Sentinel-3A in the cleanroom at Thales Alenia Space in Cannes, France. On 15 October 2015, the media had a sneak preview of the satellite before it is packed and shipped to the Plesetsk launch site in Russia.
The mission is the result of close collaboration between ESA, the European Commission, Eumetsat, France’s CNES space agency, industry, service providers and data users. The satellite will systematically measure Earth’s oceans, land, ice and atmosphere to monitor and understand large-scale global dynamics. It will provide critical near-realtime information for ocean and weather forecasting.