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Ocean doppler anomaly and ocean surface current from Sentinel 1 tops mode ArchiMer
Johnsen, Harald; Nilsen, Vegard; Engen, Geir; Mouche, Alexis; Collard, Fabrice.
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...
Tipo: Text Palavras-chave: Doppler effect; Sea surface; Sea measurements; Ocean temperature; Surface treatment; Antennas.
Ano: 2016 URL:
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