UNC hydrologist Tamlin Pavelsky stands in front of a NASA KingAir B200, which houses the AirSWOT suite of instruments. Scientists including Pavelsky are using AirSWOT to provide new measurements of surface water and ocean topography, which help them understand the movement of water around the planet. AirSWOT flights are being conducted in preparation for the SWOT satellite mission, which will launch in 2021 and make similar measurements for the whole globe.