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WikiPedia: Envisat //edwardbetts.com/find_link?q=Envisat http://www.spaceflightnow.com/news/n1204/12envisat... http://envisat.esa.int/ http://www.esa.int/esaCP/SEM1SXSWT1H_index_0.html https://earth.esa.int/web/guest/missions/esa-opera...