Ocean Sci., 16, 1–32, 2020 https://doi.org/10.5194/os-16-1-2020 © Author(s) 2020. This work is distributed under the Creative Commons Attribution 4.0 License. Measuring ocean total surface current velocity with the KuROS and KaRADOC airborne near-nadir Doppler radars: a multi-scale analysis in preparation for the SKIM mission Louis Marié1, Fabrice Collard2, Frédéric Nouguier1, Lucia Pineau-Guillou1, Danièle Hauser3, François Boy4, Stéphane Méric5, Peter Sutherland1, Charles Peureux1, Goulven Monnier6, Bertrand Chapron1, Adrien Martin7, Pierre Dubois8, Craig Donlon9, Tania Casal9, and Fabrice Ardhuin1 1Laboratoire d’Océanographie Physique et Spatiale (LOPS), UMR 6523, Univ. Brest, CNRS, Ifremer, IRD, Brest, France 2OceanDataLab, Locmaria Plouzané, TS1 France 3CNRS, Univ. Versailles St Quentin, Sorbonne Université, LATMOS, TS2 France 4 TS3 CNES, Toulouse, France 5Institut d’Électronique et de Télécommunication de Rennes (IETR), UMR CNRS 6164, Rennes, France 6 TS4 SCALIAN, Rennes, France 7 TS5 NOC, Southampton, UK 8 TS6 CLS, Ramonville St Agne, France 9 TS7 ESA, Nordwijk, the Netherlands Correspondence: Louis Marié (
[email protected]) Received: 24 June 2019 – Discussion started: 27 August 2019 Revised: 4 July 2020 – Accepted: 5 August 2020 – Published: Abstract. TS8 CE1 CE2 Surface currents are poorly known locity in a side-looking configuration, with a horizontal res- over most of the world’s oceans. Satellite-borne Doppler olution of about 5 to 10 m along the line of sight and inte- wave and current scatterometers (DWaCSs) are among the grated in the perpendicular direction over the real-aperture proposed techniques to fill this observation gap. The Sea 3 dB footprint diameter (about 580 m).