FN Archimer Export Format PT C TI Ocean doppler anomaly and ocean surface current from Sentinel 1 tops mode BT AF Johnsen, Harald Nilsen, Vegard Engen, Geir MOUCHE, Alexis COLLARD, Fabrice AS 1:1;2:1;3:1;4:2;5:3; FF 1:;2:;3:;4:PDG-ODE-LOPS-SIAM;5:; C1 Northern Research Institute, Box 6434, N-9294 Tromsoe, Norway Laboratoire d'Ocanographie Spatiale - Ifremer, 29280 Plouzane, France OceanDataLab, 29280 Locmaria Plouzane, France C2 NORUT, NORWAY IFREMER, FRANCE OCEANDATALAB, FRANCE SI BREST SE PDG-ODE-LOPS-SIAM UM LOPS IN WOS Ifremer jusqu'en 2018 copubli-france copubli-europe UR https://archimer.ifremer.fr/doc/00356/46713/46589.pdf LA English DT Proceedings paper DE ;Doppler effect;Sea surface;Sea measurements;Ocean temperature;Surface treatment;Antennas AB 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. PY 2016 CT Geoscience and Remote Sensing Symposium (IGARSS), 2016 IEEE International. 10-15 July 2016.pp. 3993 - 3996 DI 10.1109/IGARSS.2016.7730038 ID 46713 ER EF