Water covers most of our planet, but understanding how it moves and changes remains a major scientific challenge. The Surface Water and Ocean Topography (SWOT) mission is helping scientists gain a clearer picture of Earth’s water systems through advanced satellite technology.

Developed jointly by NASA and the French space agency CNES, SWOT launched in December 2022. It uses innovative radar technology to measure water surface elevations across rivers, lakes, reservoirs, and oceans.

Unlike traditional satellite altimeters that collect measurements along narrow tracks, SWOT observes broad areas of Earth’s surface. This capability enables scientists to study river widths, monitor changes in lake levels, and map variations in ocean surface height with greater spatial coverage.

These observations have important real-world applications. SWOT data can improve our understanding of freshwater availability, support flood and drought research, and provide valuable insights into ocean circulation and the global water cycle.

By combining satellite observations with scientific analysis, SWOT is advancing the way researchers monitor water resources and investigate environmental change. Its mission demonstrates how Earth observation technology can transform complex measurements from space into meaningful insights about our planet.

From rivers and lakes to the vast oceans, SWOT is helping us see Earth’s water in a whole new way.