Browsing by Author "Callow, Hayden John"

Now showing items 1-5 of 5

    • 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, ...

    • The Effect of Internal Wave-Related Features on Synthetic Aperture Sonar 

      Hansen, Roy Edgar; Lyons, Anthony P.; Sæbø, Torstein Olsmo; Callow, Hayden John; Cook, Daniel A. (2015)
      In October 2012, the Centre for Maritime Research and Experimentation (CMRE, La Spezia, Italy) conducted trials from the NATO research vessel (RV) Alliance, off Elba Island, Italy. During this trial, data were collected ...

    • Interferometric Synthetic Aperture Sonar in Pipeline Inspection 

      Hansen, Roy Edgar; Sæbø, Torstein Olsmo; Callow, Hayden John; Hagen, Per Espen (2010-10-14)
      Accurate and reliable inspection of subsea pipelinestraditionally requires the use of multiple sensors, which againhave different requirements for range and geometry. This makespipeline inspection a time consuming and ...

    • A new approach to high-resolution seafloor mapping 

      Callow, Hayden John; Hagen, Per Espen; Hansen, Roy Edgar; Sæbø, Torstein Olsmo; Pedersen, Rolf B. (2012)

    • 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 ...