| T-04:50:00 |
Russian State Commission Meets |
| The Russian State Commission meets to authorize fueling of the Soyuz rocket. |
|
| T-04:00:00 |
Fueling Begins |
| Loading of kerosene and liquid oxygen propellants begins for the Soyuz rocket's three lower stages. |
|
| T-01:35:00 |
Fueling Complete |
| The rocket is fully fueled for launch. |
|
| T-01:00:00 |
Gantry Retracts |
| The 170-foot-tall mobile service gantry moves to the launch position on rails, revealing the Soyuz rocket for launch. |
|
| T-00:05:10 |
Key on Start |
| The launch key is put in place in the control center to begin the Soyuz synchronized countdown sequence. |
|
| T-00:05:00 |
Fregat on Internal Power |
| The Fregat-MT upper stage is tranferred to internal battery power. |
|
| T-00:02:25 |
Upper Umbilical Retracts |
| The umbilical arm reaching the upper portion of the Soyuz rocket retracts. This event also ends the stream of spacecraft telemetry from the O3b satellites. |
|
| T-00:00:40 |
Soyuz on Internal Power |
| The Soyuz rocket transitions to internal power. |
|
| T-00:00:20 |
Lower Umbilical Retracts |
| The umbilical arm servicing the lower portion of the Soyuz rocket retracts. |
|
| T-00:00:17 |
Ignition |
| The ignition sequence begins for the Soyuz rocket's core stage and four strap-on boosters. |
|
| T-00:00:03 |
Full Thrust |
| The RD-107A and RD-108A engines reach their full power level, totaling more than 900,000 pounds of thrust. |
|
| T-00:00:00 |
Liftoff |
| The launch pad hold-down arms retract and the Soyuz rocket soars into the sky. |
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