Missions

INTELSAT 27

 

MISSION PROFILE

From its ocean-based launch site located directly on the equator at 154 degrees West longitude, a Zenit-3SL launch vehicle will lift the Intelsat 27 spacecraft into an optimized geosynchronous transfer orbit on its way to its final geostationary orbit at 304.5 degrees East longitude.

After liftoff, the Zenit-3SL rocket will begin its ascent phase of flight, achieving maximum acceleration at 116 seconds into the flight.  The first stage of the vehicle will separate 2:30 minutes (150 seconds) after liftoff, and the protective payload fairing will be jettisoned 82 seconds later at 3:52 minutes. The second stage will conduct a 6 minute burn, followed by its separation from the Block DM-SL upper stage.  The Block DM-SL will begin its first and only burn at 8:41 minutes (521 seconds) into the mission, for the duration of 699 seconds.  The upper stage will then shut down for an almost 10 minute coast period before spacecraft separation over equatorial South America.



LAUNCH TIMELINE

Time

Event

L= 0:00:00

Go Inertial

L= 0:00:05

Liftoff

L+ 0:02:30

Stage 1 Separation

L+ 0:03:52

Payload Fairing Jettison

L+ 0:08:31

Stage 2 Separation

L+ 0:08:41

Block DM-SL 1st Burn Ignition

L+ 0:20:20

Block DM-SL 1st Burn Cutoff

L+ 0:30:10

Spacecraft Separation


GROUNDTRACK



INJECTION PARAMETERS




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