This document provides an overview of a study on the economic benefits of a free and open data policy for data from the Sentinel satellites under the GMES program. The study examines the theoretical framework and empirical evidence from other public sector information domains that making data freely available can generate greater economic returns than cost recovery models. The evidence suggests that free reuse of GMES satellite data has the potential to stimulate the European Earth observation services industry and help it become a global leader, generating new businesses, jobs, and tax revenues. The study concludes by recommending policymakers adopt policies that improve the commercial environment for the industry to grow and contribute to economic growth in Europe.