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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This is the first track measured by Sentinel-3A’s Synthetic Aperture Radar Altimeter immediately after it was switched on. The instrument will be a vital tool for closely monitoring changes in surface ocean waters, sea-state and sea-ice thickness. The track, which captures features in the Gulf Stream current, compares well to the background data that comprises near-realtime data from the CryoSat, Jason-2 and Altika satellites.