The performance of the Envisat orbit maintenance manoeuvres was as follows: (Mid-)Time Mode Target Size Nominal Size Calibrated Size First burn 2008/09/19-02:53:51 SFCM -0.0009 m/s -0.0009 m/s -0.0008 m/s The overall calibration result has been: -7.7% The total fuel consumption has been: 0.0031 kg