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 image shows Sea Level Anomaly as recorded by the RA-2 across most of Envisat’s orbital cycle 15. Local sea level can vary above and below the average by up to 100 metres – mostly due to constant factors such as tides, oceanic circulation and variations in the local gravitational field, or geoid. In this image these constant variations have been removed to make visible the remaining 1% of variations of greatest interest to researchers, such as those caused by the El Niño instability