Read the latest news on the international Surface Water and Ocean Topography (SWOT) mission. Launched in December 2022, this satellite mission’s goal is to make the first global survey of Earth’s surface water, observe the fine details of the ocean’s surface topography, and measure how water bodies change over time. It is a collaboration between NASA and the French space agency Centre National d’Etudes Spatial (CNES), with contributions from the Canadian Space Agency (CSA) and United Kingdom Space Agency (UK Space Agency).