Using Sentinel-1 Ocean Data for Mapping Sea Surface Currents Along the Southern Norwegian Coast
Paper in proceedings, 2019

In this paper, the capability of Sentinel-1 data to map ocean surface currents in the Skagerrak Sea, with a focus on the Norwegian Coastal Current (NCC), is investigated. Post-processing methods for removing artefacts in the data and improving of the geophysical interpretation are suggested. Scalloping is one major artefact, which significantly degrades the quality of the velocity maps. Two methods, in spatial and spectral domain, for correcting this effect are proposed. It is also found that the radial velocity provided in the Sentinel-1 ocean data is biased, hence land is used as a reference to correct for the absolute and inter-beam bias. Finally, the retrieved (corrected) velocity is compared to a regional ocean circulation model (ROMS). It is shown that there is a good agreement between the ocean model and the retrieved velocity with values of ≈ 0.8 m/s in the core of the NCC.

Sentinel-1

SAR Doppler centroid

Ocean surface currents

SAR radial velocity

Author

Anis Elyouncha

Chalmers, Space, Earth and Environment, Microwave and Optical Remote Sensing

Leif Eriksson

Chalmers, Space, Earth and Environment, Microwave and Optical Remote Sensing

Harald Johnsen

Northern Research Institute (Norut)

Lars Ulander

Chalmers, Space, Earth and Environment, Microwave and Optical Remote Sensing, Radar Remote Sensing

International Geoscience and Remote Sensing Symposium (IGARSS)

8058-8061

IEEE International Geoscience and Remote Sensing Symposium (IGARSS)
Yokohama, Japan,

Understanding ocean surface dynamics with satelite data

Swedish National Space Board, 2015-01-01 -- 2019-03-31.

Subject Categories

Remote Sensing

Earth and Related Environmental Sciences

DOI

10.1109/IGARSS.2019.8898468

ISBN

9781538691540

More information

Latest update

12/7/2020