Roy Edgar Hansen

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Norwegian version of this page
Mobile phone +47 99413702
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Visiting address Gaustadalléen 23B Ole-Johan Dahls hus 0373 Oslo
Postal address Postboks 1080 Blindern 0316 Oslo

I am Adjunct Professor in acoustic imaging at the Department of Informatics, University of Oslo.

My primary work is as Principal Scientist at the Norwegian Defence Research Establishment (FFI).

Academic interests

My research interests are in synthetic aperture sonar, sonar signal processing, acoustic imaging, array signal processing and statistical signal processing.

Introduction to Synthetic Aperture Sonar

Introduction to Sonar

Synthetic Aperture Sonar Technology Review

Teaching

IN5340 Statistical signal processing

IN3015 Ultrasound imaging

IN5450 Array Signal Processing

 

Tags: synthetic aperture sonar, imaging, sonar, signal processing

Publications

  • Bryan, Oscar; Hansen, Roy Edgar; Haines, Tom S. F.; Warakagoda, Narada Dilp & Hunter, Alan Joseph (2022). Challenges of Labelling Unknown Seabed Munition Dumpsites from Acoustic and Optical Surveys: A Case Study at Skagerrak. Remote Sensing. ISSN 2072-4292. 14(11). doi: 10.3390/rs14112619. Full text in Research Archive
  • Thon, Stine Hverven; Hansen, Roy Edgar & Austeng, Andreas (2022). Point Detection in Ultrasound Using Prewhitening and Multilook Optimization. IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control. ISSN 0885-3010. 69(6), p. 2085–2097. doi: 10.1109/TUFFC.2022.3167923.
  • (2021). 3D Rendering of Shipwrecks from Synthetic Aperture Sonar. Proceedings of Meetings on Acoustics (POMA). ISSN 1939-800X. doi: 10.1121/2.0001483.
  • Thon, Stine Hverven; Hansen, Roy Edgar & Austeng, Andreas (2021). Detection of Point Scatterers in Medical Ultrasound. IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control. ISSN 0885-3010. doi: 10.1109/TUFFC.2021.3129619. Full text in Research Archive
  • (2021). Spatial coherence of speckle for repeat-pass synthetic aperture sonar micronavigation. IEEE Journal of Oceanic Engineering. ISSN 0364-9059. 46(4), p. 1330–1345. doi: 10.1109/JOE.2021.3060812. Full text in Research Archive
  • Blachet, Antoine; Austeng, Andreas; Aparicio, Joaquin; Hunter, Alan Joseph & Hansen, Roy Edgar (2021). Multibeam Echosounder With Orthogonal Waveforms: Feasibility and Potential Benefits. IEEE Journal of Oceanic Engineering. ISSN 0364-9059. doi: 10.1109/JOE.2021.3052568. Full text in Research Archive
  • Lønmo, Tor Inge Birkenes; Austeng, Andreas & Hansen, Roy Edgar (2020). Data-Driven Autocalibration for Swath Sonars. IEEE Journal of Oceanic Engineering. ISSN 0364-9059. doi: 10.1109/JOE.2020.3036184. Full text in Research Archive
  • (2019). Fusion Digital Terrain Models for Synthetic Aperture Sonar Interferometry. In Stahr, Fritz (Eds.), Proceedings of OCEANS 2019 MTS/IEEE SEATTLE. IEEE (Institute of Electrical and Electronics Engineers). ISSN 978-0-578-57618-3. doi: 10.23919/OCEANS40490.2019.8962838.
  • (2019). Through-the-sensor sharpness estimation for synthetic aperture sonar images. In Stahr, Fritz (Eds.), Proceedings of OCEANS 2019 MTS/IEEE SEATTLE. IEEE (Institute of Electrical and Electronics Engineers). ISSN 978-0-578-57618-3. doi: 10.23919/oceans40490.2019.8962812.
  • (2019). Comparison of synthetic aperture sonar images and optical images of UXOs from the Skagerrak chemical munitions dumpsite. Underwater Acoustics Conference & Exhibition (UACE). ISSN 2408-0195. p. 429–436.
  • Myers, Vincent; Quidu, Isabelle; Zerr, Benoit; Sæbø, Torstein Olsmo & Hansen, Roy Edgar (2019). Synthetic Aperture Sonar Track Registration With Motion Compensation for Coherent Change Detection. IEEE Journal of Oceanic Engineering. ISSN 0364-9059. doi: 10.1109/JOE.2019.2909960.
  • Lønmo, Tor Inge Birkenes; Austeng, Andreas & Hansen, Roy Edgar (2019). Improving Swath Sonar Water Column Imagery and Bathymetry With Adaptive Beamforming. IEEE Journal of Oceanic Engineering. ISSN 0364-9059. doi: 10.1109/JOE.2019.2926863.
  • Sternlicht, Daniel D.; Hayes, Michael P. & Hansen, Roy Edgar (2018). Seabed Mapping SAS: The First 50 Years of Synthetic Aperture Sonar Imaging Technology. Sea Technology. ISSN 0093-3651. 59(11), p. 10–14.
  • (2018). Investigating layover effects in cross-correlation based interferometry for synthetic aperture sonar, EUSAR 2018; 12th European Conference on Synthetic Aperture Radar. VDE Verlag GmbH. ISSN 978-3-8007-4636-1. p. 338–343.
  • Sæbø, Torstein Olsmo; Hansen, Roy Edgar & Myers, Vincent (2018). Comparison of co-registration techniques for synthetic aperture sonar images from repeated passes. In Heald, Gary (Eds.), Proceedings of 4th International Conference on Synthetic Aperture Sonar and Radar. Institute of Acoustics. ISSN 978-1-906913-30-4. p. 31–38.
  • Sternlicht, Daniel D.; Hayes, Michael P. & Hansen, Roy Edgar (2018). Historical development of seabed mapping synthetic aperture sonar. In Heald, Gary (Eds.), Proceedings of 4th International Conference on Synthetic Aperture Sonar and Radar. Institute of Acoustics. ISSN 978-1-906913-30-4. p. 1–10.
  • (2018). Challenges in Coregistration of Repeated Passes in Synthetic Aperture Sonar, EUSAR 2018; 12th European Conference on Synthetic Aperture Radar. VDE Verlag GmbH. ISSN 978-3-8007-4636-1. p. 344–349.
  • Hansen, Roy Edgar; Lyons, Anthony P.; Cook, Daniel A. & Sæbø, Torstein Olsmo (2018). Quantifying the negative impact of breaking internal waves on interferometric synthetic aperture sonar. In Heald, Gary (Eds.), Proceedings of 4th International Conference on Synthetic Aperture Sonar and Radar. Institute of Acoustics. ISSN 978-1-906913-30-4.
  • Ødegård, Øyvind; Hansen, Roy Edgar; Singh, Hanumant & Maarleveld, Thijs (2018). Archaeological use of Synthetic Aperture Sonar on deepwater wreck sites in Skagerrak. Journal of Archaeological Science. ISSN 0305-4403. 89, p. 1–13. doi: 10.1016/j.jas.2017.10.005. Full text in Research Archive
  • Synnes, Stig Asle Vaksvik; Hunter, Alan Joseph; Hansen, Roy Edgar; Sæbø, Torstein Olsmo; Callow, Hayden John & Van Vossen, Robbert (2017). Wideband synthetic aperture sonar backprojection with maximization of wave number domain support. IEEE Journal of Oceanic Engineering. ISSN 0364-9059. 42(4), p. 880–891. doi: 10.1109/JOE.2016.2614717.
  • Buskenes, Jo Inge; Hansen, Roy Edgar & Austeng, Andreas (2017). Low-Complexity Adaptive Sonar Imaging. IEEE Journal of Oceanic Engineering. ISSN 0364-9059. 42(1), p. 87–96. doi: 10.1109/JOE.2016.2565038.
  • Hansen, Roy Edgar; Lyons, Anthony P.; Cook, Daniel A. & Sæbø, Torstein Olsmo (2016). Detection of Internal Waves Using Multi-Aspect Processing in Synthetic Aperture Sonar. Electronic proceedings (EUSAR). ISSN 2197-4403.
  • (2016). Interferometry using phase slope estimation. Electronic proceedings (EUSAR). ISSN 2197-4403. 2016:7559359, p. 1–4.
  • Austeng, Andreas; Hansen, Roy Edgar & Jensen, Are Charles (2016). Micro-steered multilooking in synthetic aperture sonar imaging. Electronic proceedings (EUSAR). ISSN 2197-4403. 2016, p. 1–5.
  • Ødegård, Øyvind; Sørensen, Asgeir Johan; Hansen, Roy Edgar & Ludvigsen, Martin (2016). A new method for underwater archaeological surveying using sensors and unmanned platforms. IFAC-PapersOnLine. ISSN 2405-8963. 49(23), p. 486–493. doi: 10.1016/j.ifacol.2016.10.453. Full text in Research Archive
  • Blomberg, Ann Elisabeth Albright; Sæbø, Torstein Olsmo; Hansen, Roy Edgar; Pedersen, Rolf B. & Austeng, Andreas (2016). Automatic detection of marine gas seeps using an interferometric sidescan sonar. IEEE Journal of Oceanic Engineering. ISSN 0364-9059. 42(3), p. 590–602. doi: 10.1109/JOE.2016.2592559.
  • Øigård, Tor Arne; Hanssen, Alfred & Hansen, Roy Edgar (2015). The Multivariate Normal Inverse Gaussian distribution: EM-estimation and analysis of synthetic aperture sonar data. European Signal Processing Conference. ISSN 2076-1465. 06-10-September-2004, p. 1433–1436. doi: 10.1109/icassp.2002.5744895. Full text in Research Archive
  • Ludvigsen, Martin; Thorsnes, Terje; Hansen, Roy Edgar; Sørensen, Asgeir Johan; Johnsen, Geir & Lågstad, Petter Arthur [Show all 8 contributors for this article] (2015). Underwater vehicles for environmental management in coastal areas. In IEEE, . (Eds.), OCEANS 2015 - Genova. IEEE conference proceedings. ISSN 978-1-4799-8736-8. doi: 10.1109/OCEANS-Genova.2015.7271728.
  • Denny, Alden Ross; Sæbø, Torstein Olsmo; Hansen, Roy Edgar & Pedersen, Rolf B. (2015). The use of synthetic aperture sonar to survey seafloor massive sulfide deposits. Journal of Ocean Technology. ISSN 1718-3200. 10(1), p. 48–65.
  • Geilhufe, Marc; Connors, Warren A.; Synnes, Stig Asle Vaksvik; Midtgaard, Øivind; Sæbø, Torstein Olsmo & Hansen, Roy Edgar (2015). Assessment of mine hunting performance evaluation parameters across multiple side-looking sonar systems and frequencies, OCEANS'15 MTS/IEEE Washington, Washington DC, 19-22 October, 2015. IEEE conference proceedings. ISSN 978-0-933957-43-5. doi: 10.23919/oceans.2015.7404535.
  • Lønmo, Tor Inge Birkenes; Austeng, Andreas & Hansen, Roy Edgar (2015). Interference rejection for sonars via low,complexity adaptive beamforming. Proceedings of the Institute of Acoustics. ISSN 1478-6095. 37(1), p. 207–214.
  • Lønmo, Tor Inge Birkenes; Austeng, Andreas & Hansen, Roy Edgar (2015). Low Complexity Adaptive Beamforming Applied to Sonar Imaging (Invited). Underwater Acoustics Conference & Exhibition (UACE). ISSN 2408-0195. p. 653–658. Full text in Research Archive
  • Landmark, Knut; Solberg, Anne H Schistad; Albregtsen, Fritz; Austeng, Andreas & Hansen, Roy Edgar (2015). A Radon-Transform-Based Image Noise Filter - With Applications to Multibeam Bathymetry. IEEE Transactions on Geoscience and Remote Sensing. ISSN 0196-2892. 53(11), p. 6252–6273. doi: 10.1109/TGRS.2015.2436380.
  • Hansen, Roy Edgar; Lyons, Anthony P.; Sæbø, Torstein Olsmo; Callow, Hayden John & Cook, Daniel A. (2015). The Effect of Internal Wave-Related Features on Synthetic Aperture Sonar. IEEE Journal of Oceanic Engineering. ISSN 0364-9059. 40(3), p. 621–631. doi: 10.1109/JOE.2014.2340351.
  • (2014). Performance Assessment Tool for AUV Based Mine Hunting. In Heald, Gary (Eds.), International Conference on Synthetic Aperture Sonar and Synthetic Aperture Radar. Institute of Acoustics. ISSN 978-1-63439-383-6. p. 118–127.
  • Sæbø, Torstein Olsmo; Hansen, Roy Edgar & Austeng, Andreas (2014). Synthetic Aperture Sonar Tomography: A Preliminary Study. In NN, . (Eds.), EUSAR 2014; 10th European Conference on Synthetic Aperture Radar; Proceedings of. VDE Verlag GmbH. ISSN 978-3-8007-3607-2. p. 1389–1392.
  • Geilhufe, Marc; Dugelay, Samantha; Synnes, Stig Asle Vaksvik; Sæbø, Torstein Olsmo; Midtgaard, Øivind & Hansen, Roy Edgar (2014). Comparative study of frequency dependency in high resolution sonar imagery from the MANEX'13 sea trials. In Heald, Gary (Eds.), Proceedings of International Conference Synthetic Aperture Sonar and Synthetic Aperture Radar. Institute of Acoustics. ISSN 978-1-906913-17-5. p. 191–200.
  • Landmark, Knut; Solberg, Anne H Schistad; Austeng, Andreas & Hansen, Roy Edgar (2014). Bayesian seabed classification using angle-dependent backscatter data from multibeam echo sounders. IEEE Journal of Oceanic Engineering. ISSN 0364-9059. 39(4), p. 724–739. doi: 10.1109/JOE.2013.2281133.
  • (2013). Synthetic Aperture Sonar Technology Review. Marine Technology Society journal. ISSN 0025-3324. 47(5), p. 117–127. doi: 10.4031/MTSJ.47.5.5.

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  • Rindal, Ole Marius Hoel; Näsholm, Sven Peter; Hansen, Roy Edgar & Austeng, Andreas (2022). Compensating Dynamic Range Alterations from Adaptive Beamforming using Histogram Matching.
  • Rindal, Ole Marius Hoel; Näsholm, Sven Peter; Hansen, Roy Edgar & Austeng, Andreas (2022). Image Enhancement Using Capon Minimum Variance Adaptive Beamforming in Synthetic Aperture Sonar.
  • Austeng, Andreas; Näsholm, Sven Peter; Hansen, Roy Edgar & Rindal, Ole Marius Hoel (2022). Spatial Aperture Coherence with Synthetic Transmit Focusing in SAS.
  • Gereb, Gabor; Hansen, Roy Edgar; Lønmo, Tor Inge Birkenes; Näsholm, Sven Peter & Austeng, Andreas (2022). Underwater pipeline detection and localisation using multibeam echo sounder in a resolution limited case.
  • Gereb, Gabor; Hansen, Roy Edgar; Lønmo, Tor Inge Birkenes & Austeng, Andreas (2022). PhD project: Adaptive beamforming in underwater detection and estimation problems.
  • (2021). 3D rendering of shipwrecks from synthetic aperture sonar.
  • La Manna, Nicolas; Lyons, Anthony P. & Hansen, Roy Edgar (2021). The effect of internal waves on synthetic aperture sonar resolution.
  • (2020). Backscatter Features for Estimating Synthetic Aperture Sonar Bathymetry.
  • (2020). Backscatter Features for Estimating Synthetic Aperture Sonar Bathymetry. OCEANS. ISSN 0197-7385.
  • (2020). Estimating the spatial coherence of narrowband underwater acoustic signals.
  • (2020). Estimating the spatial coherence of narrowband underwater acoustic signals. OCEANS. ISSN 0197-7385.
  • (2020). Estimating the spatial coherence of narrowband underwater acoustic signals.
  • Pate, David J.; Cook, Daniel A.; Lyons, Anthony P. & Hansen, Roy Edgar (2019). Characterization of internal waves in SAS imagery via ray tracing.
  • (2019). Fusion Digital Terrain Models for Synthetic Aperture Sonar Interferometry.
  • (2019). Comparison of synthetic aperture sonar images and optical images of UXOs from the Skagerrak chemical munitions dumpsite.
  • (2019). Through-the-sensor sharpness estimation for synthetic aperture sonar images.
  • Blachet, Antoine; Plets, Ruth; Sacchetti, Fabio; Austeng, Andreas; Hunter, Alan, J & Hansen, Roy Edgar (2019). MBES DATA SIMULATION: ASSESSMENT BY DIRECT COMPARISON WITH A HIGH-RESOLUTION MULTI-SETTINGS WRECK SURVEY.
  • (2019). Mapping the ocean floor in extreme resolution using interferometric synthetic aperture sonar. Proceedings of Meetings on Acoustics (POMA). ISSN 1939-800X. 38(1), p. 1–10. doi: 10.1121/2.0001058.
  • (2019). Mapping the ocean floor in extreme resolution using interferometric synthetic aperture sonar.
  • (2018). High Resolution Imaging And Mapping Of The Seabed Using Synthetic Aperture Sonar.
  • (2018). Exploring the Ocean Floor with Synthetic Aperture Sonar.
  • Pate, David J.; Cook, Daniel A.; Lyons, Anthony P. & Hansen, Roy Edgar (2018). Characterization of internal waves in synthetic aperture sonar imagery via ray tracing.
  • Lyons, Anthony P.; Olson, Derek R. & Hansen, Roy Edgar (2018). Quantifying the effect of random roughness on synthetic aperture sonar image statistics.
  • Blachet, Antoine; Austeng, Andreas; Prieur, Fabrice Jean Gabriel & Hansen, Roy Edgar (2018). Multibeam echosounder survey simulation.
  • (2018). Investigating layover effects in cross-correlation based interferometry for synthetic aperture sonar.
  • (2018). Challenges in Coregistration of Repeated Passes in Synthetic Aperture Sonar.
  • Myers, Vincent; Sæbø, Torstein Olsmo & Hansen, Roy Edgar (2018). Comparison of co-registration techniques for synthetic aperture sonar images from repeated passes.
  • Sternlicht, Daniel D.; Hayes, Michael P. & Hansen, Roy Edgar (2018). Historical development of seabed mapping synthetic aperture sonar.
  • Hansen, Roy Edgar; Lyons, Anthony P.; Cook, Daniel A. & Sæbø, Torstein Olsmo (2018). Quantifying the negative impact of breaking internal waves on interferometric synthetic aperture sonar.
  • (2017). Synthetic Aperture Sonar Interferometry Mapping of the Seabed.
  • Austeng, Andreas; Rodriguez-Molares, Alfonso & Hansen, Roy Edgar (2017). Performance of coherence based adaptive sonar beamformers.
  • (2017). Depth estimation of water column objects using interferometric synthetic aperture sonar.
  • Myers, Vincent; Quidu, I.; Sæbø, Torstein Olsmo; Hansen, Roy Edgar & Zerr, Benoit (2017). Computing navigation corrections for co-registration of repeat-pass synthetic aperture sonar images.
  • Lyons, Anthony P.; Hansen, Roy Edgar; Prater, James; Connors, Warren A.; Rice, Glen & Pailhas, Yan (2017). Internal wave effects on seafloor imagery and bathymetry estimates.
  • (2017). Synthetic aperture sonar interferometry for detailed seabed mapping: Performance considerations.
  • Blachet, Antoine; Lønmo, Tor Inge Birkenes; Austeng, Andreas; Prieur, Fabrice Jean Gabriel; Hunter, Alan, J & Hansen, Roy Edgar (2017). SONAR DATA SIMULATION WITH APPLICATION TO MULTIBEAM ECHO SOUNDERS.
  • Lønmo, Tor Inge Birkenes; Austeng, Andreas & Hansen, Roy Edgar (2017). Phase Detections with Low Complexity Adaptive Beamforming on Swath Sonars.
  • (2017). Local probability-based phase unwrapping for synthetic aperture sonar interferometry.
  • (2017). Mapping unexploded ordnance (UXO) using interferometric synthetic aperture sonar.
  • Geilhufe, Marc; Voss, Hauke; Hansen, Roy Edgar; Midtgaard, Øivind; Synnes, Stig Asle Vaksvik & Sæbø, Torstein Olsmo (2017). Towards automated HF sidescan sonar performance estimation.
  • Lyons, Anthony P.; Olson, Derek R. & Hansen, Roy Edgar (2016). Quantifying the effect of random seafloor roughness on high-frequency synthetic aperture sonar image statistics.
  • (2016). In-situ performance assessment for high frequency seabed imaging sidescan sonar.
  • Hansen, Roy Edgar; Lyons, Anthony P.; Cook, Daniel A. & Sæbø, Torstein Olsmo (2016). Detection of Internal Waves Using Multi-Aspect Processing in Synthetic Aperture Sonar.
  • (2016). Interferometry using phase slope estimation.
  • Ludvigsen, Martin; Thorsnes, Terje; Hansen, Roy Edgar; Sørensen, Asgeir Johan; Johnsen, Geir & Lågstad, Petter Arthur [Show all 7 contributors for this article] (2015). Underwater vehicles for environmental management in coastal areas.
  • (2015). Aspect-dependent scattering in widebeam synthetic aperture sonar.
  • (2015). Using an interferometric synthetic aperture sonar to inspect the Skagerrak World War II chemical munitions dump site.
  • Denny, Alden Ross; Pedersen, Rolf B.; Hansen, Roy Edgar & Sæbø, Torstein Olsmo (2014). Synthetic aperture sonar imaging of shallow hydrothermal systems on the northern Kolbeinsey Ridge.
  • Denny, Alden Ross; Pedersen, Rolf B. & Hansen, Roy Edgar (2014). Techniques for importing and visualizing HiSAS cm-scale bathymetry.
  • Denny, Alden Ross; Pedersen, Rolf B. & Hansen, Roy Edgar (2014). High-resolution imaging of seafloor hydrothermal systems using synthetic aperture sonar.
  • Geilhufe, Marc; Dugelay, Samantha; Synnes, Stig Asle Vaksvik; Sæbø, Torstein Olsmo; Midtgaard, Øivind & Hansen, Roy Edgar (2014). Comparative study of frequency dependency in high resolution sonar imagery from the MANEX'13 sea trials.
  • (2014). Performance assessment tool for AUV based mine hunting.
  • Callow, Hayden John; Hagen, Per Espen & Hansen, Roy Edgar (2014). Operating frequency trade-offs in the design of high resolution synthetic aperture sonars for small platforms.
  • Sæbø, Torstein Olsmo; Hansen, Roy Edgar & Austeng, Andreas (2014). Synthetic Aperture Sonar Tomography: A Preliminary Study.
  • Blomberg, Ann Elisabeth Albright; Austeng, Andreas; Hansen, Roy Edgar & Pedersen, Rolf B. (2014). Alternative SAS processing for gas seep detection.
  • (2014). Change detection in topographic structures using interferometric synthetic aperture sonar.
  • Lyons, Anthony P.; Hansen, Roy Edgar; Sæbø, Torstein Olsmo & Callow, Hayden John (2013). Synthetic aperture sonar imaging of breaking internal wave structures.
  • (2013). Ultra wideband SAS imaging.
  • Austeng, Andreas; Callow, Hayden John; Larsen, yngvar & Hansen, Roy Edgar (2013). Speckle Reduction in Synthetic Aperture Sonar Images Using Thomson’s Multitaper Approach.
  • Lønmo, Tor Inge Birkenes; Austeng, Andreas; Hansen, Roy Edgar & Tichy, Frank (2020). Adaptive Beamforming and Autocalibration for Swath Sonars. Universitetet i Oslo. ISSN 1501-7710. Full text in Research Archive
  • Ødegård, Øyvind; Sørensen, Asgeir Johan; Johnsen, Geir; Ludvigsen, Martin; Hansen, Roy Edgar & Maarleveld, Thijs (2018). Towards Autonomous Operations and Systems in Marine Archaeology. NTNU. ISSN 978-82-326-3196-4. 2018(IMT-12).

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Published Nov. 4, 2010 1:56 PM - Last modified Oct. 27, 2021 5:02 PM

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