The Gravity Field and Steady-State Ocean Circulation Explorer (GOCE; pronounced ‘go-chay’) is measuring Earth s gravity field and model the geoid with extremely high accuracy. It was launched on 17 March 2009. Owing to its sleek shape, GOCE is often cited as one of ESA s most elegant space probes. The mission ended on 11 November 2013 after a planned destructive re-entry into the atmosphere.