Katrin Hessner

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A method to estimate sea surface elevation maps from marine radar image sequences is presented. This method is the extension of an existing inverse modeling technique to derive wave spectra from marine radar images, which assumes linear wave theory with temporal stationarity and spatial homogeneity of the observed sea surface elevation. The proposed(More)
The measurement of ocean waves and surface currents with a nautical radar is based on the spatial and temporal structure analysis of radar images of the sea surface. These radar images are generated by the interaction of HH-polarized electromagnetic waves with the sea surface ripples at grazing incidence. In these radar images the sea surface is visible as(More)
to use figures, tables, and brief excerpts from this work in scientific and educational works is hereby granted provided that the source is acknowledged. Any use of material in this work that is determined to be " fair use " under Section 107 of the U.S. Copyright Act September 2010 Page 2 or that satisfies the conditions specified in Section 108 of the(More)
Images generated by a common ship's navigation radar contain wave information. Digital techniques allow rapid acquisition and processing of such data. Since the radar is looking at extreme grazing angles, effects like diffraction and shadowing dominate the backscatter mechanism. As a consequence, no reliable backscatter model is available that allows(More)
This work presents the estimation of wave field properties derived from X-band marine radar measurements taken close to coastal locations, where the wave fields are affected by the finite water depth conditions. The work is focused on the detection of individual waves and their related characteristics, such as the estimation of the local and instantaneous(More)
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