ESOC, the European Space Operations Centre, is ESA's operations control centre responsible for the control of all ESA satellites. Since 1967, it has successfully operated more than 50 missions, including Huygens, Venus Express, Mars Express, Rosetta, XMM-Newton, SMART-1 and Envisat. The main control room (MCR) and individual mission dedicated control rooms are linked to satellites via ESTRACK, ESA's worldwide network of ground tracking stations.
ESOC mission controllers are supported by a team of specialists working in flight dynamics, software and communications. ESOC operates satellites during their entire mission lifetime, carries out routine and corrective manoeuvres and conducts payload operations. The centre employs some 250 permanent staff and 550 contractors.