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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UHF antenna at ESA's Redu Centre, used to uplink a signal to the Galileo's FM3 search and rescue repeater during in-orbit testing on 17 and 18 January 2013. The repeater picks up the UHF signal and rebroadcasts it in L-band microwave. When fully operational, the repeater will serve to relay distress calls to local authorities.