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Provedor de dados:  ArchiMer
País:  France
Título:  Ocean doppler anomaly and ocean surface current from Sentinel 1 tops mode
Autores:  Johnsen, Harald
Nilsen, Vegard
Engen, Geir
Mouche, Alexis
Collard, Fabrice
Data:  2016
Ano:  2016
Palavras-chave:  Doppler effect
Sea surface
Sea measurements
Ocean temperature
Surface treatment
Resumo:  Processing and analysis of Doppler information from Sentinel 1A Interferometric Wide (IW) and Extra Wide (EW) modes are performed for assessing the capabilities of mapping ocean surface current field. Data from Agulhas (South-Africa) and Norwegian Coast are used in combination with numerical models, higher-order satellite products, and Lagrangian drifters. Results show strong Doppler signal and dynamics from coastal areas caused by a mixture of surface current and wind/wave induced drifts at a spatial resolution of around 2 km2 in IW mode and 4km2 in EW mode. Doppler values of up to 70 Hz are observed, corresponding to a surface drift velocity of 3.5 m/s. The Sentinel 1 retrieved surface current component is in reasonable agreement with the circulation models and drifter measurements. Surface current values up to 1.5 m/s are observed in the central Agulhas current, with a standard deviation of around 0.39 m/s with respect to Lagrangian drifters.
Tipo:  Text
Idioma:  Inglês
Editor:  Geoscience and Remote Sensing Symposium (IGARSS), 2016 IEEE International. 10-15 July 2016.pp. 3993 - 3996
Formato:  application/pdf
Direitos:  2016 IEEE


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