16:30 CEST - ATV has performed the first burn to start departure from S2. This includes a 270-second thruster burn (forecast), with a target delta-V (change in  velocity) of 1.7 m/sec. More details after the jump... -- Daniel

The first burn is followed by 510 seconds of drifting (again, approximate; all figures will be confirmed after the event). The next burn should last 180 seconds and provide a delta-V of 0.9 m/second, followed by a drift of 600 sec.

The third burn should run for 150 sec to provide a delta-V of 0.9 m/sec, followed by 340 seconds of drift. This should bring ATV to S3, a station keeping point 249 m from the ISS.

There will be a final burn to stop, with a burn time of 350 sec and providing a delta-V of 1.7 m/sec. This final thrust will bring ATV to a relative velocity of 0 m/sec with respect to the ISS. Mission controllers will recalculate each burn to keep track of and verify what ATV does, but the entire process will happen automatically under ATV's own autonomous control.