LG-Mod: A Modified Local Gradient (LG) Method to Retrieve SAR Sea Surface Wind Directions in Marine Coastal Areas

This paper describes a novel SAR wind direction estimation method based on the computation of local gradients over quasi-linear and quasi-periodic structures detected by SAR imagery. The method relies upon the standard LG method for the part relevant to the computation of the local gradients. The no...

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Bibliographic Details
Published in:Journal of sensors 2016-01, Vol.2016 (2016), p.1-7
Main Authors: De Carolis, Giacomo, Pasquariello, Guido, Adamo, Maria, Rana, Fabio M., Morelli, Sandra
Format: Article
Language:English
Subjects:
Automation
Buoys
Coastal
Computation
Statistics
Surface wind
Wind direction
Wind measurement
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Summary:This paper describes a novel SAR wind direction estimation method based on the computation of local gradients over quasi-linear and quasi-periodic structures detected by SAR imagery. The method relies upon the standard LG method for the part relevant to the computation of the local gradients. The novelty is that the dominant local wind direction and related accuracy are estimated using results derived from the Directional Statistics. The LG-Mod is validated against in situ coastal wind measurements provided by instrumented buoys with 63 ENVISAT ASAR images. Results show an overall agreement with RMSE values obtained for off-shore areas, but residual effects due to the complex phenomena occurring in the proximity of shoreline may degrade the performance when running in automated mode.
ISSN:1687-725X
1687-7268
DOI:10.1155/2016/9565208