Space Station Assembly

Text Size

Soyuz Undocking/Landing Timeline
The following times are approximate. All times are keyed to elapsed time from undocking.

Soyuz configuration at undocking Undocking minus 0 minutes
Landing minus 3 hours, 23 minutes
Separation command to begin opening hooks and latches, which hold the Soyuz spacecraft to a docking port on the International Space Station.
+ Larger image (124 Kb)
Soyuz configuration at undocking plus 3 minutes Undocking plus 3 minutes
Landing minus 3 hours, 20 minutes
Hooks opened. Soyuz begins physical separation from Pirs at 4 inches per second.
+ Larger image (162 Kb)
Soyuz configuration at undocking plus 6 minutes Undocking plus 6 minutes
Landing minus 3 hours, 17 minutes
A 15-second separation burn when Soyuz is about 66 feet from the Station.
+ Larger image (129 Kb)
Soyuz configuration at undocking plus 2 hours, 29 minutes Undocking plus 2 hours, 29 minutes
Landing minus 54 minutes
When the Soyuz is at a distance of about 12 miles from the Station, the engines fire for a 4-minute, 21-second deorbit burn.
+ Larger image (119 Kb)
Soyuz configuration at undocking plus 2 hours, 57 minutes Undocking plus 2 hours, 57 minutes
Landing minus 26 minutes
The unoccupied Orbital Module separates from the Descent Module and burns upon re-entry into the atmosphere.
+ Larger image (107 Kb)
Soyuz configuration at undocking plus 3 hours Undocking plus 3 hours
Landing minus 23 minutes
Soyuz reaches Entry Interface -- 400,000 feet in altitude -- 31 minutes after the deorbit burn.
+ Larger image (112 Kb)
Soyuz configuration at landing minus 15 minutes Undocking plus 3 hours, 8 minutes
Landing minus 15 minutes
Parachutes are commanded to deploy. Two Pilot Parachutes are deployed, the second of which extracts the Drogue Chute. The Drogue slows the spacecraft's descent from a rate of 755 feet per second to 262 feet per second.
+ Larger image (146 Kb)
Soyuz configuration at landing plus 15 minutes The Main Parachute is then released. It slows the Soyuz to a descent rate of 24 feet per second. First, its harnesses allow the Soyuz to descend at an angle of 30 degrees to expel heat, then it shifts the Soyuz to a straight vertical descent.
+ Larger image (147 Kb)
Soyuz configuration at landing minus 15 minutes + Larger image (186 Kb)
Soyuz configuration 2 seconds before landing Landing minus 2 seconds
Six Soft Landing Engines fire to slow the vehicle's descent rate to 1.5 meters (5 feet) per second just 2.6 feet above the ground.
+ Larger image (159 Kb)
Soyuz configuration at landing Undocking plus 3 hours, 23 minutes
Soyuz lands.
+ Larger image (165 Kb)


+ Return to Soyuz main page