ESA – European Space Agency

The European Space Agency (ESA) is an intergovernmental organization dedicated to space exploration, Earth observation, and satellite-based science. It develops and operates satellites, spacecraft, and instruments for applications in geodesy, climate monitoring, navigation, and planetary research. ESA missions contribute to the global geodetic infrastructure by providing data for gravity field modeling, Earth reference frames, and Earth observation, supporting precise positioning, monitoring of sea level, ice sheets, and tectonic motion.

More Info: https://www.esa.int/