Spaceflight Now


STS-111 Ascent Timeline
SPACEFLIGHT NOW
Updated: June 4, 2002

STS-111


Event Descriptions

T+0:00 Liftoff
The twin solid rocket boosters are ignited and space shuttle Endeavour launches from pad 39A at Kennedy Space Center, Florida, beginning the 110th shuttle mission.
T+0:10 Start roll maneuver
Endeavour beings a programmed roll maneuver to achieve a northeasterly track from KSC, heading toward a 51.6 degree inclination to the equator.
T+0:18 End roll
The shuttle completes the programmed roll maneuver and is now positioned heads down, wings level.
T+0:35 Start throttle down
The three liquid-fueled main engines are throttled down to ease the vehicle's flight through the dense lower atmosphere.
T+0:47 Throttle up
Endeavour's main engines begin throttling back up to about full thrust for the continued trek to space.
T+0:59 Max-Q
The shuttle passes through the area of maximum aerodynamic pressure that is experienced during its climb to orbit.
T+2:04 SRB staging
Having consumed all their propellant, the solid rocket boosters are jettisoned from the attachment points on the external fuel tank. The boosters parachute into the Atlantic Ocean for recovery and reuse.
T+3:52 Negative return
Endeavour is now too far downrange and traveling too fast to make an emergency Return-to-Launch-Site abort landing at Kennedy Space Center. A problem after this point during flight requiring an abort would lead to a Trans-Atlantic Abort Landing, Abort-to-Orbit or Abort-Once-Around.
T+5:46 Rolls to heads up
A programmed maneuver rolls Endeavour to a heads up position, placing the shuttle atop the external tank. This is done to improve communications between the shuttle and NASA's orbiting Tracking and Data Relay Satellite System.
T+8:22 MECO command
Endeavour's three main engines are shut down. The external fuel tank is jettisoned moments later. An upcoming firing at about T+45 minutes by the OMS engines will boost the shuttle from its current sub-orbital trajectory to a safe altitude as the chase begins to rendezvous with the International Space Station.

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