Lifting off on 13 August at 02:37 CEST (12 August 21:37 local time), the Ariane 6 rocket carried the four-tonne satellite into orbit around Earth. Confirmation that MetOp-SG-A1 was alive and well came at 04:47 CEST, after its solar array had been deployed, ensuring that the satellite could generate power.
https://www.esa.int/Applications/Observing_the_Earth/Meteorological_missions/MetOp_Second_Generation/First_MetOp-SG_and_Sentinel-5_launched?fbclid=IwQ0xDSwMI7NRjbGNrAwjspmV4dG4DYWVtAjExAAEezdBTW9wImot-J9wu5CSHLkF_YRV_QaHv8GOY0rtevaQ41hTGOKORSHPnaqA_aem_YeWLkJu5nXpkY46XnKU9wg