Ocean mesoscale eddies are the most energetic component of the ocean dynamics, important for the horizontal fluxes of energy, momentum, and tracers such as heat, carbon and nutrients. Today, observations of smaller scales are limited, and we might be missing 75% of the mesoscale eddies at high latitudes. The future SWOT SAR-interferometry wide-swath altimeter mission aims to provide 2D swath observations of ocean surface topography to characterize the ocean mesoscale and submesoscale circulation from the...