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Publications about 'Autofocus'

Books and proceedings

  1. Annelie Wyholt. SAR Image Focus Errors due to Incorrect Geometrical Positioning in Fast Factorized Back-Projection. Licentiatavhandling, Chalmers University of Technology, 2008. Keyword(s): SAR Processing, Autofocus, Time-Domain Back-Projection, TDBP, FFBP, SAR image processing, antenna path parameters, autofocus, fast factorized back-projection, radar imaging, synthetic aperture radar. [Abstract] [bibtex-entry]


  2. Ian G. Cumming and Frank H. Wong. Digital Processing of Synthetic Aperture Radar Data: Algorithms and Implementation. Artech House Inc., Boston, London, 2005. Keyword(s): SAR Processing, Range-Doppler Algorithm, Chirp Scaling Algorithm, Extended Chirp Scaling Algorithm, Range Migration Algorithm, omega-k, Wavenumber Domain Algorithm, SPECAN Algorithm, Comparison of Algorithms, Demodulation, Quadrature Demodulation, Hilbert Transform, Doppler Centroid Estimation, Doppler Ambiguity Resolver, DAR, Doppler Rate Estimation, Azimuth FM Rate, Autofocus Techniques, ScanSAR, Range Compression, Pulse Compression, Pulse Compression of Linear FM Signals, Linear FM Signals, Stolt Mapping, Quality Assessment, Quality Measures, Quality Metrics, PSLR, ISLR, Spaceborne SAR. [Abstract] [bibtex-entry]


  3. Charles V. Jakowatz, Daniel E. Wahl, Paul H. Eichel, Dennis C. Ghiglia, and Paul A. Thompson. Spotlight-Mode Synthetic Aperture Radar: A Signal Processing Approach. Norwell, MA: Kluwer Academic Publishers, 1996. Keyword(s): SAR Processing, Spotlight SAR, Spotlight mode, Autofocus, Phase Gradient Autofocus, PGA, Motion Compensation, MoComp, Airborne SAR, SAR Tomography, Tomography, InSAR, SAR Interferometry. [bibtex-entry]


  4. Walter G. Carrara, Ron S. Goodman, and Ronald M. Majewski. Spotlight Synthetic Aperture Radar: Signal Processing Algorithms. Artech House Inc., 1995. Keyword(s): SAR Processing, Spotlight SAR, Range Migration Algorithm, omega-k, Wavenumber Domain Algorithm, Chirp Scaling Algorithm, Polar Format Algorithm, Autofocus Techniques, Demodulation, Quadrature Demodulation, Hilbert Transform. [Abstract] [bibtex-entry]


  5. John C. Curlander and Robert N. McDonough. Synthetic Aperture Radar - Systems and Signal Processing. John Wiley & Sons, New York, 1991. Keyword(s): SAR Processing, Radar Equation, Matched Filter, Pulse Compression, Range Compression Processing, Azimuth Processing, range-Doppler, Clutterlock, Doppler Centroid Estimation, Doppler Centroid, Autofocus, Doppler Ambiguity Resolver, DAR, Doppler Rate Estimation, Azimuth FM Rate, Autofocus Techniques, Radiometric Calibration, Geometric Calibration, Rectangular Algorithm, Deramp Compression, Step Transform Processing, Polar Processing, Fourier Transform, Convolution, Interpolation, Satellite Orbits. [Abstract] [Comments] [bibtex-entry]


Thesis

  1. Craig L. Stringham. Developments in LFM-CW SAR for UAV Operation. PhD thesis, 2014. Keyword(s): SAR Proceessing, radar, SAR, UAV, GPU, Autofocus, SAR Autofocus, Backprojection, Time-Domain Back-Projection, Back-Projection, TDBP, fast-factorized back-projection, FFBP, LFM-CW, FMCW, MoComp, Motion Compensation, CSA, ECS, Chirp Scaling, Extended Chirp Scaling, FSA, Frequency Scaling Algorithm, Range-Doppler Algorithm, RDA, synthetic aperture radar, Brigham Young University, muSAR system, LFM-CW signal model, SAR image quality, aircraft, atmospheric turbulence, high-resolution synthetic aperture radar systems, linear frequency-modulated continuous-wave signal, motion compensation, motion correction algorithms, unmanned aerial vehicle, Airborne SAR, geophysical techniques. [Abstract] [bibtex-entry]


  2. 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]


  3. 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. Marco Manzoni, Dario Tagliaferri, Marco Rizzi, Stefano Tebaldini, Andrea Virgilio Monti Guarnieri, Claudio Maria Prati, Monica Nicoli, Ivan Russo, Sergi Duque, Christian Mazzucco, and Umberto Spagnolini. Motion Estimation and Compensation in Automotive MIMO SAR. IEEE Transactions on Intelligent Transportation Systems, 24(2):1756-1772, February 2023. Keyword(s): Synthetic aperture radar, Radar, Radar imaging, Radar polarimetry, Radar antennas, Automotive engineering, Navigation, SAR, automotive, MIMO, autofocus, motion compensation. [Abstract] [bibtex-entry]


  2. Y. Huang, F. Liu, Z. Chen, J. Li, and W. Hong. An Improved Map-Drift Algorithm for Unmanned Aerial Vehicle SAR Imaging. IEEE Geoscience and Remote Sensing Letters, pp 1-5, 2020. Keyword(s): Synthetic aperture radar, Unmanned aerial vehicles, Apertures, Azimuth, Trajectory, Electronics packaging, Doppler effect, Map-drift algorithm (MDA), motion compensation (MOCO), random sample consensus (RANSAC), unmanned aerial vehicle synthetic aperture radar (UAV SAR) imaging.. [Abstract] [bibtex-entry]


  3. D. Feng, D. An, X. Huang, and Y. Li. A Phase Calibration Method Based on Phase Gradient Autofocus for Airborne Holographic SAR Imaging. IEEE Geoscience and Remote Sensing Letters, pp 1-5, 2019. Keyword(s): Calibration, Imaging, Synthetic aperture radar, Electronics packaging, Image reconstruction, Radar polarimetry, Azimuth, Holographic synthetic aperture radar (HoloSAR) tomography, phase calibration, phase gradient autofocus (PGA), three-dimensional (3-D) imaging.. [Abstract] [bibtex-entry]


  4. Jan Torgrimsson, Patrick Dammert, Hans Hellsten, and Lars M. H. Ulander. SAR Processing Without a Motion Measurement System. IEEE Transactions on Geoscience and Remote Sensing, 57(2):1025-1039, February 2019. Keyword(s): SAR Processsing, Backprojection, Fast-factorized Back-projection, FFBP, Time-Domain Back-Projection, TDBP, Azimuth Focusing, Motion Compensation, MoComp, autofocus, geometric autofocus, radar imaging, synthetic aperture radar, synthetic aperture radar image, very high frequency band, base-2 fast factorized back-projection, track velocity error, CARABAS II system, ultrawideband data sets, innovative autofocus concept, subaperture pair, free geometry parameters, back-projection formulation, factorized geometrical autofocus, SAR processing, FGA algorithm, VHF-band, wavelength-resolution SAR image, FGA images, linear equidistant track, basic geometry model, Geometry, Synthetic aperture radar, Global Positioning System, Tracking, Apertures, Radar tracking, Autofocus, back-projection (BP), factorized geometrical autofocus (FGA), Synthetic Aperture Radar (SAR). [Abstract] [bibtex-entry]


  5. Ning Cao, Hyongki Lee, Evan Zaugg, Ramesh Shrestha, William E. Carter, Craig Glennie, Zhong Lu, and Hanwen Yu. Estimation of Residual Motion Errors in Airborne SAR Interferometry Based on Time-Domain Backprojection and Multisquint Techniques. IEEE Trans. Geosci. Remote Sens., 56(4):2397-2407, 2018. Keyword(s): SAR Processing, Interferometry, SAR Interferometry, InSAR, Differential SAR Interferometry, DInSAR, deformation monitoring, subsidence monitoring, Displacement, Focusing, Radar antennas, Synthetic aperture radar, Time-domain analysis, Trajectory, Backprojection (BP), SAR interferometry (InSAR), motion compensation (MoCo), residual motion error (RME), synthetic aperture radar (SAR). [Abstract] [bibtex-entry]


  6. Andrea Monti Guarnieri, Antonio Leanza, Andrea Recchia, Stefano Tebaldini, and Giovanna Venuti. Atmospheric Phase Screen in GEO-SAR: Estimation and Compensation. IEEE Transactions on Geoscience and Remote Sensing, 56(3):1668-1679, 2018. Keyword(s): SAR Processing, geosynchronous SAR, Synthetic Aperture Radar, Autofocus, Atmospheric Modelling, Apertures, Atmospheric modeling, Azimuth, Delays, Estimation, Orbits, Synthetic aperture radar, Meteorology, radar clutter, radar imaging, radar interferometry, synthetic aperture radar (SAR). [Abstract] [bibtex-entry]


  7. S. Zhou, L. Yang, L. Zhao, and G. Bi. Quasi-Polar-Based FFBP Algorithm for Miniature UAV SAR Imaging Without Navigational Data. IEEE Transactions on Geoscience and Remote Sensing, 55(12):7053-7065, December 2017. Keyword(s): autonomous aerial vehicles, image resolution, radar imaging, radar resolution, synthetic aperture radar, polar coordinate system, phase autofocusing, trajectory deviations, quasipolar grid image, data-driven motion compensation, back-projection algorithm, unmanned aerial vehicle synthetic aperture radar applications, time-domain algorithms, trajectory designation, flexible geometric configuration, navigational data, miniature UAV SAR imaging, FFBP algorithm, miniature UAV-SAR test bed, raw data experiments, high-resolution SAR applications, image focusing quality, analytical image spectrum, phase errors, quasipolar coordinate system, Synthetic aperture radar, Trajectory, Unmanned aerial vehicles, Signal processing algorithms, Algorithm design and analysis, Fast factorized back-projection (FFBP), motion compensation (MOCO), quasi-polar coordinate system, synthetic aperture radar (SAR), unmanned aerial vehicle (UAV). [Abstract] [bibtex-entry]


  8. Octavio Ponce, Pau Prats-Iraola, Rolf Scheiber, Andreas Reigber, and Alberto Moreira. First Airborne Demonstration of Holographic SAR Tomography With Fully Polarimetric Multicircular Acquisitions at L-Band. IEEE_J_GRS, 54(10):6170-6196, October 2016. Keyword(s): geophysical techniques, radar imaging, remote sensing by radar, synthetic aperture radar, 2-D synthetic aperture, Fully Polarimetric Multicircular Acquisitions, German Aerospace Center, Germany, HoloSAR tomogram polarimetric analysis, Kaufbeuren, L-Band, SAR systems, airborne F-SAR sensor, coherent imaging approach, complex reflectivity, compressive sensing, fast-factorized back-projection, forest backscattering analysis, full 3-D reconstructions, generalized likelihood ratio test, geometric acquisition, geoscience community, holographic SAR tomography, holographic techniques, impulse response function, incoherent imaging, individual circular trajectories, internal structure imaging, multicircular SAR acquisitions, polarimetric L-band HoloSAR survey, radar resolution capability function, scatterer polarimetric signature, semitransparent media, sidelobe power, spatial resolution, target 3-D IRF, tomographic techniques, volumetric backscattering, Apertures, Radar imaging, Spatial resolution, Synthetic aperture radar, Tomography, Circular synthetic aperture radar (CSAR), compressive sensing (CS), fast-factorized back-projection (FFBP), holographic sar tomography (HoloSAR), phase gradient autofocus (PGA), polarimetric synthetic aperture radar (PolSAR). [bibtex-entry]


  9. A. Recchia, Andrea Monti Guarnieri, Antonio Broquetas, and Antonio Leanza. Impact of Scene Decorrelation on Geosynchronous SAR Data Focusing. IEEE Transactions on Geoscience and Remote Sensing, 54(3):1635-1646, March 2016. Keyword(s): SAR Processing, SAR focusing, autofocus, atmospheric phase, atmospheric phase screen, APS, decorrelation, temporal decorrelation, geostationary, geosynchronous, radar clutter, radar resolution, synthetic aperture radar, Billingsley intrinsic clutter motion model, GEOSAR signal-to-clutter ratio, azimuth resolution, clutter energy, geosynchronous SAR data focusing, ground based radar experiment, power spectral density, scene decorrelation, two-way propagation losses, Azimuth, Clutter, Decorrelation, Focusing, Synthetic aperture radar, Thyristors, Focusing, Geosynchronous Synthetic Aperture Radar (GEOSAR), scene decorrelation, wind-blown clutter. [Abstract] [bibtex-entry]


  10. Jamal Saeedi and Karim Faez. A back-projection autofocus algorithm based on flight trajectory optimization for synthetic aperture radar imaging. Multidimensional Systems and Signal Processing, 27(2):411, April 2016. [Abstract] [bibtex-entry]


  11. Jan Torgrimsson, Patrik Dammert, Hans Hellsten, and Lars M. H. Ulander. An Efficient Solution to the Factorized Geometrical Autofocus Problem. IEEE Transactions on Geoscience and Remote Sensing, 54(8):4732-4748, August 2016. Keyword(s): SAR Processing, Autofocus, Fast-Factorized Back-Projection, FFBP, radar imaging, synthetic aperture radar, 6-D autofocus problem, FGA algorithm, adjustable geometry parameters, factorized back-projection formulation, factorized geometrical autofocus problem, geometrical variation, global autofocus solution, magnitude values, maximizing focus quality, peak-to-sidelobe ratio, point-like targets, synthetic-aperture-radar processing, ultrawideband CARABAS II data, Apertures, Geometry, Radar imaging, Radar tracking, Search problems, Synthetic aperture radar, Autofocus, back-projection, synthetic aperture radar (SAR). [Abstract] [bibtex-entry]


  12. 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]


  13. Zoran Sjanic and Frederik Gustafsson. Simultaneous navigation and synthetic aperture radar focusing. IEEE Transactions on Aerospace and Electronic Systems, 51(2):1253-1266, April 2015. Keyword(s): SAR Focusing, Autofocus, SLAM, Simultaneous Localization and Mapping, autonomous aerial vehicles, image resolution, radar imaging, radar resolution, radionavigation, synthetic aperture radar, synthetic aperture radar imaging equipment, image resolution, flying platform, image focusing, real-time SAR imaging, navigation system, trajectory joint estimation, unmanned aerial vehicle navigation, azimuth position error, Synthetic aperture radar, Trajectory, Radar imaging, Navigation, Entropy, Focusing. [Abstract] [bibtex-entry]


  14. Ze Yu, Zhou Li, and Shusen Wang. An Imaging Compensation Algorithm for Correcting the Impact of Tropospheric Delay on Spaceborne High-Resolution SAR. IEEE Transactions on Geoscience and Remote Sensing, 53(9):4825-4836, September 2015. Keyword(s): SAR Processing, SAR Focusing, Azimuth Focusing, Autofocus, Motion Compensation, atmospheric electromagnetic wave propagation, delays, geophysical image processing, image filtering, image resolution, radar cross-sections, radar imaging, remote sensing by radar, spaceborne radar, synthetic aperture radar, troposphere, imaging compensation algorithm, tropospheric delay, spaceborne high-resolution SAR, atmospheric refraction, electromagnetic signalpropagation speed, propagation path delay, geometrical straight-line path, spaceborne synthetic aperture radar, imaging filter, rectilinear propagation, residual phase, focusing quality, focusing performance, spaceborne SAR echo model, range delay coefficient, European Geostationary Navigation Overlay Service model, zenith delay, Niell mapping function, looking direction, range compensation, classical imaging, azimuth compensation, Delays, Synthetic aperture radar, Atmospheric modeling, Focusing, Data models, Real-time systems, High-resolution imaging, phase compensation, synthetic aperture radar (SAR), tropospheric delay, High-resolution imaging, phase compensation. [Abstract] [bibtex-entry]


  15. Y. Gao, W. Yu, Y. Liu, R. Wang, and C. Shi. Sharpness-Based Autofocusing for Stripmap SAR Using an Adaptive-Order Polynomial Model. IEEE Geoscience and Remote Sensing Letters, 11(6):1086-1090, June 2014. Keyword(s): conjugate gradient methods, maximum likelihood estimation, optical focusing, polynomials, radar imaging, search problems, synthetic aperture radar, closed-form expression, airborne SAR data experiment, modified adaptive-order searching strategy, conjugate gradient algorithm, polynomial expansion coefficient, sharpness function gradient, maximum-posterior estimation, SAR, stripmap-mode synthetic aperture radar image data, adaptive-order polynomial model, image sharpness-based autofocusing technique, Synthetic aperture radar, Polynomials, Accuracy, Estimation, Azimuth, Adaptation models, Optimization, Autofocus, conjugate gradient method (CGM), sharpness, synthetic aperture radar (SAR), Autofocus, conjugate gradient method (CGM), sharpness, synthetic aperture radar (SAR). [Abstract] [bibtex-entry]


  16. Octavio Ponce, Pau Prats-Iraola, Muriel Pinheiro, Marc Rodriguez-Cassola, Rolf Scheiber, Andreas Reigber, and Alberto Moreira. Fully Polarimetric High-Resolution 3-D Imaging With Circular SAR at L-Band. IEEE Trans. Geosci. Remote Sens., 52(6):3074-3090, June 2014. Keyword(s): SAR Processing, Circular SAR, Time-Domain Back-Projection, TDBP, MoComp, Motion Compensation, Bandwidth, Image resolution, Imaging, L-band, Synthetic aperture radar, Trajectory, Autofocus, circular synthetic aperture radar (CSAR), fast factorized back-projection, FFBP, graphics processing unit (GPU), high-resolution SAR, polarimetry, synthetic aperture radar (SAR), tomography, SAR Tomography. [Abstract] [bibtex-entry]


  17. Jan Torgrimsson, Patrik Dammert, Hans Hellsten, and Lars M. H. Ulander. Factorized Geometrical Autofocus for Synthetic Aperture Radar Processing. IEEE Trans. Geosci. Remote Sens., 52(10):6674-6687, October 2014. Keyword(s): SAR Processing, Fast-Factorized Back-Projection, FFBP, Time-Domain Back-Projection, TDBP, Airborne SAR, CARABAS Autofocus, SAR Autofocus, Geometrical Autofocus, radar imaging, radar tracking, synthetic aperture radar, ultra wideband radar, FGA algorithm, coherent all radio band system II data set, constrained problem, factorized geometrical autofocus algorithm, fast factorized back-projection chain, gain 3 dB, intensity correlation, object function, peak-to-sidelobe ratio measurement, radar imaging, residual space variant range cell migration, ultrawideband synthetic aperture radar processing, Apertures, Electronics packaging, Geometry, Radar tracking, Synthetic aperture radar, Transforms, Autofocus, back-projection, phase gradient algorithm (PGA), synthetic aperture radar (SAR). [Abstract] [bibtex-entry]


  18. Francesco De Zan, A. Parizzi, Pau Prats-Iraola, and Paco López-Dekker. A SAR Interferometric Model for Soil Moisture. IEEE_J_GRS, 52(1):418-425, January 2014. Keyword(s): dielectric properties, hydrological techniques, radar interferometry, remote sensing by radar, soil, synthetic aperture radar, Born approximation, L-band airborne SAR data, SAR interferometric model, coherence magnitudes, complex interferometric coherences, geometrical properties, interferogram triplets, phase consistency, plane waves, quantitatively synthetic aperture radar interferometric observables, scattering models, soil moisture, tomography, vertical complex wavenumbers, Coherence, L-band, Moisture, Soil moisture, Synthetic aperture radar, synthetic aperture radar (SAR) interferometry. [Abstract] [bibtex-entry]


  19. M. \cCetin, I. Stojanovic, N.O. Önhon, K.R. Varshney, S. Samadi, W.C. Karl, and A.S. Willsky. Sparsity-Driven Synthetic Aperture Radar Imaging: Reconstruction, autofocusing, moving targets, and compressed sensing. IEEE Signal Processing Magazine, 31(4):27-40, July 2014. Keyword(s): SAR Processing, Autofocus, compressed sensing, image representation, radar imaging, synthetic aperture radar, SAR image formation, SAR sensing mission design, anisotropy characterization, compressed sensing-based analysis, joint autofocusing, joint imaging, phase errors, sparsity-based methods, sparsity-driven synthetic aperture radar imaging, synthesis-based sparse signal representation formulations, wide-angle SAR imaging, Image reconstruction, Imaging, Radar imaging, Radar polarimetry, Scattering, Synthetic aperture radar. [Abstract] [bibtex-entry]


  20. E Bleszynski, M Bleszynski, and T Jaroszewicz. Autofocus algorithm for synthetic aperture radar imaging with large curvilinear apertures. Inverse Problems, 29(5):054004, April 2013. Keyword(s): SAR Processing, Autofocus, Airborne SAR, Gotcha SAR Data. [Abstract] [bibtex-entry]


  21. Lei Zhang, Hao-lin Li, Zhi-Jun Qiao, Meng-Dao Xing, and Zheng Bao. Integrating Autofocus Techniques With Fast Factorized Back-Projection for High-Resolution Spotlight SAR Imaging. IEEE Geosci. Remote Sens. Lett., 10(6):1394-1398, November 2013. Keyword(s): SAR Processing, Fast-Factorized Back-Projection, FFBP, Time-Domain Back-Projection, TDBP, Fourier transforms, geophysical techniques, remote sensing by radar, synthetic aperture radar, BP coordinate, BP imagery, FFBP SA images, FFBP recursion, FFBP sub-aperture images, Fourier transform, MAMD algorithm, MAMD recursion, conventional autofocus techniques integration, fast factorized back-projection, high efficiency FFBP, high precision FFBP, high-resolution SAR imaging, high-resolution spotlight SAR imaging, high-resolution synthetic aperture radar imaging, novel multiple aperture map drift algorithm, phase correction, phase error function, range-compressed phase history data, raw data, real data experiments, well-focused imagery, Apertures, Azimuth, Doppler effect, Fourier transforms, History, Signal processing algorithms, Synthetic aperture radar, Autofocus, back-projection (BP), fast factorized back-projection (FFBP), multiple aperture map drift (MAMD), synthetic aperture radar (SAR). [Abstract] [bibtex-entry]


  22. D. Zhu, R. Jiang, X. Mao, and Z. Zhu. Multi-Subaperture PGA for SAR Autofocusing. IEEE Transactions on Aerospace and Electronic Systems, 49(1):468-488, January 2013. Keyword(s): SAR Processing, Autofocus, synthetic aperture radar, SAR autofocusing, spotlight mode synthetic aperture radar, full-aperture phase gradient autofocus, PGA algorithm, high-order phase error, residual range cell migration, RCM, coherent processing interval, stripmap data, multisubaperture PGA algorithm, map drift technique, subaperture phase error, PGA-MD, Electronics packaging, Synthetic aperture radar, Azimuth, Image resolution, Accuracy, Polynomials, Estimation. [Abstract] [bibtex-entry]


  23. J. N. Ash. An Autofocus Method for Backprojection Imagery in Synthetic Aperture Radar. IEEE Geoscience and Remote Sensing Letters, 9(1):104-108, January 2012. Keyword(s): SAR Processing, Autofocus, autoregressive processes, convolution, digital elevation models, geophysical image processing, geophysical techniques, radar imaging, synthetic aperture radar, convolution backprojection, autofocus method, backprojection imagery, autofocus routine, spotlight-mode synthetic aperture radar data, image sharpness, imaging geometry, wide-angle aperture, digital elevation map, image-quality-based autofocus approach, natural geometric interpretation, optimal single-pulse phase correction, quartic polynomial, sequential imaging application, autoregressive backprojection, Synthetic aperture radar, Imaging, Apertures, Measurement, Optimization, History, Azimuth, Autofocus, autoregressive backprojection (ARBP), convolution BP (CBP) imaging, synthetic aperture radar (SAR). [Abstract] [bibtex-entry]


  24. Yake Li, Chang Liu, Yanfei Wang, and Qi Wang. A Robust Motion Error Estimation Method Based on Raw Data. IEEE Trans. Geosci. Remote Sens., 50(7):2780-2790, 2012. Keyword(s): SAR Processing, Autofocus, SAR Autofocus, MoComp, Motion Compensation, curve fitting, geophysical image processing, least squares approximations, motion compensation, radar imaging, remote sensing by radar, synthetic aperture radar, RCMC, aircraft reference track deviations, curve fitting, double phase gradient estimation, filtering method, high order motion errors, high precision navigation system, high resolution airborne SAR systems, high resolution imagery, image processing, image quality, large swath mode, light aircraft SAR platform, motion compensation, motion error estimation method, range cell migration correction, range dependent phase errors, range resolution improvement, raw data, synthetic aperture radar, weighted total least square method, Aircraft, Azimuth, Electronics packaging, Error analysis, Estimation, Robustness, Trajectory, Autofocus, motion error estimation, phase gradient filtering, synthetic aperture radar (SAR), weighted total least square (WTLS) method. [Abstract] [bibtex-entry]


  25. L. Zhang, Z. Qiao, M. Xing, L. Yang, and Z. Bao. A Robust Motion Compensation Approach for UAV SAR Imagery. IEEE Trans. Geosci. Remote Sens., 50(8):3202-3218, August 2012. Keyword(s): autonomous aerial vehicles, geophysical image processing, geophysical techniques, maximum likelihood estimation, motion compensation, remote sensing by radar, synthetic aperture radar, robust motion compensation approach, UAV SAR imagery, unmanned aerial vehicle, synthetic aperture radar, remote sensing application, atmospheric turbulence, range invariant motion error, weighted phase gradient autofocus, nonsystematic range cell migration function, range dependent phase error, maximum likelihood WPGA algorithm, subaperture phase error, inertial navigation system, Electronics packaging, Estimation, Trajectory, Robustness, Navigation, Thyristors, Geometry, Local maximum-likelihood (LML), motion compensation (MOCO), phase gradient autofocus (PGA), synthetic aperture radar (SAR), unmanned aerial vehicle (UAV), weighted phase gradient autofocus (WPGA). [Abstract] [bibtex-entry]


  26. Hubert M.J. Cantalloube and Carole E. Nahum. Multiscale Local Map-Drift-Driven Multilateration SAR Autofocus Using Fast Polar Format Image Synthesis. IEEE Trans. Geosci. Remote Sens., 49(10):3730-3736, 2011. Keyword(s): SAR Processing, Autofocus, SAR Autofocus, MoComp, Motion Compensation, Map-Drift Autofocus, Multiscale Local Map-Drift, geophysical image processing, geophysical techniques, image registration, remote sensing by radar, synthetic aperture radar, SAR high-resolution imaging, autofocus method, bistatic errors, bistatic synthetic aperture radar autofocus, clock drift errors, coarse-to-fine resolution, fast polar format image synthesis, frequency-domain polar format algorithm, local images, multilateration, range-clipped Doppler low-filtered profiles, target points, Doppler effect, Equations, Image resolution, Optical transmitters, Receivers, Synthetic aperture radar, Trajectory, Airborne radar, bistatic synthetic aperture radar (SAR), focusing. [Abstract] [bibtex-entry]


  27. Michael Jehle, Othmar Frey, David Small, and Erich Meier. Measurement of Ionospheric TEC in Spaceborne SAR Data. IEEE Trans. Geosci. Remote Sens., 48(6):2460-2468, June 2010. Keyword(s): SAR Processing, Total Electron Content Estimation, TEC Estimation, Ionospheric TEC, Faraday Rotation, Path Delay, Autofocus, TEC Autofocus, Spaceborne SAR, L-Band, ALOS, Phased Array L-band SAR, PALSAR, P-Pand, Simulation, Calibration. [Abstract] [bibtex-entry]


  28. P. Samczynski and K.S. Kulpa. Coherent MapDrift Technique. IEEE Trans. Geosci. Remote Sens., 48(3):1505-1517, 2010. Keyword(s): SAR Processing, Autofocus, SAR Autofocus, MoComp, Motion Compensation, Map-Drift Autofocus, Coherent Map-Drift Autofocus, geophysical signal processing, radar signal processing, remote sensing by radar, synthetic aperture radar, target tracking, Earth imaging, MapDrift principles, coherent MapDrift technique, flight parameter estimation, moving target indication, parametric autofocus technique, real time processing, strip mode SAR systems, synthetic aperture radar, Autofocus, MD, coherent MapDrift (CMD), moving-target indication (MTI), multilook, subaperture, synthetic aperture radar (SAR). [Abstract] [bibtex-entry]


  29. Howard A. Zebker, Scott Hensley, Piyush Shanker Agram, and C. Wortham. Geodetically Accurate InSAR Data Processor. IEEE Trans. Geosci. Remote Sens., 48(12):4309-4321, December 2010. Keyword(s): SAR Processing, InSAR data processor, focus correction phase terms, image distortion, interferometric synthetic aperture radar, motion-compensation techniques, orbit tracking, radar echoes, radar interferometry, topography-corrected interferograms, motion compensation, radar interferometry, synthetic aperture radar;. [Abstract] [bibtex-entry]


  30. R. L. Morrison, M. N. Do, and D. C. Munson. MCA: A Multichannel Approach to SAR Autofocus. IEEE Transactions on Image Processing, 18(4):840-853, April 2009. Keyword(s): SAR Processing, Autofocus, SAR autofocus, defocusing operation, focused image, image restoration, linear algebraic formulation, multichannel autofocus, multichannel redundancy, sharpness metric optimization, synthetic aperture radar, vector-space formulation, image restoration, linear algebra, synthetic aperture radar;. [Abstract] [bibtex-entry]


  31. Andreas .R. Brenner and Ludwig Roessing. Radar Imaging of Urban Areas by Means of Very High-Resolution SAR and Interferometric SAR. IEEE Trans. Geosci. Remote Sens., 46(10):2971-2982, Oct. 2008. Keyword(s): SAR Processing, InSAR, Interferometry, SAR Interferometry, X-Band, Repeat-Pass Interferometry, Repeat-Pass, Single-Pass, Airborne SAR, PAMIR, Autofocus, Residual Motion Errors, Motion Compensation, MoComp, earthquakes, radar imaging, radar interferometry, remote sensing by radar, synthetic aperture radar, topography (Earth), Forschungsgesellschaft fur Angewandte Naturwissenschaften, Germany, Research Institute for High Frequency Physics and Radar Techniques, Wachtberg, X-band demonstrator, building recognition, building reconstruction, earthquake damage mapping, interferometric SAR sensor, phased array multifunctional imaging radar, radar-based urban analysis, remote-sensing applications, structural image analysis, subdecimeter resolution features, urban area monitoring, urban elevation models. [Abstract] [bibtex-entry]


  32. Karlus A. Câmara de Macedo, Rolf Scheiber, and Alberto Moreira. An Autofocus Approach for Residual Motion Errors With Application to Airborne Repeat-Pass SAR Interferometry. IEEE Transactions on Geoscience and Remote Sensing, 46(10):3151-3162, October 2008. Keyword(s): SAR Processing, Autofocus, Residual Motion Errors, WPCA, Weighted PCA, Weighted Phase Curvature Autofocus, Phase Curvature Autofocus, PCA, Phase Gradient Autofocus, PGA, Repeat-Pass Interferometry, Interferometry, InSAR, D-InSAR, Differential SAR Interferometry, E-SAR, airborne SAR, Baseline Calibration, Tomography, SAR Tomography, deformation, geophysical techniques, synthetic aperture radar, topography (Earth)E-SAR system, German Aerospace Center, airborne repeat-pass SAR Interferometry, autofocus algorithm, autofocus techniques, high-precision navigation system, image processing, interferometric-phase accuracy, phase curvature autofocus, residual motion errors, synthetic-aperture-radar, terrain deformations measurement, weighted least squares phase estimation. [Abstract] [bibtex-entry]


  33. José-Tomás González-Partida, Pablo Almorox-González, Mateo Burgos-Garcìa, and Blas-Pablo Dorta-Naranjo. SAR System for UAV Operation with Motion Error Compensation beyond the Resolution Cell. Sensors, Special Issue on Synthetic Aperture Radar, 8(5):3384-3405, 2008. Keyword(s): SAR Processing, Motion Compensation, MoComp, Airborne SAR, UAV, Unmanned Airborne Vehicle, LFM-CW, Continuous Wave SAR, Phase Gradient Autofocus, Autofocus, PGA, Range Alignment, Residual Motion Errors, mmW SAR, mmW, Ka-Band SAR. [Abstract] [bibtex-entry]


  34. S. Perna, C. Wimmer, J. Moreira, and G. Fornaro. X-Band Airborne Differential Interferometry: Results of the OrbiSAR Campaign Over the Perugia Area. IEEE Trans. Geosci. Remote Sens., 46(2):489-503, February 2008. Keyword(s): SAR Processing, BFNT, Backward-Forward to the Nominale Track, Airborne SAR, D-InSAR, differential SAR interferometry, Interferometry, OrbiSAR, X-Band, Motion Compensation, Residual Motion Errors, Autofocus, airborne radar, motion compensation, radar imaging, synthetic aperture radar airborne SAR images, digital elevation model inaccuracies, motion compensation errors, phase errors. [Abstract] [bibtex-entry]


  35. Robert. L. Morrison, Minh N. Do, and David C. Munson. SAR Image Autofocus By Sharpness Optimization: A Theoretical Study. IEEE Transactions on Image Processing, 16(9):2309-2321, September 2007. Keyword(s): SAR Processing, Autofocus, SAR image autofocus, intensity-squared metric, point-targets image, sharpness optimization, synthetic aperture radar, image processing, optimisation, synthetic aperture radar, Algorithms, Artificial Intelligence, Computer Simulation, Image Enhancement, Image Interpretation, Computer-Assisted, Models, Theoretical, Pattern Recognition, Automated, Reproducibility of Results, Sensitivity and Specificity;. [Abstract] [bibtex-entry]


  36. T. J. Schulz. Optimal Sharpness Function for SAR Autofocus. IEEE Signal Processing Letters, 14(1):27-30, January 2007. Keyword(s): error correction, error statistics, maximum likelihood estimation, radar imaging, synthetic aperture radar, image-domain sharpness function, autofocusing, phase-error correction, synthetic aperture radar imagery, SAR, optimization, statistical estimation, maximum-likelihood estimation, maximum-posterior estimation, intensity-squared sharpness, Layout, Phase estimation, Optimization methods, Synthetic aperture radar, Discrete Fourier transforms, Maximum likelihood estimation, Reflectivity, Error correction, Computer errors, Signal processing, MAP estimation, synthetic aperture radar (SAR). [Abstract] [bibtex-entry]


  37. Hubert-M.J. Cantalloube and Pascale Dubois-Fernandez. Airborne X-band SAR imaging with 10 cm resolution: technical challenge and preliminary results. IEE Proceedings - Radar, Sonar and Navigation, 153(2):163-176, April 2006. Keyword(s): SAR Processing, Doppler radar, airborne radar, antenna radiation patterns, frequency-domain synthesis, image resolution, microwave antennas, radar antennas, radar cross-sections, radar imaging, radar resolution, radar tracking, synthetic aperture radar, 1.2 GHz, Ku-band, RAMSES, bandwidth, X-band, Airborne SAR, antenna pattern compensation, carrier trajectory, cross-range resolution, deterministic motion, fast-frequency domain synthesis, isotropic point-like echo, phase-tracking, Autofocus, Residual Motion Errors, Motion Compensation, MoComp, Time-Domain Back-Projection, TDBP, temporal-domain back-projection synthesis. [Abstract] [bibtex-entry]


  38. W. L. Van Rossum, M. P. G. Otten, and R. J. P. Van Bree. Extended PGA for range migration algorithms. IEEE Transactions on Aerospace and Electronic Systems, 42(2):478-488, April 2006. Keyword(s): SAR Proceedings, Autofocus, Phase Gradient Autofocus, PGA, gradient methods, radar imaging, Range Migration Algorithm, omega-k, Wavenumber Domain Algorithm, Spotlight SAR, synthetic aperture radar. [Abstract] [bibtex-entry]


  39. Gianfranco Fornaro, Giorgio Franceschetti, and Stefano Perna. Motion compensation errors: effects on the accuracy of airborne SAR images. IEEE Transactions on Aerospace and Electronic Systems, 41(4):1338-1352, October 2005. Keyword(s): SAR Processing, Motion Compensation, Residual Motion Errors, Autofocus, Airborne SAR, airborne radar, interferometry, motion compensation, radar imaging, synthetic aperture radar airborne SAR images, digital elevation model inaccuracies, motion compensation errors, phase errors, positioning measurement instrument, repeat pass airborne interferometry, residual uncompensated motion errors, synthetic aperture radar. [Abstract] [bibtex-entry]


  40. J. R. Fienup and J. J. Miller. Aberration correction by maximizing generalized sharpness metrics. J. Opt. Soc. Am. A, 20(4):609-620, April 2003. Keyword(s): SAR Processing, Autofocus, Active or adaptive optics, Image reconstruction techniques, Image reconstruction-restoration, Phase retrieval, Image quality assessment, Phased-array imaging systems, Synthetic aperture radar, Aberration correction, Adaptive optics, Discrete Fourier transforms, Fast Fourier transforms, Image quality, Synthetic aperture radar. [Abstract] [bibtex-entry]


  41. H.L. Chan and T.S. Yeo. Non-iterative quality phase-gradient autofocus (QPGA) algorithm for spotlight SAR imagery. IEEE Trans. Geosci. Remote Sens., 40(11):2517, November 2002. Keyword(s): SAR Processing, Autofocus, Phase Gradient Autofocus, Quality Phase Gradient Autofocus, QPGA. [Abstract] [bibtex-entry]


  42. J. Li, Z. Bi, and Z.-S. Liu. Autofocus and feature extraction in curvilinear SAR via a relaxation-based algorithm. Radar, Sonar and Navigation, IEE Proceedings -, 146(4):201-207, 1999. Keyword(s): SAR Processing, Non-Linear Flight Path, SAR Tomography, Curvilinear SAR, error analysis, feature extraction, focusing, radar imaging, synthetic aperture radar, 3D target features, AUTORELAX, CLSAR, SAR imaging, aperture errors compensation, curvilinear SAR, curvilinear synthetic aperture radar, data model, estimation accuracy, experimental results, relaxation-based algorithm, relaxation-based autofocus algorithm, simulation results, target parameters. [Abstract] [bibtex-entry]


  43. Wei Ye, Tat Soon Yeo, and Zheng Bao. Weighted least-squares estimation of phase errors for SAR/ISAR autofocus. IEEE Transactions on Geoscience and Remote Sensing, 37(5):2487-2494, September 1999. Keyword(s): SAR Processsing, Autofocus, Weighted Least-Squares Estimation, WLS, Residual Motion Errors, geophysical techniques, measurement errors, remote sensing by radar, synthetic aperture radar, terrain mapping, ISAR, SAR, geophysical measurement technique, inverse SAR, land surface, phase error, phase error estimation, phase errors, radar remote sensing. [Abstract] [bibtex-entry]


  44. Hian Lim Chan and Tat Soon Yeo. Noniterative quality phase-gradient autofocus (QPGA) algorithm for spotlight SAR imagery. IEEE Trans. Geosci. Remote Sens., 36(5):1531-1539, September 1998. Keyword(s): SAR Processing, Autofocus, Phase Gradient Autofocus. [Abstract] [bibtex-entry]


  45. Zheng-She Liu and Jian Li. Synthetic-aperture-radar motion compensation and feature extraction by means of a relaxation-based algorithm. J. Opt. Soc. Am. A, 15(3):599-610, 1998. Keyword(s): SAR Processing, Autofocus, Motion Compensation, MoComp, Residual Motion Errors, Airborne SAR, Phase Gradient Autofocus, PGA, RELAX, MCRELAX, Cramer-Rao Bound, Parametric Estimation. [bibtex-entry]


  46. Andrea Monti-Guarnieri. Residual SAR Focusing: An Application to Coherence Improvement. IEEE Transactions on Geoscience and Remote Sensing, 34(1):201-211, January 1996. Keyword(s): SAR Processing, Interferometry, Residual Azimuth Compression, Coherence Improvement. [Abstract] [bibtex-entry]


  47. T. M. Calloway and G. W. Donohoe. Subaperture autofocus for synthetic aperture radar. IEEE Transactions on Aerospace and Electronic Systems, 30(2):617-621, 1994. Keyword(s): SAR Processing, Autofocus. [Abstract] [bibtex-entry]


  48. D.E. Wahl, P.H. Eichel, D.C. Ghiglia, and C.V. Jakowatz. Phase gradient autofocus-a robust tool for high resolution SAR phase correction. IEEE Transactions on Aerospace and Electronic Systems, 30(3):827-835, July 1994. Keyword(s): SAR Processing, Autofocus, Phase Gradient Autofocus. [Abstract] [bibtex-entry]


  49. Charles V. Jakowatz and Daniel E. Wahl. Eigenvector method for maximum-likelihood estimation of phase errors in synthetic-aperture-radar imagery. J. Opt. Soc. Am. A, 10(12):2539-2546, 1993. Keyword(s): SAR Processing, Autofocus, Motion Compensation, MoComp, Residual Motion Errors, Airborne SAR, Phase Gradient Autofocus, PGA, Eigenvector Method, Maximum Likelihood Estimation. [bibtex-entry]


  50. C. Y. Chang, M. Jin, and John C. Curlander. SAR Processing Based on the Exact Two-Dimensional Transfer Function. IGARSS '92, International Geoscience and Remote Sensing Symposium, pp 355-359, May 1992. Keyword(s): SAR Processing, Azimuth Processing, Range-Doppler Algorithm, Range Migration Algorithm, Wavenumber Domain Algorithm, omega-k, Point Target Transfer Funtion, Two-Dimensional Fourier Transform, Doppler Centroid, Doppler Rate Estimation, Autofocus. [Abstract] [bibtex-entry]


  51. Jorgen Dall. A Fast Autofocus Algorithm for Synthetic Aperture Radar Processing. IEEE International Conference on Acoustics, Speech, and Signal Processing ICASSP, 3:5-8, September 1992. Keyword(s): SAR Processing, Doppler Rate Estimation, Autofocus, Airborne SAR. [Abstract] [bibtex-entry]


  52. João Moreira. A New Method Of Aircraft Motion Error Extraction From Radar Raw Data For Real Time Motion Compensation. IEEE Transactions on Geoscience and Remote Sensing, 28(4):620-626, July 1990. Keyword(s): SAR Processing, Autofocus, Motion Compensation, MoComp, Residual Motion Errors, Airborne SAR, ESAR. [Abstract] [bibtex-entry]


  53. D. Blacknell, A. Freeman, S. Quegan, I.A. Ward, I.P. Finley, C.J. Oliver, R.G. White, and J.W. Wood. Geometric accuracy in airborne SAR images. Aerospace and Electronic Systems, IEEE Transactions on, 25(2):241-258, March 1989. Keyword(s): SAR Processing, Airborne SAR, Motion Compensation, Motion Errors, Residual Motion Errors, aircraft instrumentation, microwave imaging, position measurement, radar, X-band, airborne SAR images, autofocus, azimuth processing, azimuthal positioning accuracy, defocusing, geometric accuracy, range positioning accuracy, synthetic aperture radar. [Abstract] [bibtex-entry]


  54. P. H. Eichel, D. C. Ghiglia, and C. V. Jakowatz. Speckle processing method for synthetic-aperture-radar phase correction. Opt. Lett., 14(1):1, 1989. Keyword(s): SAR Processing, Autofocus, Phase Gradient Autofocus, PGA. [Abstract] [bibtex-entry]


  55. P. H. Eichel and C. V. Jakowatz. Phase-gradient algorithm as an optimal estimator of the phase derivative. Opt. Lett., 14(20):1101, 1989. Keyword(s): SAR Processing, Autofocus, Phase Gradient Autofocus, PGA. [Abstract] [bibtex-entry]


  56. Dennis C. Ghiglia and Gary A. Mastin. Two-dimensional phase correction of synthetic-aperture-radar imagery. Opt. Lett., 14(20):1104-1106, October 1989. Keyword(s): SAR processing, Autofocus, Atmospheric turbulence, Coherent systems, Fourier transforms, Phase estimation, Point spread function, Speckle imaging. [Abstract] [bibtex-entry]


  57. Fuk-Kwok Li, Daniel N. Held, John C. Curlander, and Chialin Wu. Doppler Parameter Estimation for Spaceborne Synthetic-Aperture Radars. IEEE Transactions on Geoscience and Remote Sensing, 23(1):47-56, 1985. Keyword(s): SAR Processing, Doppler Centroid, Doppler Centroid Estimation, Doppler Ambiguity Resolver, DAR, Clutterlock, Satellite SAR, SEASAT, Doppler Rate Estimation, Autofocus. [Abstract] [bibtex-entry]


Conference articles

  1. Silvan Leinss, Shiyi Li, and Othmar Frey. Measuring Glacier Velocity by Autofocusing Temporally Multilooked SAR Time Series. In Proc. IEEE Int. Geosci. Remote Sens. Symp., pages 5493-5496, July 2021. IEEE. [Abstract] [bibtex-entry]


  2. Daniel Henke, Max Frioud, Julian Fagir, Sebastien Guillaume, Michael Meindl, Alain Geiger, S. Sieger, D. Janssen, F. Kloppel, M. Caris, S. Stanko, M. Renker, and Peter Wellig. Miranda35 Experiments in Preparation for Small UAV-Based SAR. In Proc. IEEE Int. Geosci. Remote Sens. Symp., pages 8542-8545, July 2019. Keyword(s): airborne radar, autonomous aerial vehicles, CW radar, FM radar, Global Positioning System, image motion analysis, radar imaging, radar receivers, synthetic aperture radar, units (measurement), frequency-modulated continuous-wave synthetic aperture radar, energy efficiency, navigation data, inertial measurement unit, IMU, SAR image quality, airborne platform, SAR autofocus, small UAV-based SAR systems, FMCW SAR, Miranda35 experiments, moving baseline differential GPS, optical structure-from-motion-based localization, FHR FMCW MIRANDA35 sensor, Synthetic aperture radar, Global Positioning System, Radar polarimetry, Cameras, Optical sensors, SAR autofocus, navigation, synthetic aperture radar, small UAV. [Abstract] [bibtex-entry]


  3. Dennis Valuyskiy, Sergey Vityazev, and Vladimir Vityazev. Resolution Improvement in Ground-Mapping Car-Borne Radar Imaging Systems. In 2019 IEEE International Conference on Imaging Systems and Techniques (IST), pages 1-5, December 2019. Keyword(s): SAR processing, carborne SAR, terrestrial radar interferometry, autofocus, phase gradient autofocus, image resolution, motion compensation, radar imaging, radar resolution, road vehicle radar, motion compensation technique, data acquisition, radar system, ground-mapping car-borne radar imaging systems, resolution improvement, Radar imaging, Electronics packaging, Data acquisition, Motion compensation, Radar antennas, Image resolution, radar imaging, PGA, autofocus, car-borne radar imaging, motion compensation, resolution improvement. [Abstract] [bibtex-entry]


  4. Othmar Frey, Charles L. Werner, Rafael Caduff, and Andreas Wiesmann. Inversion of Snow Structure Parameters from Time Series of Tomographic Measurements With SnowScat. In Proc. IEEE Int. Geosci. Remote Sens. Symp., pages 2472-2475, 2017. Keyword(s): SAR Processing, SAR Tomography, Tomographic profiling, SnowScat, ESA, European Space Agency, X-Band, Ku-Band, Polarimetry, ground-based radar, Snow, Snowpack, geophysical signal processing, radar polarimetry, synthetic aperture radar, SWE, Snow Water Equivalent, Autofocus, Time-Domain Back-Projection, TDBP, Backprojection. [Abstract] [bibtex-entry]


  5. 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]


  6. Jan Torgrimsson, Patrik Dammert, Hans Hellsten, and Lars M. H. Ulander. Autofocus and analysis of geometrical errors within the framework of fast factorized back-projection. In Edmund Zelnio and Frederick D. Garber, editors, Proc. SPIE, volume 9093, pages 909303-909303-16, 2014. International Society for Optics and Photonics, SPIE. Keyword(s): SAR Processing, Fast-Factorized Back-Projection, FFBP, Time-Domain Back-Projection, TDBP, Autofocus, SAR Autofocus, Geometrical Autofocus, Airborne SAR, CARABAS, factorized geometrical autofocus algorithm, fast factorized back-projection chain, gain 3 dB, intensity correlation, object function, peak-to-sidelobe ratio measurement, radar imaging, residual space variant range cell migration, ultrawideband synthetic aperture radar processing, Apertures, Electronics packaging, Geometry, Radar tracking, Synthetic aperture radar, Transforms, Autofocus, back-projection, phase gradient algorithm, PGA, synthetic aperture radar (SAR). [Abstract] [bibtex-entry]


  7. O.O. Bezvesilniy, I. M. Gorovyi, and D. M. Vavriv. Estimation of phase errors in SAR data by Local-Quadratic map-drift autofocus. In Proc. Int. Radar Symp., pages 376-381, 2012. Keyword(s): SAR Processing, Autofocus, SAR Autofocus, MoComp, Motion Compensation, Map-Drift Autofocus, airborne radar, radar imaging, synthetic aperture radar, SAR data, SAR images, X-band airborne SAR system, arbitrary residual phase error, local-quadratic map-drift autofocus, phase error estimation, quadratic errors, small data blocks, uncompensated phase errors, Antennas, Azimuth, Bandwidth, Doppler effect, Measurement uncertainty, Radar, Trajectory, autofocus, map-drift, motion compensation, motion errors, synthetic aperture radar. [Abstract] [bibtex-entry]


  8. 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]


  9. Leif Harcke, L. Weintraub, Sang-Ho Yun, R. Dickinson, E. Gurrola, Scott Hensley, and N. Marechal. Spotlight-mode synthetic aperture radar processing for high-resolution lunar mapping. In Proc. IEEE Radar Conference, pages 1260-1264, May 2010. Keyword(s): AD 2008 to 2009, Goldstone Solar System Radar, NASA LCROSS mission impact site, autofocus technique, time-domain back-projection, bistatic time-domain backprojection technique, bistatic SAR, change detection techniques, fast-time Doppler removal, focus-plane motion, geolocation, high-resolution lunar mapping, local topography, lunar poles, phase errors, polar format algorithm, preprocessing system, radar interferometry, radar mapping, resolution cells, spotlight imaging techniques, spotlight-mode synthetic aperture radar processing, topographic mapping, geophysical equipment, radar interferometry, remote sensing by radar, synthetic aperture radar. [Abstract] [bibtex-entry]


  10. Hans Hellsten, Patrick Dammert, and Anders Ahlander. Autofocus in fast factorized backprojection for processing of SAR images when geometry parameters are unknown. In Proc. IEEE Radar Conf., pages 603-608, May 2010. Keyword(s): SAR Processing, Autofocus, Time-Domain Back-Projection, TDBP, FFBP, SAR image processing, antenna path parameters, autofocus, fast factorized backprojection, radar imaging, synthetic aperture radar. [Abstract] [bibtex-entry]


  11. Scott Hensley, E. Gurrola, Leif Harcke, M. Slade, K. Quirk, M. Srinivasan, C. Lee, Sang-Ho Yun, J. Jao, B. Wilson, E. De Jong, N. Marechal, L. Weintraub, R. Dickinson, R. Bloom, G. Karamyan, and A. Lilje. Lunar topographic mapping using a new high resolution mode for the GSSR radar. In Proc. IEEE Radar Conference, pages 464-469, May 2010. Keyword(s): Doppler image formation technique, Earth based radar interferometric measurement, Goldstone Solar System Radar, Moon topography mapping, autofocusing method, bandwidth 40 MHz, geodetic control, high resolution mode, interferograms, lidar topography maps, lunar topographic mapping, lunar topographic maps, range image formation technique, spotlight mode processing, Doppler radar, Moon, astronomical image processing, image resolution, optical radar, radar imaging, radar interferometry, radar resolution. [Abstract] [bibtex-entry]


  12. Charles V. Jakowatz, Daniel E. Wahl, and David A. Yocky. A beamforming algorithm for bistatic SAR image formation. In Edmund G. Zelnio and Frederick D. Garber, editors, , volume 7699, pages 769902, 2010. SPIE. Keyword(s): SAR Processing, Bistatic SAR, Bistatic Spotlight-mode SAR, Autofocus, Autofocus in the TDBP Framework, Back-projection, Time-Domain Back-Projection, TDBP, Fast Back-projection, Fast Factorized Back-Projection, FFBP, Spotlight SAR, Spotlight-mode data, Beamforming. [bibtex-entry]


  13. Charles V. Jakowatz and Daniel E. Wahl. Considerations for autofocus of spotlight-mode SAR imagery created using a beamforming algorithm. In Edmund G. Zelnio and Frederick D. Garber, editors, , volume 7337, pages 73370A, 2009. SPIE. Keyword(s): SAR Processing, Autofocus, Autofocus in the TDBP Framework, Back-projection, Time-Domain Back-Projection, TDBP, Fast Back-projection, Fast-Factorized Back-Projection, FFBP, Spotlight SAR, Spotlight-mode data, Beamforming. [bibtex-entry]


  14. A. Wyholt and Lars M. H. Ulander. Evaluating VHF-band SAR autofocus algorithms using a forest backscatter model. In Proc. IEEE Int. Geosci. Remote Sens. Symp., volume 4, pages 9-12, July 2009. Keyword(s): SAR Processing, Autofocus, Time-Domain Back-Projection, TDBP, FFBP, SAR subimages, VHF-band SAR autofocus algorithms, fast factorized back-projection algorithm, forest backscatter model, forest clutter model, matching error, residual displacement errors, subimage matching, backscatter, focusing, geophysical image processing, image matching, remote sensing by radar, synthetic aperture radar. [Abstract] [bibtex-entry]


  15. Hubert M. J. Cantalloube, Élise Colin-Koeniguer, and Hélène Oriot. High resolution SAR imaging along circular trajectories. In IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2007, pages 850-853, July 2007. Keyword(s): SAR Processing, Autofocus, Phase Gradient Autofocus, PGA, Autofocus by Deterministic Trajectory Triangulation Technique, data acquisition, Motion Compensation, MoComp, Residual Motion Errors, radar antennas, radar polarimetry, remote sensing by radar, synthetic aperture radar, L-band radar, P-band radar, Sweden, X-band sensor, Airborne SAR, aircraft attitude fluctuation, circular trajectories, Non-Linear Flight Track, high resolution SAR imaging, joint FOI-ONERA campaign, narrower antenna pattern, polarimetric full circle radar acquisition, steerable antenna. [Abstract] [bibtex-entry]


  16. Karlus A. Câmara de Macedo, Rolf Scheiber, and Alberto Moreira. An autofocus approach for residual motion errors with application to airborne repeat-pass SAR interferometry. In IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2007, Barcelona, Spain, pages 4886 - 4889, July 2007. Keyword(s): SAR Processing, Autofocus, Residual Motion Errors, WPCA, Weighted PCA, Weighted Phase Curvature Autofocus, Phase Curvature Autofocus, PCA, Phase Gradient Autofocus, PGA, Repeat-Pass Interferometry, Interferometry, E-SAR, airborne SAR, Baseline Calibration, Tomography, SAR Tomography. [Abstract] [bibtex-entry]


  17. Karlus A. Câmara de Macedo, Rolf Scheiber, and Alberto Moreira. First Evaluations of Airborne InSAR Time-Series. In Proc. of EUSAR 2006 - 6th European Conference on Synthetic Aperture Radar, 2006. Keyword(s): SAR Processing, PSI, Persistent Scatterer Interferometry, Differential SAR Interferometry, Permanent Scatterers, Phase Gradient Autofocus, PS-PGA, Autofocus, Motion Compensation, Residual Motion Error, Repeat-Pass Interferometry, Phase Calibration, Baseline Calibration, Tomographic Baseline Calibration, Airborne SAR, E-SAR. [Abstract] [bibtex-entry]


  18. An Daoxiang, Huang Xiaotao, and Wang Liang. Contrast Optimized PGA Algorithm for P-band UWB SAR. In Radar, 2006. CIE '06. International Conference on, pages 1-4, Oct. 2006. Keyword(s): SAR Processing, Autofocus, Phase Gradient Autofocus, Contrast Optimization. [Abstract] [bibtex-entry]


  19. Charles V. Jakowatz and Daniel E. Wahl. Correction of propagation-induced defocus effects in certain spotlight-mode SAR collections. In Edmund G. Zelnio and Frederick D. Garber, editors, , volume 6237, pages 62370I, 2006. SPIE. Keyword(s): SAR Processing, Polar Format Algorithm, PFA, Atmospheric Influence, Phase Gradient Algorithm, PGA, Autofocus, Residual Phase Errors, Residual Error, Spotlight SAR, Spotlight-mode data. [bibtex-entry]


  20. Brian D. Rigling. Multistage entropy minimization for SAR image autofocus. In Edmund G. Zelnio and Frederick D. Garber, editors, Algorithms for Synthetic Aperture Radar Imagery XIII, volume 6237, pages 150 - 159, 2006. International Society for Optics and Photonics, SPIE. Keyword(s): SAR Processing, SAR, ground map, autofocus. [Abstract] [bibtex-entry]


  21. Armin W. Doerry. Autofocus correction of SAR images exhibiting excessive residual migration. In Robert N. Trebits and James L. Kurtz, editors, Proceedings of SPIE Vol. 5788, Radar Sensor Technology IX, volume 5788, pages 34-45, 2005. SPIE. Keyword(s): SAR Processing, Autofocus, Phase Gradient Autofocus. [Abstract] [bibtex-entry]


  22. J. Kolman. PACE: an autofocus algorithm for SAR. In Proc. IEEE Int. Radar Conference, pages 310-314, May 2005. Keyword(s): SAR Processing, Autofocus, Phase Adjustment by Contrast Enhancement, PACE, Azimuth, Focusing, Error correction, Synthetic aperture radar, Phase measurement, Pixel, Flexible printed circuits, Hardware, History, Error analysis. [bibtex-entry]


  23. V. C. Koo, T. S. Lim, and H. T. Chuah. A Comparison of Autofocus Algorithms for SAR Imagery. In Progress In Electromagnetics Research Symposium, volume 1, Hangzhou, China, pages 16-9, 2005. Keyword(s): SAR Processing, Autofocus, Motion Compensation, MoComp, Residual Motion Errors, Comparion of Algorithms, Comparison of Autofocus Algorithms, Airborne SAR, Phase Gradient Autofocus, PGA, Eigenvector Method, Maximum Likelihood Estimation. [Abstract] [bibtex-entry]


  24. Qulin Tan, Zhou Fu, Zhengjun Liu, and Jiping Hu. An experiment for high resolution airborne SAR imaging based on phase gradient autofocus. In Geoscience and Remote Sensing Symposium, 2005. IGARSS '05. Proceedings. 2005 IEEE International, volume 5, pages 3322-3324, July 2005. Keyword(s): SAR Processing, Autofocus, Phase Gradient Autofocus. [bibtex-entry]


  25. 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]


  26. 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]


  27. Hubert-M.J. Cantalloube and Pascale Dubois-Fernandez. Airborne X-band SAR imaging with 10 cm resolution - technical challenge and preliminary results. In , volume 1, pages 185-187, July 2003. Keyword(s): SAR Processing, Motion Compensation, Autofocus, radar cross-sections, radar imaging, radar resolution, remote sensing by radar, synthetic aperture radar 2 1/2 D surface modelling, Doppler algorithms, Ku bands, RAMSES, X-Band, X-band SAR imaging, Airborne SAR, antenna pattern compensation method, back-injection synthesis algorithm, carrier trajectory, clutter appearance, differential GPS-hybridized inertial navigation unit, high resolution clutters, isotropic echoes, matching cross-range resolution, optical surface modelling, phase tracking, point-like echoes, Range Migration Algorithm, resolution cell, synthetic aperture radar, TDBP, Time-Domain Back-Projection, temporal-domain synthesis algorithm, texture simulations, omega-k algorithm. [Abstract] [bibtex-entry]


  28. Tuo Fu, Meiguo Gao, and Yuan He. An improved scatter selection method for phase gradient autofocus algorithm in SAR/ISAR autofocus. In Neural Networks and Signal Processing, 2003. Proceedings of the 2003 International Conference on, volume 2, pages 1054-1057, December 2003. Keyword(s): SAR Processing, Autofocus, Phase Gradient Autofocus. [bibtex-entry]


  29. T.J. Sutton, H.D. Griffiths, S.A. Chapman, R. Crook, and M. Way. Optimizing a three-stage autofocus system for synthetic aperture imaging using a UUV. In OCEANS 2003. Proceedings, volume 5, pages 2433-2437, September 2003. [bibtex-entry]


  30. 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]


  31. P. Berens. Estimation of Carrier Track For High Precision SAR Imaging Using Active Reference Reflectors. In Proc. of EUSAR 2002 - 4th European Conference on Synthetic Aperture Radar, pages 241-244, 2002. Keyword(s): SAR Processing, Active Reflector, Transponder, Autofocus, Carrier Track Estimation, Flight Track Estimation, Kalman Filter, PAMIR, X-Band. DGPS, INS. [Abstract] [bibtex-entry]


  32. R.L. Morrison, Jr. and David C. Munson, Jr.. An experimental study of a new entropy-based SAR autofocus technique. In Image Processing. 2002. Proceedings. 2002 International Conference on, volume 2, pages 441-444, September 2002. Keyword(s): SAR Processing, Autofocus, Phase Gradient Autofocus. [bibtex-entry]


  33. M. Weiss and P. Berens. Motion compensation of wideband synthetic aperture radar with a new transponder technique. In IEEE International Geoscience and Remote Sensing Symposium, 2002. IGARSS '02., volume 6, pages 3649-3651, June 2002. Keyword(s): SAR Processing, Motion Compensation, calibration, Autofocus, phased array radar, radar imaging, synthetic aperture radar, transponder, PAMIR, SAR, active transponders, coherent integration, echoes, large synthetic aperture, phased array multifunctional imaging radar, radar pulses, transponder technique, wideband synthetic aperture radar. [Abstract] [bibtex-entry]


  34. Richard Abrahamsson, Jian Li, Petre Stoica, and Gunnar Thordarson. Sensitivity of two autofocus algorithms to spatially variant phase errors. In E. G. Zelnio, editor, Proceedings of SPIE Vol. 5788, volume 4382 of Presented at the Society of Photo-Optical Instrumentation Engineers (SPIE) Conference, pages 29-40, August 2001. Keyword(s): SAR Processing, Phase Gradient Autofocus, PGA, AUTOCLEAN, CLEAN, Polar Format Algorithm, Autofocus, Residual Motion Errors, Motion Errors, Motion Compensation, MoComp, Motion Through Resolution Cells, Spatially Variant Phase Errors, Airborne SAR. [Abstract] [bibtex-entry]


  35. M. Preiss, D. Gray, and N.J.S. Stacy. The effect of polar format resampling on uncompensated motion phase errors and the phase gradient autofocus algorithm. In Geoscience and Remote Sensing Symposium, 2001. IGARSS '01. IEEE 2001 International, volume 3, pages 1442-1444, July 2001. Keyword(s): SAR Processing, Autofocus, Phase Gradient Autofocus. [bibtex-entry]


  36. J. C. Kirk, R. Lefevre, R. Van Daalen Wetters, D. Woods, and B. Sullivan. Signal based motion compensation (SBMC). In Record of the IEEE 2000 International Radar Conference, pages 463-468, May 2000. Keyword(s): SAR Processing, Autofocus, motion compensation, radar theory, radar signal processing, aircraft navigation, jamming, air traffic control, signal based motion compensation, SAR, down range compensation, cross range compensation, radar signal, platform motion, aircraft navigation, autofocus performance, navigation system performance degradation, component failure, GPS jamming, Motion compensation, Costs, Robustness, Motion measurement, Radar measurements, Airborne radar, Aircraft navigation, System performance, Degradation, Global Positioning System. [Abstract] [bibtex-entry]


  37. D.G. Thompson, J.S. Bates, and D.V. Arnold. Extending the phase gradient autofocus algorithm for low-altitude stripmap mode SAR. In The Record of the 1999 IEEE Radar Conference, pages 36-40, April 1999. Keyword(s): SAR Processing, Autofocus, Phase Gradient Autofocus, Strip-map, Range-Dependent. [bibtex-entry]


  38. D.G. Thompson, J.S. Bates, D.V. Arnold, and David G. Long. Extending the phase gradient autofocus algorithm for low-altitude stripmap mode SAR. In IEEE International Geoscience and Remote Sensing Symposium, IGARSS '99, volume 1, pages 564-566, July 1999. Keyword(s): SAR Processing, Autofocus, Phase Gradient Autofocus, Strip-map, Range-dependent. [bibtex-entry]


  39. P. Tsakalides and C.L. Nikus. A new phase gradient autofocus technique for high resolution image formation based on fractional lower-order statistics. In Electronics, Circuits and Systems, 1999. Proceedings of ICECS '99. The 6th IEEE International Conference on, volume 2, pages 667-670, September 1999. Keyword(s): SAR Processing, Autofocus, Phase Gradient Autofocus. [bibtex-entry]


  40. P. Zavattero. Distributed target SAR image de-blurring using phase gradient autofocus. In Radar Conference, 1999. The Record of the 1999 IEEE, pages 246-249, April 1999. Keyword(s): SAR Processing, Autofocus, Phase Gradient Autofocus. [Abstract] [bibtex-entry]


  41. Li Liwei, Asif Raza, and Mao Shiyi. Improvement of rank one phase estimation (ROPE) autofocusing technique. In Signal Processing Proceedings, 1998. ICSP '98. 1998 Fourth International Conference on, volume 2, pages 1461-1464, October 1998. [bibtex-entry]


  42. Carole E. Nahum. Autofocusing using multiscale local correlation. In Proc. SPIE, volume 3497, pages 21-30, 1998. Keyword(s): SAR Processing, Autofocus, SAR Autofocus, MoComp, Motion Compensation, Map-Drift Autofocus, airborne radar, radar imaging, synthetic aperture radar, SAR data, SAR images, X-band airborne SAR system, arbitrary residual phase error, local-quadratic map-drift autofocus, phase error estimation, quadratic errors, small data blocks, uncompensated phase errors, Antennas, Azimuth, Bandwidth, Doppler effect, Measurement uncertainty, Radar, Trajectory, autofocus, map-drift, motion compensation, motion errors, synthetic aperture radar. [Abstract] [bibtex-entry]


  43. D.G. Thompson, J.S. Bates, D.V. Arnold, David G. Long, and A. Robertson. Range dependent phase gradient autofocus. In IEEE International Geoscience and Remote Sensing Symposium Proceedings, IGARSS '98, volume 5, pages 2634-2636, July 1998. Keyword(s): SAR Processing, Autofocus, Phase Gradient Autofocus, PGA, Range-dependent. [Abstract] [bibtex-entry]


  44. Chan Hian Lim and Yeo Tat Soon. Non-iterative spotlight SAR autofocusing using a modified phase-gradient approach. In Geoscience and Remote Sensing, 1997. IGARSS '97. 'Remote Sensing - A Scientific Vision for Sustainable Development'., 1997 IEEE International, volume 1, pages 484-486, August 1997. Keyword(s): SAR Processing, Autofocus, Phase Gradient Autofocus. [bibtex-entry]


  45. Shunhua Wang and Xiaotao Huang. Autofocus techniques for reducing phase errors in UWB-SAR. In IEEE National Aerospace and Electronics Conference, NAECON 1997, volume 2, pages 1009-1014, July 1997. Keyword(s): SAR Processing, Autofocus, Phase Gradient Autofocus, PGA, Residual Motion Errors, UWB SAR. [bibtex-entry]


  46. Ron S. Goodman, Sreenidhi Tummala, and Walter G. Carrara. Issues in Ultra-Wideband, Widebeam SAR Image Formation. In The Record of the 1995 IEEE Radar Conference, pages 479-485, May 1995. Keyword(s): SAR Processing, Range Migration Algorithm, Wavefront Reconstruction, Wavenumber Domain Algorithm, omega-k, RFI Suppression, Motion Compensation, Autofocus Techniques, Ultra-Wideband SAR, Sidelobe Control, P-Band, FOPEN, Airborne SAR. [Abstract] [bibtex-entry]


  47. Rolf Scheiber and Alberto Moreira. Extension of the Correlation Doppler Estimator for Determination of the Doppler Rate and for Resolving the PRF-Ambiguity. In Giorgio Franceschetti, editor, SAR Data Processing for Remote Sensing, volume SPIE 2316, pages 33-41, 1994. Keyword(s): SAR Processing, Doppler Centroid, Doppler Centroid Estimation, Clutterlock, Correlation Doppler Estimator, CDE, Sign Doppler Estimator, SDE, Doppler Ambiguity Resolver, DAR, Doppler Rate Estimation, Autofocus. [Abstract] [bibtex-entry]


  48. D.E. Wahl, C.V. Jakowatz, and P.A. Thompson. New approach to strip-map SAR autofocus. In Digital Signal Processing Workshop, 1994., 1994 Sixth IEEE, pages 53-56, October 1994. Keyword(s): SAR Processing, Autofocus, Phase Curvature Autofocus, Phase Gradient Autofocus. [Abstract] [bibtex-entry]


  49. P.H. Eichel, D.C. Ghiglia, C.V. Jakowatz, and D.E. Wahl. Phase Gradient Autofocus for SAR Phase Correction: Explanation and Demonstration of Algorithmic Steps. In Digital Signal Processing workshop, 1992. The, September 1992. Keyword(s): SAR Processing, Autofocus, Phase Gradient Autofocus. [bibtex-entry]


  50. Terry M. Calloway, Charles V. Jakowatz, Paul A. Thompson, and Paul H. Eichel. Comparison of synthetic-aperture radar autofocus techniques: phase gradient versus subaperture. In Franklin T. Luk, editor, , volume 1566, pages 353-364, 1991. SPIE. Keyword(s): SAR Processing, Autofocus, Comparison of Algorithms, Comparison of Autofocus Algorithms, Phase Gradient Algorithm, PGA, Subaperture-based Autofocus, subaperture correlation, look-misregistration autofocus, Map Drift. [bibtex-entry]


  51. Jorgen Dall. A new frequency domain autofocus algorithm for SAR. In IGARSS '91, Geoscience and Remote Sensing Symposium, volume 2, pages 1069 - 1072, 1991. Keyword(s): SAR Processing, Autofocus, SAC, Shift and Correlate Algorithm, Doppler Rate Estimation, Map Drift, Airborne SAR. [Abstract] [bibtex-entry]


  52. Daniel E. Wahl, Charles V. Jakowatz, Dennis C. Ghiglia, and Paul H. Eichel. Relationships between autofocus methods for SAR and self-survey techniques for SONAR. In Andrew G. Tescher, editor, , volume 1567, pages 32-40, 1991. SPIE. Keyword(s): SAR Processing, Autofocus, Phase Gradient Algorithm, PGA, Subaperture-based Autofocus, subaperture correlation, look-misregistration autofocus, Map Drift, SONAR. [bibtex-entry]


  53. Daniel E. Wahl, Paul H. Eichel, and Charles V. Jakowatz. Implementation of the phase-gradient algorithm. In Franklin T. Luk, editor, , volume 1348, pages 528-535, 1990. SPIE. Keyword(s): SAR Processing, Autofocus, Phase Gradient Algorithm, PGA. [bibtex-entry]


  54. P.H. Eichel, D.C. Ghiglia, C.V. Jakowatz, G.A. Mastin, L.A. Romero, and D.E. Wahl. Applications of phase gradient autofocus to aperture synthesis imaging. In Multidimensional Signal Processing Workshop, 1989., Sixth, pages 57-58, Sept. 1989. Keyword(s): SAR Processing, Autofocus, Phase Gradient Autofocus. [bibtex-entry]


  55. Ian G. Cumming, P. F. Kavanagh, and M. R. Ito. Resolving the Doppler Ambiguity for Spaceborne Synthetic Aperture Radar. In IGARSS '86, International Geoscience and Remote Sensing Symposium, volume 3, pages 1639-1643, 1986. Keyword(s): SAR Processing, Doppler Centroid, Doppler Centroid Estimation, Azimuth Look Correlation, Clutterlock, Doppler Ambiguity Resolver, DAR, Doppler Rate Estimation, Autofocus. [Abstract] [bibtex-entry]


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Last modified: Fri Feb 24 14:22:43 2023
Author: Othmar Frey, Earth Observation and Remote Sensing, Institute of Environmental Engineering, Swiss Federal Institute of Technology - ETH Zurich .

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