The European Space Agency (ESA) is Europe’s gateway to space. Its mission is to shape the development of Europe’s space capability and ensure that investment in space continues to deliver benefits to the citizens of Europe and the world.
Find out more about space activities in our 23 Member States, and understand how ESA works together with their national agencies, institutions and organisations.
Exploring our Solar System and unlocking the secrets of the Universe
Go to topicProtecting life and infrastructure on Earth and in orbit
Go to topicUsing space to benefit citizens and meet future challenges on Earth
Go to topicMaking space accessible and developing the technologies for the future
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The radar altimeter carried by the Sentinel6/Jason-CS satellite uses a new interleaved mode of operation to provide the best measurements of ocean sea-level variability and change. An advanced microwave radiometer that measures the water vapour in the atmosphere complements the altimeter. This information is used to correct the altimeter measurements and for weather forecasting. It builds on heritage from the Jason series of satellites, Copernicus Sentinel-3 and ESA’s CryoSat mission and acts as the reference mission for the satellite altimeter constellation.