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Soyuz launch timeline
Posted: December 16, 2011

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 2-1a 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+00:03:29 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+00:04:47 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-0110 engine ignites to continue the flight.
T+00:08:47 Soyuz/Fregat Separation
The Soyuz rocket's third stage releases the Fregat upper stage just shy of orbital velocity.
T+00:09:47 First Fregat Ignition
The hydrazine-fueled Fregat upper stage ignites to place the Pleiades 1, ELISA and SSOT satellites in a low-altitude parking orbit.
T+00:13:27 First Fregat Shutdown
The Fregat upper stage shuts down to begin a coast phase.
T+00:41:56 Second Fregat Ignition
The Fregat stage's main engine fires for a second time to circularize its orbit at nearly 435 miles above Earth.
T+00:46:05 Second Fregat Shutdown
After a 4-minute, 9-second burn, the Fregat upper stage shuts down after entering a circular orbit with an inclination of 98 degrees.
T+00:55:00 Pleiades 1 Separation
The Pleiades 1 satellite separates from the upper position on the Soyuz rocket's APAS-S multi-payload dispenser.
T+00:59:05 ELISA Separation
The four ELISA electronic intelligence satellites deploy simultaneously.
T+02:03:25 Third Fregat Ignition
The Fregat engine ignites for 12 seconds to start lowering its orbit for deployment of Chile's SSOT Earth imaging satellite.
T+02:03:37 Third Fregat Shutdown
The Fregat engine shuts down and enters a 65-minute coast phase.
T+03:08:37 Fourth Fregat Ignition
Another brief Fregat burn begins to position the rocket for separation of the SSOT satellite.
T+03:08:47 Fourth Fregat Shutdown
The Fregat stage engine turns off after reaching a 379-mile-high orbit for the deployment of the SSOT satellite.
T+03:12:07 APAS-S Separation
The APAS-S multi-payload adapter is jettisoned to expose the SSOT satellite for separation.
T+03:26:00 SSOT Separation
Chile's SSOT Earth observation satellite is released to complete the Soyuz rocket's second flight from French Guiana.

Data source: Arianespace