Measuring currents, ice drift, and waves from space : the Sea surface KInematics Multiscale monitoring (SKIM) concept Ardhuin F. auteur aut IRD Aksenov Y. auteur aut IRD Benetazzo A. auteur aut IRD Bertino L. auteur aut IRD Brandt P. auteur aut IRD Caubet E. auteur aut IRD Chapron B. auteur aut IRD Collard F. auteur aut IRD Cravatte Sophie auteur aut IRD Delouis J. M. auteur aut IRD Dias F. auteur aut IRD Dibarboure G. auteur aut IRD Gaultier L. auteur aut IRD Johannessen J. auteur aut IRD Korosov A. auteur aut IRD Manucharyan G. auteur aut IRD Menemenlis D. auteur aut IRD Menendez M. auteur aut IRD Monnier G. auteur aut IRD Mouche A. auteur aut IRD Nouguier F. auteur aut IRD Nurser G. auteur aut IRD Rampal P. auteur aut IRD Reniers A. auteur aut IRD Rodriguez E. auteur aut IRD Stopa J. auteur aut IRD Tison C. auteur aut IRD Ubelmann C. auteur aut IRD van Sebille E. auteur aut IRD Xie J. P. auteur aut IRD text journalArticle eng text/pdf reformatted digital access We propose a satellite mission that uses a near-nadir Ka-band Doppler radar to measure surface currents, ice drift and ocean waves at spatial scales of 40 km and more, with snapshots at least every day for latitudes 75 to 82 degrees, and every few days for other latitudes. The use of incidence angles of 6 and 12 degrees allows for measurement of the directional wave spectrum, which yields accurate corrections of the wave-induced bias in the current measurements. The instrument's design, an algorithm for current vector retrieval and the expected mission performance are presented here. The instrument proposed can reveal features of tropical ocean and marginal ice zone (MIZ) dynamics that are inaccessible to other measurement systems, and providing global monitoring of the ocean mesoscale that surpasses the capability of today's nadir altimeters. Measuring ocean wave properties has many applications, including examining wave-current interactions, air-sea fluxes, the transport and convergence of marine plastic debris and assessment of marine and coastal hazards. specialized 126 032 Ocean Science 14 3 337-354 2018 1812-0784 https://www.documentation.ird.fr/hor/fdi:010072867 10.5194/os-14-337-2018 1812-0784 [F B010072867] https://www.documentation.ird.fr/hor/fdi:010072867 https://horizon.documentation.ird.fr/exl-doc/pleins_textes/divers18-05/010072867.pdf IRD - Base Horizon / Pleins textes 2018-06-01 2023-07-11 fdi:010072867 fre