Comparison of Lagrangian drifter currents with satellite-derived estimates (AVISO/CMEMS, SWOT), using filters to isolate ageostrophic signals. Hanning filter improves buoy data; SWOT shows mesoscale skill, though meridional gains are limited by track asymmetry.

Julio Leonel Donfack, ICMPA UNESCO Chair & Toulouse III - Paul Sabatier University, Physical Oceanography and Applications, Cotonou, Benin