Browsing by Author "Synnes, Stig Asle Vaksvik"

Now showing items 1-6 of 6

    • 3D Rendering of Shipwrecks from Synthetic Aperture Sonar 

      Lorentzen, Ole Jacob; Hansen, Roy Edgar; Sæbø, Torstein Olsmo; Synnes, Stig Asle Vaksvik; Geilhufe, Marc (2021-10-25)
      Synthetic aperture sonar (SAS) bathymetric mapping provides centimeter-scale horizontal resolution of the seafloor. Typically, SAS data has been visualized as 2D images or gridded 2.5D surfaces, but it can also be plotted ...

    • Calibration target for extraction of frequency dependency in synthetic aperture sonar 

      Synnes, Stig Asle Vaksvik; Lorentzen, Ole J. (2019-12-03)
      Synthetic aperture sonar (SAS) can provide high resolution images of the seafloor backscatter. A current research topic is whether wider bandwidth and lower frequencies can support better discrimination of different ...

    • Challenges in Seafloor Imaging and Mapping With Synthetic Aperture Sonar 

      Hansen, Roy Edgar; Callow, Hayden John; Sæbø, Torstein Olsmo; Synnes, Stig Asle Vaksvik (2011)
      Synthetic aperture sonar (SAS) is emerging as an imaging technology that can provide centimeter resolution over hundreds-of-meter range on the seafloor. Although the principle of SAS has been known for more than 30 years, ...

    • Spatial coherence of speckle for repeat-pass synthetic aperture sonar micronavigation 

      Synnes, Stig Asle Vaksvik; Hansen, Roy Edgar; Sæbø, Torstein Olsmo (2021-03-31)
      Accurate positioning of autonomous underwater vehicles is a major challenge. The long-term drift is problematic if global position updates are not available, and for applications such as repeat-pass interferometry and ...

    • Wideband Interferometry in Synthetic Aperture Sonar 

      Sæbø, Torstein Olsmo; Synnes, Stig Asle Vaksvik; Hansen, Roy Edgar (2013)
      Synthetic aperture sonar (SAS) interferometry can provide very high resolution images and topographic maps of the seafloor over large swaths. Processing of interferometric data to retrieve reliable depth estimates of the ...

    • Wideband Synthetic Aperture Sonar Back Projection with Maximization of Wave Number Domain Support 

      Synnes, Stig Asle Vaksvik; Hunter, Alan Joseph; Hansen, Roy Edgar; Sæbø, Torstein Olsmo; Callow, Hayden John; Van Vossen, Robbert; Austeng, Andreas (2017)
      Wideband and widebeam synthetic aperture sonar (SAS) can provide information on the frequency- and aspect-dependent scattering in a scene. We suggest an approach to predict the quality of the sensor data over the available ...