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Voyaging for the Sentinels. Vital Earth-based campaigns to make sure the @CopernicusEU @ESA_EO #Sentinel satellites are delivering accurate data about our #oceans
http://www.esa.int/Our_Activities/Observing_the_Earth/Copernicus/Voyaging_for_the_Sentinels https://twitter.com/esa/status/972788222257328129/photo/1 source: https://twitter.com/esa/status/972788222257328129