L-0 Day	December 8, 2010
T-02:35:00....Poll stations to proceed with countdown master autosequence, fuel and oxidizer loading T-01:40:00....Lower strongback umbilical tower T-01:00:00....Allow countdown autosequence to proceed with Stage 2 fuel bleed and thrust vector control bleed T-00:13:00....Poll by SpaceX launch director T-00:11:00....Logical hold point T-00:10:00....Begin terminal countdown sequence T-00:09:43....Open prevalves to chill down first stage Merlin engine pumps T-00:06:17....Issue command to align flight computer T-00:05:00....Terminate loading of gaseous nitrogen into second stage T-00:04:46....Transfer first and second stages to internal power T-00:03:11....Arm flight termination system T-00:03:02....Terminate liquid oxygen propellant topping T-00:03:00....Verify movement of second stage thrust vector control steering actuators T-00:02:30....SpaceX launch director verifies "go" for launch T-00:02:00....Range verifies "go" for launch T-00:01:35....Terminate loading of helium pressurant T-00:01:00....Command flight computer to start-up state and turn on pad deck water deluge system T-00:00:50....Check first stage thrust vector control steering actuators T-00:00:40....Pressurize first and second stage propellant tanks T-00:00:03....Command first stage engine ignition sequence T-00:00:00....Liftoff

Data Source: SpaceX