustics, Backscatter, Damping, Monitoring, Resonant frequency, Sonar detection, Automatic leakage detection, carbon capture and storage (CCS) monitoring, coherence, gas seep detection, interferometric sonar, sidescan sonar. [Abstract] [bibtex-entry]


  3. J. I. Buskenes, Roy E. Hansen, and A. Austeng. Low-Complexity Adaptive Sonar Imaging. IEEE Journal of Oceanic Engineering, 42(1):87-96, January 2017. Keyword(s): Synthetic Aperture Sonar, SAS, Sonar, array signal processing, interference suppression, sonar imaging, DAS beamformer, Hamming window function, Kaiser window, Kongsberg Maritime HISAS1030 sonar, LCA beamformer, delay-and-sum beamformer, gain -3 dB, interference minimization, low-complexity adaptive sonar imaging, minimum variance distortionless response, parallel hardware, rectangular window function, robust MVDR implementation, spatial statistics, Array signal processing, Arrays, Covariance matrices, Image resolution, Imaging, Robustness, Sonar, Active, LCA, MVDR, active filters, adaptive beamforming, adaptive filters, beamforming, complexity, computational complexity, phased arrays, sonar, spatial filters. [Abstract] [bibtex-entry]


  4. S. A. V. Synnes, A. J. Hunter, Roy E. Hansen, T. O. Saebo, H. J. Callow, R. van Vossen, and A. Austeng. Wideband Synthetic Aperture Sonar Backprojection With Maximization of Wave Number Domain Support. IEEE Journal of Oceanic Engineering, 42(4):880-891, October 2017. Keyword(s): Synthetic Aperture Sonar, SAS, image filtering, image resolution, optimisation, sensor arrays, sonar imaging, synthetic aperture sonar, time-domain analysis, BP, SAS arrays, SAS image formation algorithms, TDBP access data, WD filtering, aspect-dependent scattering, data degradation, frequency-dependent scattering, generic SAS design, sensor data quality, spatial domain quality metrics, time domain backprojection access data, wave number domain counterpart, wave number domain support maximization, wideband SAS systems, wideband synthetic aperture sonar backprojection, widebeam synthetic aperture sonar backprojection, Image resolution, Imaging, Performance evaluation, Scattering, Sonar applications, Synthetic aperture sonar, Wideband, Along-track ambiguity, backprojection (BP) algorithm, grating lobes, synthetic aperture sonar (SAS), wideband sonar. [Abstract] [bibtex-entry]


  5. T. M. Marston and J. L. Kennedy. Volumetric Acoustic Imaging via Circular Multipass Aperture Synthesis. IEEE_J_OE, 41(4):852-867, October 2016. Keyword(s): autonomous underwater vehicles, compressed sensing, matrix algebra, sonar, synthetic aperture radar, AUV, CSAS, analogous synthetic aperture radar tomography, autonomous underwater vehicle, compressive-sensing-based approach, data-driven technique, high-resolution volumetric images, joint sparsity assumption, multidimensional array, multipass circular synthetic aperture sonar, sensing matrices, standard joint sparse solving algorithm, volumetric acoustic imaging, Compressed sensing, Synthetic aperture radar, Synthetic aperture sonar, Tomography, Underwater vehicles, Compressive sensing, multipass sonar, synthetic aperture sonar (SAS), tomography, volumetric imaging. [bibtex-entry]


  6. Timothy M. Marston and Jermaine L. Kennedy. Volumetric Acoustic Imaging via Circular Multipass Aperture Synthesis. IEEE Journal of Oceanic Engineering, PP(99):1-16, 2016. Keyword(s): SAR Processing, SAR Tomography, SAS Tomography, Synthetic Aperture Sonar, SAS, Synthetic Aperture Radar, Circular SAR, Circular SAS, Apertures, Arrays, Navigation, Synthetic aperture radar, Synthetic aperture sonar, Tomography, Compressive sensing, multipass sonar, synthetic aperture sonar (SAS), tomography, volumetric imaging. [Abstract] [bibtex-entry]


  7. T. G. Michael, B. Marchand, J. D. Tucker, T. M. Marston, D. D. Sternlicht, and M. R. Azimi-Sadjadi. Image-Based Automated Change Detection for Synthetic Aperture Sonar by Multistage Coregistration and Canonical Correlation Analysis. IEEE_J_OE, 41(3):592-612, July 2016. Keyword(s): backscatter, image registration, sonar imaging, synthetic aperture sonar, transforms, backscattered signals, canonical correlation analysis, image-based automated change detection, multistage coregistration, scale-invariant feature transform algorithm, scene coherence, synthetic aperture sonar, Change detection algorithms, Coherence, Correlation, Navigation, Surges, Synthetic aperture sonar, Automated change detection, canonical correlation analysis (CCA), coherent change detection, coregistration, synthetic aperture sonar (SAS). [bibtex-entry]


  8. Roy E. Hansen, A. P. Lyons, T. O. S�b�, H. J. Callow, and D. A. Cook. The Effect of Internal Wave-Related Features on Synthetic Aperture Sonar. IEEE Journal of Oceanic Engineering, 40(3):621-631, July 2015. Keyword(s): Synthetic Aperture Sonar, SAS, autonomous underwater vehicles, bathymetry, oceanographic techniques, sonar imaging, synthetic aperture sonar, (AUV), CMRE, Centre for Maritime Research and Experimentation, Elba Island Italy, FFI, HUGIN autonomous underwater vehicle, Kjeller Norway, La Spezia Italy, NATO research vessel, Norwegian Defence Research Establishment, RV, SAS bathymetry, SAS imaging, acoustical ray model, bolus, interferometric synthetic aperture sonar, internal wave-related feature effect, moving target analysis, multiaperture processing, multilook processing, repeat pass imaging, seabed topography, sound-speed structure, water column, Geometry, Imaging, Interferometry, Shape, Surfaces, Synthetic aperture sonar, Internal waves, refraction effects, synthetic aperture sonar. [Abstract] [bibtex-entry]


  9. K. Landmark, A. H. Schistad Solberg, F. Albregtsen, A. Austeng, and Roy E. Hansen. A Radon-Transform-Based Image Noise Filter With Applications to Multibeam Bathymetry. IEEE Transactions on Geoscience and Remote Sensing, 53(11):6252-6273, November 2015. Keyword(s): Synthetic Aperture Sonar, SAS, Radon transforms, bathymetry, geophysical image processing, image denoising, image restoration, radar imaging, remote sensing by radar, synthetic aperture radar, Chebyshev approximation, Laplacian point spread function, denoised image, fast discrete Radon transform, geomorphological type statistical classification, image transform, invariant terrain features, invertible edge detection operator, linear-image-transform-based algorithm, motion-induced errors, motion-induced noise, multibeam bathymetry, original image, processed test images, radon-transform-based image noise filter, remote sensing data, second noise signature, standard low-pass filters, synthetic aperture radar images, track line artifacts, Approximation algorithms, Image edge detection, Noise, Noise reduction, Presses, Radio frequency, Transforms, Discrete transforms, image denoising, image restoration, iterative methods, remote sensing, sonar, terrain mapping. [Abstract] [bibtex-entry]


  10. Timothy M. Marston and Daniel S. Plotnick. Semiparametric Statistical Stripmap Synthetic Aperture Autofocusing. IEEE Transactions on Geoscience and Remote Sensing, 53(4):2086-2095, April 2015. Keyword(s): SAR Processing, Autofocus, Motion Compensation, MoComp, geophysical image processing, remote sensing by radar, synthetic aperture radar, synthetic aperture sonar, SAR literature, artificially injected crabbing error, artificially injected sway error, corrupting phase function, cost function gradient, metric-maximizing solutions, semiparametric statistical stripmap synthetic aperture autofocusing, spotlight-mode SAR applications, stripmap error model, stripmap gradient expression, stripmap imagery, synthetic aperture sonar literature, to statistical quality metric, unmanned-underwater-vehicle-mounted sonar system, widebeam wideband rail-based system, Apertures, Arrays, Computational modeling, Focusing, Measurement, Synthetic aperture sonar, Synthetic aperture sonar (SAS) radar autofocus stripmap. [Abstract] [bibtex-entry]


  11. K. Landmark, A. H. Schistad Solberg, A. Austeng, and Roy E. Hansen. Bayesian Seabed Classification Using Angle-Dependent Backscatter Data From Multibeam Echo Sounders. IEEE Journal of Oceanic Engineering, 39(4):724-739, October 2014. Keyword(s): Synthetic Aperture Sonar, SAS, Bayes methods, Gaussian processes, acoustic wave scattering, approximation theory, backscatter, oceanographic techniques, pattern classification, piecewise constant techniques, sonar, statistical analysis, Bayesian seabed classification, Gaussian statistical model, North Sea data set, acoustical seabed classification, across-track spatial resolution, angle-dependent backscatter data, intrinsic scattering strength statistics, mapping seabed sediment, multibeam echo sounder, multibeam sonar data processing, piecewise constant function, piecewise function approximation, seabed scattering strength, spatial averaging, standard Bayesian theory, Bayes methods, Classification algorithms, Remote sensing, Sea floor, Sediments, Sonar, Underwater acoustics, Bayesian methods, classification algorithms, remote sensing, seafloor, sediments, sonar. [Abstract] [bibtex-entry]


  12. A. E. Albright Blomberg, A. Austeng, Roy E. Hansen, and S. A. V. Synnes. Improving Sonar Performance in Shallow Water Using Adaptive Beamforming. IEEE Journal of Oceanic Engineering, 38(2):297-307, April 2013. Keyword(s): Synthetic Aperture Sonar, SAS, adaptive signal processing, array signal processing, interference suppression, optimisation, sonar imaging, Hanning window, LCA beamformer, MVDR beamformer, SNR, adaptive beamforming, adaptive minimum variance distortionless response beamformer, bottom-imaging sonars, dense receiver array, four-element receivers, low complexity adaptive beamformer, low sidelobe levels, multipath interference avoidance, multipath propagation, narrow mainlobe width, optimization criteria, second-order multipaths, shallow-water environments, sidelobe suppression, signal-to-noise ratio, sonar performance, spatial smoothing, vertical array, Array signal processing, Arrays, Receivers, Scattering, Sea surface, Signal to noise ratio, Sonar, Adaptive beamforming, multipath reduction, shallow-water imaging, sonar. [Abstract] [bibtex-entry]


  13. A. E. A. Blomberg, C. I. C. Nilsen, A. Austeng, and Roy E. Hansen. Adaptive Sonar Imaging Using Aperture Coherence. IEEE Journal of Oceanic Engineering, 38(1):98-108, January 2013. Keyword(s): Synthetic Aperture Sonar, SAS, array signal processing, sonar imaging, speckle, DAS beamformer, HISAS 1030 sonar, SNR scenarios, SWiP, Wiener postfilter, adaptive sonar imaging, aperture-coherence-based methods, backscattered energy, coherence factor, computationally efficient adaptive imaging methods, delay-and-sum beamformer, image resolution, medical ultrasound imaging, noise suppression capabilities, receiver array, signal-to-noise ratio, speckle environment, Apertures, Arrays, Coherence, Imaging, Noise, Sonar, Speckle, Adaptive beamforming, Wiener postfilter, aperture coherence, array signal gain, coherence factor (CF), sonar imaging. [Abstract] [bibtex-entry]


  14. F. Prieur and Roy E. Hansen. Theoretical Improvements When Using the Second Harmonic Signal in Acoustic Doppler Current Profilers. IEEE Journal of Oceanic Engineering, 38(2):275-284, April 2013. Keyword(s): Synthetic Aperture Sonar, SAS, Doppler shift, acoustic pulses, acoustic signal processing, acoustic wave velocity, autonomous underwater vehicles, harmonic generation, signal generators, underwater sound, Doppler frequency shift, Doppler log transmission, acoustic Doppler current profilers, floating particles, frequency 153.6 kHz, geometrical properties, geometry, harmonic signal generation, mainlobe-to-sidelobe ratio, perturbations, power 250 W, pulse transmission, sea bottom, second harmonic signal, size 400 m, velocity estimation error, velocity logs, vessel relative, water currents, Acoustic beams, Doppler shift, Estimation, Harmonic analysis, Transducers, Vectors, Current profiler, Doppler, harmonic, nonlinearity. [Abstract] [bibtex-entry]


  15. T. O. Saebo, S. A. V. Synnes, and Roy E. Hansen. Wideband Interferometry in Synthetic Aperture Sonar. IEEE Transactions on Geoscience and Remote Sensing, 51(8):4450-4459, August 2013. Keyword(s): Synthetic Aperture Sonar, SAS, autonomous aerial vehicles, geophysical image processing, image resolution, oceanographic equipment, oceanographic techniques, radar imaging, radar interferometry, remote sensing by radar, synthetic aperture radar, Goldstein branch cut phase unwrapping algorithm, HISAS wideband interferometric SAS, HUGIN autonomous underwater vehicle, SAS interferometry, absolute phase difference, advanced phase unwrapping techniques, complex cross correlation technique, direct phase difference estimation, final phase estimate, high resolution images, interferometric data processing, misregistrated areas, multiband split spectrum technique, multichromatic approach, narrowband interferometry processing, phase ambiguities, seafloor, synthetic aperture sonar interferometry, topographic maps, wideband interferometry techniques, Delay effects, Interferometry, Maximum likelihood estimation, Synthetic aperture sonar, Wideband, Complex cross correlation, multichromatic analysis, split spectrum algorithm, synthetic aperture radar (SAR), synthetic aperture sonar (SAS), wideband interferometry. [Abstract] [bibtex-entry]


  16. A. E. A. Blomberg, A. Austeng, and Roy E. Hansen. Adaptive Beamforming Applied to a Cylindrical Sonar Array Using an Interpolated Array Transformation. IEEE Journal of Oceanic Engineering, 37(1):25-34, January 2012. Keyword(s): Synthetic Aperture Sonar, SAS, array signal processing, interpolation, sonar arrays, sonar signal processing, SX90 fish finding sonar, adaptive beamforming, adaptive minimum variance, amplitude estimation, azimuth resolution, cylindrical sonar array, interference rejection, interpolated array transformation, phase estimation, virtual linear array, Array signal processing, Arrays, Covariance matrix, Signal resolution, Sonar applications, Vectors, Adaptive signal processing, array signal processing, beam steering, imaging, sonar, spatial resolution. [Abstract] [bibtex-entry]


  17. Roy E. Hansen, H. J. Callow, T. O. Sabo, and S. A. V. Synnes. Challenges in Seafloor Imaging and Mapping With Synthetic Aperture Sonar. IEEE Transactions on Geoscience and Remote Sensing, 49(10):3677-3687, October 2011. Keyword(s): Synthetic Aperture Sonar, SAS, bathymetry, oceanographic equipment, radar imaging, radar interferometry, seafloor phenomena, synthetic aperture sonar, underwater sound, HISAS 1030 interferometric SAS, acoustic signals, aided inertial navigation, bathymetry, centimeter resolution, coherence, grating lobes, image focusing, nonstraight tracks, ocean environment, real aperture interferometry, sea surface, seafloor imaging, seafloor mapping, shallow waters, sonar positioning, sound velocity, synthetic aperture sonar, vehicle instability, Apertures, Image resolution, Imaging, Sonar navigation, Synthetic aperture sonar, Vehicles, Interferometry, multiple reflections, navigation, nonlinear tracks, seafloor imaging, sound velocity errors, synthetic aperture radar (SAR), synthetic aperture sonar (SAS), topography errors. [Abstract] [bibtex-entry]


  18. J. Groen, Roy E. Hansen, H. J. Callow, J. C. Sabel, and T. O. Sabo. Shadow Enhancement in Synthetic Aperture Sonar Using Fixed Focusing. IEEE Journal of Oceanic Engineering, 34(3):269-284, July 2009. Keyword(s): Synthetic Aperture Sonar, SAS, image enhancement, sonar imaging, sonar target recognition, synthetic aperture sonar, HUGIN autonomous underwater vehicle, fixed focus shadow enhancement, shadow clarity, synthetic aperture sonar imaging, target recognition, widebeam synthetic aperture imaging systems, Acoustics, beamforming, focusing, imaging, shadow, synthetic aperture sonar (SAS). [Abstract] [bibtex-entry]


  19. T. O. Saebo, Roy E. Hansen, and A. Hanssen. Relative Height Estimation by Cross-Correlating Ground-Range Synthetic Aperture Sonar Images. IEEE Journal of Oceanic Engineering, 32(4):971-982, October 2007. Keyword(s): Synthetic Aperture Sonar, SAS, oceanographic techniques, seafloor phenomena, sonar imaging, synthetic aperture sonar, Elba Island, InSAS-2000 experiment, Italy, SAS processing, along-track resolution, azimuth resolution, broadband signals, coherent frequency-dependent scattering, correction technique, cross correlations, geometrical decorrelation effect, image acquisition, mathematical model, moving platform, seafloor relative height, signal-to-noise ratio, sonar images beamforming, synthetic aperture sonar imaging, time-delay estimates, vertically displaced receivers, Azimuth, Coherence, Decorrelation, Frequency estimation, Mathematical model, Scattering, Sea floor, Signal resolution, Signal to noise ratio, Synthetic aperture sonar, Bathymetry, coherence, cross correlation, height estimation, interferometry, synthetic aperture sonar (SAS), time-delay estimation. [Abstract] [bibtex-entry]


  20. Andrea Bellettini and M. A. Pinto. Theoretical accuracy of synthetic aperture sonar micronavigation using a displaced phase-center antenna. IEEE Journal of Oceanic Engineering, 27(4):780-789, October 2002. Keyword(s): Synthetic Aperture Sonar, SAS, navigation, synthetic aperture sonar, 118 to 182 kHz, Cramer-Rao lower bound, array gain, beampattern specification, displaced phase-center antenna, DPCA, ping-to-ping cross-track displacement, sway, synthetic aperture sonar micronavigation, yaw, Antenna theory, Aperture antennas, Backscatter, Computational modeling, Counting circuits, Helium, Predictive models, Principal component analysis, Sonar navigation, Synthetic aperture sonar. [Abstract] [bibtex-entry]


Conference articles

  1. U. Herter, H. Schmaljohann, and T. Fickenscher. Autofocus performance on multi channel SAS images in the presence of overlapping phase centers. In OCEANS 2016 MTS/IEEE Monterey, pages 1-6, September 2016. Keyword(s): geophysical image processing, image restoration, optical focusing, sonar imaging, synthetic aperture sonar, DPCA, RPC, SPGA focusing, autofocus performance, blurred images, data driven micronavigation, displaced phase center antenna, echo signals, multichannel SAS images, navigation data, overlapping phase centers, raw echo data, redundant phase centers, residual phase errors, side lobe levels, strip-map phase gradient autofocus, synthetic aperture images, synthetic aperture sonar, Apertures, Approximation algorithms, Sonar navigation, Synthetic aperture sonar, Transmitters, aperture sonar, autofocus, multi-channel, strip-map. [Abstract] [bibtex-entry]


  2. T. R. Clem, D. D. Sternlicht, J. E. Fernandez, J. L. Prater, R. Holtzapple, R. P. Gibson, J. P. Klose, and T. M. Marston. Demonstration of advanced sensors for underwater unexploded ordnance (UXO) detection. In Proc. Oceans, pages 1-4, October 2012. Keyword(s): inspection, oceanographic equipment, sensors, Office of Naval Research Small Synthetic Aperture MineHunter, REMUS BMI system, REMUS buried mine identification system, SSAM, UXO detection, UXO removal, advanced sensor demonstration, advanced sensors, clutter rejection, commercial-off-the-shelf sensors, diver inspections, hydronalix surfsense microUSV, hydronalix surfsense microunmanned surface vessel, man-made objects, military test ranges, seabed unexploded ordnance, subsurface UXO sized objects, underwater unexploded ordnance detection, Clutter, Inspection, Magnetic resonance imaging, Magnetoacoustic effects, Magnetometers, Sensors, Synthetic aperture sonar. [bibtex-entry]


  3. T. Marston. A correlation-based autofocus algorithm for coherent circular synthetic aperture sonar. In Proc. EUSAR 2012; 9th European Conf. Synthetic Aperture Radar, pages 66-69, April 2012. Keyword(s): Apertures, Correlation, Fourier transforms, Manganese, Navigation, Synthetic aperture sonar. [bibtex-entry]


  4. T. M. Marston, J. L. Kennedy, and P. L. Marston. Coherent and semi-coherent processing of limited-aperture circular synthetic aperture (CSAS) data. In Proc. OCEANS'11 MTS/IEEE KONA, pages 1-6, September 2011. Keyword(s): backscatter, radar imaging, synthetic aperture sonar, 360 degree scattering information, acoustic targets, backscattered echoes, circular synthetic aperture sonar, destructive interference, image clarity, image masking process, imaging algorithm, limited-aperture circular synthetic aperture data, remote environmental monitoring units, semi-coherent processing, sonar platform, time-domain information, unexploded ordnance objects, unmanned underwater vehicle, Acoustics, Aluminum, Apertures, Image reconstruction, Imaging, Synthetic aperture sonar, Tires, circular synthetic aperture sonar, classification, semicoherent imaging, subaperture, unexploded ordinance. [bibtex-entry]


  5. J. L. Prater and T. M. Marston. Partial synthetic aperture beamformer. In Proc. OCEANS'11 MTS/IEEE KONA, pages 1-5, September 2011. Keyword(s): array signal processing, autonomous underwater vehicles, image resolution, sonar imaging, synthetic aperture sonar, AUV technology, SAS, autonomous underwater vehicle, image resolution, nonlinear trajectories, partial synthetic aperture beamformer, synthetic aperture sonar, Apertures, Array signal processing, Image resolution, Synthetic aperture sonar, Trajectory, Vehicles, autonomatic target recognition, beamforming, synthetic aperture sonar. [bibtex-entry]


  6. G. C. Eastland, T. M. Marston, and P. L. Marston. Evolution of acoustic feature timing and imaging for different cylinder exposures and applications of reversible SAS filtering. In Proc. OCEANS 2010 MTS/IEEE SEATTLE, pages 1-4, September 2010. Keyword(s): acoustic wave scattering, filtering theory, sonar imaging, synthetic aperture sonar, acoustic feature imaging, acoustic feature timing, acoustic paths, acoustic scattering, cylinder exposures, reversible SAS filtering, synthetic aperture sonar, timing slope, Geometry, Imaging, Receivers, Scattering, Synthetic aperture sonar, Timing, Transducers. [bibtex-entry]


  7. A. L. Espana, K. L. Williams, S. G. Kargl, M. Zampolli, T. M. Marston, and P. L. Marston. Measurements and modeling of the acoustic scattering from an aluminum pipe in the free field and in contact with a sand sediment. In Proc. OCEANS 2010 MTS/IEEE SEATTLE, pages 1-5, September 2010. Keyword(s): acoustic wave scattering, finite element analysis, sediments, sonar imaging, spatial filters, synthetic aperture sonar, FE calculation, SAS images, acoustic scattering measurement, acoustic scattering modeling, aluminum pipe, elastic contribution, elastic response, finite element model, flattened sand sediment, free field, fresh water pond, monostatic scattering, spatial filter boundary, specular response, synthetic aperture sonar techniques, target strength, Aluminum, Arrays, Finite element methods, Rails, Scattering, Sediments, Synthetic aperture sonar. [bibtex-entry]


  8. T. M. Marston, P. L. Marston, and K. L. Williams. Scattering resonances, filtering with reversible SAS processing, and applications of quantitative ray theory. In Proc. OCEANS 2010 MTS/IEEE SEATTLE, pages 1-9, September 2010. Keyword(s): acoustic wave scattering, deconvolution, elasticity, feature extraction, geophysical image processing, image classification, sonar imaging, spatial filters, synthetic aperture sonar, SAS image processing, acoustic spectral content, deconvolution, elasticity, hybrid processing technique, image classification, quantitative ray theory, scattering resonance, spatial filter, spectral feature, structural resonance, synthetic aperture sonar, Aluminum, Approximation methods, Backscatter, Feature extraction, Scattering, Synthetic aperture sonar. [bibtex-entry]


  9. G. Shippey, S. Banks, and J. Pihl. SAS image reconstruction using Fast Polar Back Projection: comparisons with Fast Factored Back Projection and Fourier-domain imaging. In Oceans 2005 - Europe, volume 1, pages 96-101, June 2005. Keyword(s): SAR Processing, Time-Domain Back-Projection, TDBP, Fast-Factorized Back-Projection, FFBP, Fast Polar Back-Projection, FPBP, fast Fourier transforms, image reconstruction, radar imaging, sonar imaging, synthetic aperture radar, synthetic aperture sonar FFBP, FPBP, Fast Factored Back Projection, Fast Polar Back Projection, Fourier-domain imaging, SAS image reconstruction, Synthetic Aperture Radar, Synthetic Aperture Sonar, autopositioning purposes, azimuth sidelobe level, computation time reduction, intermediate physical aperture images, multielement sonar arrays, nonlinear platform trajectories, preset approximation error, review, standard FFT-based method, time-domain methods, ultra-wideband airborne SAR, wide bandwidths, wide swaths. [Abstract] [bibtex-entry]


  10. H.J. Callow, M.P. Hayes, and P.T. Gough. Autofocus of stripmap SAS data using the range-variant SPGA algorithm. In OCEANS 2003 Proceedings, volume 5, pages 2422-2426, September 2003. Keyword(s): SAR Processing, Autofocus, Phase Curvature Autofocus, Phase Gradient Autofocus, PGA, SPGA, Stripmap Phase Gradient Algorithm, Synthetic Aperture Sonar, SAS. [bibtex-entry]


  11. H.J. Callow, M.P. Hayes, and P.T. Gough. Stripmap phase gradient autofocus. In OCEANS 2003. Proceedings, volume 5, pages 2414-2421, September 2003. Keyword(s): SAR Processing, Autofocus, Phase Curvature Autofocus, Phase Gradient Autofocus, PGA, SPGA, Stripmap Phase Gradient Algorithm, Synthetic Aperture Sonar, SAS. [Abstract] [bibtex-entry]


  12. T.J. Sutton, H.D. Griffiths, A.P. Hetet, Y. Perrot, and S.A. Chapman. Experimental validation of autofocus algorithms for high-resolution imaging of the seabed using synthetic aperture sonar. In Radar, Sonar and Navigation, IEE Proceedings -, volume 150, pages 78-83, April 2003. [bibtex-entry]


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Last modified: Mon Feb 1 16:41:24 2021
Author: Othmar Frey, Earth Observation and Remote Sensing, Institute of Environmental Engineering, Swiss Federal Institute of Technology - ETH Zurich .


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