NASA's Surface Water and Ocean Topography (SWOT) satellite is set to make a first-ever global survey of Earth's surface water by collecting detailed measurements of how bodies of water change over time. The satellite will survey at least 90 percent of the globe, studying Earth's lakes, rivers, reservoirs, and oceans at least twice every 21 days. The data collected by these surveys could improve ocean circulation models and weather and climate predictions, while aiding in freshwater management around the world.

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