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Some results of studying of ocean surface waves spectral characteristics on the base of ENVISAT ASAR data
Vitaly Sychev(1), Lubava Badak(1) and Vladimir Kudryavtsev(1) (1) Russian State Hydrometeorological University, 98, Malookhtinsky prospect, 195196, St.Petersburg, Russian Federation
Abstract
Detailed studying of the ocean surface wave spectrum was made on the base of several images of ENVISAT ASAR for the Gulf of Biscay and the English Channel.
An algorithm used is based on the analysis of the main physical mechanisms of formation of ocean surface waves (tilt modulation, hydrodynamic modulation, velocity bunching modulation) at SAR images. Methods for digital signal processing for space images filtration were used for the analysis of spatial distribution of main wind wave characteristics.
The results have shown possibility of practical use of the algorithm for generating spectrums of ocean surface waves based on SAR data. The capabilities and limitations in terms of spatial resolution and quality of sea state description are discussed and demonstrated on a few examples of SAR datasets.
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