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Título: | Assessment of the azimuth wavelength cut-off dependence on the ocean state and on the surface wind speed for Sentinel-1 SAR images |
Autor: | Grieco, Giuseppe CSIC ORCID; Lin, Wenming CSIC ORCID; Migliaccio, Maurizio; Portabella, Marcos CSIC ORCID | Fecha de publicación: | 2016 | Editor: | Institute of Electrical and Electronics Engineers | Citación: | 2016 IEEE International Geoscience and Remote Sensing Symposium, Proceedings: 4615-4618 (2016) | Resumen: | The empirical dependence of the azimuth wavelength cut-off on the significant wave height and on the wind speed have been studied. The azimuth cut-off is estimated on the fitting of a Gaussian function to the azimuth autocorrelation function of the radar cross section. The feasibility of estimating the significant wave height and/or the wind speed has been investigated as well. We use SAR images acquired by the European Sentinel 1 from the beginning of November 2014 to the end of April 2015 co-located with the scatterometer winds acquired by the Chinese sensor HSCAT and the significant wave height from ECMWF forecasts. The correlation between the azimuth cut-off and the significant wave height is rather strong. A linear geophysical model function is fitted in order to estimate it. The dependence on the wind speed is secondary and becomes remarkable only when the sea state is fully developed. A significant wave height retrieval exercise is proposed and the results are compared with the buoy measurements of the National Data Buoy Center (NDBC) network | Descripción: | 2016 IEEE International Geoscience and Remote Sensing Symposium (IGARSS), Advancing the understanding of our living planet, 10-15 July 2016, Beijing, China.-- 4 pages | Versión del editor: | https://doi.org/10.1109/IGARSS.2016.7730204 | URI: | http://hdl.handle.net/10261/144132 | DOI: | 10.1109/IGARSS.2016.7730204 | Identificadores: | isbn: 978-1-5090-3332-4 e-issn: 2153-7003 |
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