The performance of the Envisat orbit maintenance manoeuvres was as follows: (Mid-)Time Mode Target Size Nominal Size Calibrated Size First burn 2008/12/19-03:12:00 SFCM 0.0020 m/s 0.0020 m/s 0.0021 m/s The overall calibration result has been: +3.0% The total fuel consumption has been: 0.0083 kg