Ocean doppler anomaly and ocean surface current from Sentinel 1 tops mode
| Type | Proceedings paper | ||||||||||||
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| Date | 2016 | ||||||||||||
| Language | English | ||||||||||||
| Author(s) | Johnsen Harald1, Nilsen Vegard1, Engen Geir1, Mouche Alexis 2, Collard Fabrice3 |
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| Affiliation(s) | 1 : Northern Research Institute, Box 6434, N-9294 Tromsoe, Norway 2 : Laboratoire d'Ocanographie Spatiale - Ifremer, 29280 Plouzane, France 3 : OceanDataLab, 29280 Locmaria Plouzane, France |
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| Meeting | Geoscience and Remote Sensing Symposium (IGARSS), 2016 IEEE International. 10-15 July 2016 | ||||||||||||
| Source | Geoscience and Remote Sensing Symposium (IGARSS), 2016 IEEE International. 10-15 July 2016.pp. 3993 - 3996 | ||||||||||||
| DOI | 10.1109/IGARSS.2016.7730038 | ||||||||||||
| Keyword(s) | Doppler effect, Sea surface, Sea measurements, Ocean temperature, Surface treatment, Antennas | ||||||||||||
| Abstract | 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. | ||||||||||||
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