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 Ugandan capital Kampala on the shores of Lake Victoria, seen in a multitemporal Envisat ASAR Wide Swath Mode image. Because radar images represent surface backscatter rather than reflected light, there is no colour in a standard radar image. Instead the colour in this image is due to it being a multitemporal composite, made up of three Advanced Synthetic Aperture Radar (ASAR) images acquired on different dates, with separate colours assigned to each acquisition to highlight differences between them. In this composite, red relates to an acquisition on 30 May 2004, green to one on 11 January 2004 and blue to one on 28 September 2003.