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Sentinel-1A launches and Copernicus data becomes free and open

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The first Copernicus Sentinel satellite reached orbit carrying a C-band synthetic aperture radar able to image through cloud and darkness, and its data was released under a free, full and open policy from the outset. Where Landsat had become free after decades of charging, Copernicus was designed to be free, and at a data volume large enough that the practical problem shifted from acquiring imagery to processing it — which is where the commercial layer of European Earth observation then formed.

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/atlas?object=EVT_SENTINEL_1A_2014