H0	Main Engine Ignition
The Vulcain 1 engine on the cryogenic main stage is started and undergoes computer checkout prior to launch.
H0+00:07.0	Solid Booster Ignition
The twin-solid rocket boosters attached to the cryogenic main stage are lit.
H0+00:07.3	Launch
The Ariane 5 rocket lifts off from ELA-3 complex at Guiana Space Center in Kourou, French Guiana, South America, to begin its 15th launch.
H0+00:13	Start Pitch Maneuver
Following a vertical ascent phase, the rocket begins a 10-second pitch rotation to achieve proper positioning for the climb through the atmosphere.
H0+00:17	Start Roll Maneuver
The Ariane 5 rocket begins a planned roll maneuver to the proper launch trajectory, heading eastward away from South America.
H0+02:21	Booster Separation
The solid-fuel rocket boosters have burned their propellant and are jettisoned to fall into the Atlantic Ocean.
H0+03:10	Jettison Payload Fairing
The payload fairing that protected the two communications satellites during launch is separated once heating conditions allow.
H0+09:56	Main Cryogenic Stage Extinction
The Vulcain 1 main engine shuts down. Seven seconds later, the spent main cryogenic stage separates to fall back to Earth. Predications indicate the stage will enter off the coast of South America in the mid-Pacific Ocean.
H0+10:09	Storable Propellant Stage Ignition
The storable propellant stage, the upper stage of Ariane 5, begins firing to deliver the Insat 3A and Galaxy 12 satellites into the planned deployment orbit.
H0+27:12	Storable Propellant Stage Shutdown
After completing its long-duration burn, the storable propellant stage shuts down. The injection orbit for satellite payload is planned with a perigee altitude of 860 km, apogee altitude of 35,936 km and inclination of 2 degrees.
H0+27:22	Insat 3A Separation
The Indian Space Research Organization's Insat 3A communications and meteorological observation satellite is released from the Ariane 5 rocket's storable propellant stage.
H0+32:48	Sylda 5 Separation
The barrel-shaped Sylda 5 payload adapter used to support two communications satellites launched by one Ariane 5 rocket is jettisoned.
H0+38:43	Galaxy 12 Separation
The PanAmSat Galaxy 12 telecommunications satellite is deployed into space from the Ariane 5 rocket to complete the launch.

Data source: Arianespace.