Eumetsat had signed a contract with Arianespace in 2015 to launch two or three Meteosat Third Generation satellites on Ariane 5 rockets between 2019 and 2023.
The sounding satellite MTG-S1, for which Eumetsat had a firm Ariane 5 launch contract, is now scheduled to launch in 2023 on an Ariane 6, Eumetsat announced July 2.