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TerraSAR-X
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<p>TerraSAR-X is an <a href="/facts/Imaging_radar/RqnFqqY0">imaging radar</a> <a href="/facts/Earth_observation_satellite/WK2zGRSV">Earth observation satellite</a>, a joint venture being carried out under a public-private-partnership between the <a href="/facts/German_Aerospace_Center/nIeKtKqd">German Aerospace Center</a> (DLR) and <a href="/facts/Astrium/Ifk7Qyey">EADS Astrium</a>. The exclusive commercial exploitation rights are held by the geo-information service provider <a href="/facts/Astrium/Ifk7Qyey">Astrium</a>. TerraSAR-X was launched on 15 June 2007 and has been in operational service since January 2008. With its twin satellite <a href="/facts/TanDEM-X/9hklzPrp">TanDEM-X</a>, launched 21 June 2010, TerraSAR-X acquires the data basis for the <a href="/facts/WorldDEM/9hklzPrp">WorldDEM</a>, the worldwide and homogeneous <a href="/facts/Digital_elevation_model/LMWSPfex">DEM</a> available from 2014. </p>