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Soyuz launch timeline
Posted: October 11, 2012

T-00:00:03 Engines at Full Thrust
The five main engines of the Soyuz rocket's core stage and four strap-on boosters are at full thrust.
T-00:00:00 Launch
Producing more than 900,000 pounds of thrust, the Soyuz 2-1b rocket soars into the sky from the Guiana Space Center.
T+00:01:58 Jettison Boosters
The Soyuz rocket's four strap-on boosters, each powered by an RD-107A engine, are jettisoned after consuming their propellant.
T+00:03:38 Jettison Fairing
The ST-type payload fairing is released from the Soyuz rocket when it reaches the edge of the upper atmosphere. The 13.5-foot-diameter fairing protects the payload during the launch countdown and the flight through the dense lower atmosphere.
T+00:04:48 Core Stage Separation
Having burned its propellant, the core stage of the Soyuz rocket, also known as the second stage, separates and the third stage's RD-0124 engine ignites to continue the flight.
T+00:09:24 Soyuz/Fregat Separation
The Soyuz rocket's third stage releases the Fregat upper stage just shy of orbital velocity.
T+00:10:24 First Fregat Ignition
The hydrazine-fueled Fregat-MT upper stage, which is modified to carry additional propellant, ignites to place the Galileo satellites in an oval-shaped transfer orbit.
T+00:23:31 First Fregat Shutdown
The Fregat-MT upper stage shuts down to begin a coast phase lasting more than three hours.
T+03:34:40 Second Fregat Ignition
The Fregat-MT stage's main engine fires for a second time to circularize its orbit.
T+03:39:57 Second Fregat Shutdown
After a 5-minute, 17-second burn, the Fregat-MT upper stage shuts down after entering a circular orbit 14,429 miles high with an inclination of 54.7 degrees.
T+03:44:57 Spacecraft Separation
The two Galileo in-orbit validation satellites separate from their dispenser.

Data source: Arianespace