Blar i Geophysical Institute på forfatter "Kudryavtsev, Vladimir"

Viser treff 1-5 av 5

    • Direct ocean surface velocity measurements from space: Improved quantitative interpretation of Envisat ASAR observations 

      Johannessen, Johnny A.; Chapron, B.; Collard, F.; Kudryavtsev, Vladimir; Mouchet, A.; Akimov, D.; Dagestad, Knut-Frode (Peer reviewed; Journal article, 2008-11-29)
      Previous analysis of Advanced Synthetic Aperture Radar (ASAR) signals collected by ESA’s Envisat has demonstrated a very valuable source of high-resolution information, namely, the line-of-sight velocity of the moving ocean ...

    • On effect of wave breaking on short wind waves 

      Kudryavtsev, Vladimir; Johannessen, Johnny A. (Peer reviewed; Journal article, 2004-10)
      The paper presents an attempt to estimate short wave generation by wave breaking. A breaking wave crest disturbs the surface and generates sub-surface turbulence. The locally disturbed area further disperses and feeds short ...

    • On radar imaging of current features: 1. Model and comparison with observations 

      Kudryavtsev, Vladimir; Akimov, D.; Johannessen, Johnny A.; Chapron, B. (Journal article, 2005-07-22)
      A new radar imaging model of ocean current features is proposed. The simulated normalized radar cross section (NRCS) takes into account scattering from ‘‘regular’’ surfaces (by means of resonant Bragg scattering and specular ...

    • On radar imaging of current features: 2. Mesoscale eddy and current front detection 

      Johannessen, Johnny A.; Kudryavtsev, Vladimir; Akimov, D.; Eldevik, Tor; Winther, Nina Gjerde; Chapron, B. (Peer reviewed; Journal article, 2005-07-22)
      The surface signatures of meandering fronts and eddies have been regularly observed and documented in synthetic aperture radar (SAR) images. Wave-current interactions, the suppression of short wind waves by natural film, ...

    • On the Use of Dual Co-Polarized Radar Data to Derive a Sea Surface Doppler Model - Part 2: Simulation and Validation 

      Fan, Shengren; Zhang, Biao; Moiseev, Artem; Kudryavtsev, Vladimir; Johannessen, Johnny Andre; Chapron, Bertrand (Journal article; Peer reviewed, 2023)
      The Doppler shift obtained from synthetic aperture radar (SAR) measurements comprises the combined contribution to the radial motion of the ocean surface induced by the sea state (wind waves and swell) and underlying surface ...