Copernicus, formerly Global Monitoring for Environment and Security (GMES), is a programme of the European Commission which aims at achieving an autonomous, multi-level operational Earth observation capacity. Its cost during 1998 to 2020 is estimated to be 8.4 billion euros. European Space Agency has performed much of its design and oversees and co-funds the development of Sentinel satellites (1,2,3,4 and 5) and instruments for MTG and MetOp-SG weather satellites of EUMETSAT.