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Sentinel-3 is an Earth observation satellite mission developed by the ESA as part of the Global Monitoring for Environment and Security GMES program.〔 〕〔 〕 GMES is the European programme to establish a European capacity for Earth observation designed to provide European policy makers and public authorities with accurate and timely information to better manage the environment, and to understand and mitigate the effects of climate change. ==Overview== On the 14 of April 2008, the European Space Agency and Thales Alenia Space signed a €305 million contract to build the first GMES Sentinel-3 in its Cannes Mandelieu Space Center. Satellite platform was delivered to France for final components assembly in 2013. Communications systems were completed by Thales Alenia Space España in early 2014. The Sentinel-3 mission's main objective is to measure sea-surface topography, sea- and land-surface temperature and ocean- and land-surface colour with accuracy in support of ocean forecasting systems, and for environmental and climate monitoring.〔〔 Sentinel-3 builds directly on the heritage pioneered by ERS-2 and Envisat satellites. Near-real time data will be provided for ocean forecasting, sea-ice charting, and maritime safety services on the state of the ocean surface, including surface temperature, marine ecosystems, water quality and pollution monitoring.〔 A pair of Sentinel-3 satellites will enable a short revisit time of less than two days for OLCI instrument and less than one day for SLSTR at the equator. The satellite orbit provides a 27-day repeat for the topography package, with a 4-day sub-cycle.〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Sentinel-3」の詳細全文を読む スポンサード リンク
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