Soyuz on the launch pad

Sentinel-1A launch timeline

Find below a detailed timeline for the launch of Sentinel-1A on 3 April 2014. Liftoff is set for 21:02:31 GMT on Soyuz ST flight VS07 from Europe’s Spaceport in Kourou, French Guiana. This is a real-time activity and all times are subject to change.

Follow the launch live online via the Arianespace webcast (20:40 GMT start) or watch the ESA launch event live from ESOC (19:30 GMT start).

An expanded version of this timeline is available in the blog.

GMT

CEST

MET

Event

Details

  –48:00:00Receive telemetry from satelliteMission control team at ESOC receive telemetry from Sentinel-1A mounted on top of Soyuz from launch pad
14:02:3116:02:31–07:00:00Start satellite switch-onSatellite switch on & configuration activities begin at launch site. Sentinel-1A receiving power from ground. Start pre-launch operations timeline
14:32:3116:32:31–06:30:00Mission Control Team on consoleB-Team Flight Control Team & Software Support team on console in Main Control Room. Start network countdown
17:02:3119:02:3104:00:00Start fuellingStart launcher fuelling
19:02:3121:02:3102:00:00Mission Control Team on consoleA-team Flight Control Team on console in Main Control Room
19:17:3121:17:3101:45:00End fuellingEnd launcher fuelling
19:41:3121:41:3101:21:00GO/NO-GO roll-callMission Operations Team reports readiness for launch to ESA Flight Director
20:02:3122:02:3101:00:00GantryRemove mobile gantry from launcher
20:52:3122:52:3100:10:00Satellite on internal powerSentinel-1A switched to internal battery power
20:56:2122:56:2100:06:10Launcher autosequenceBeginning of Soyuz autosequence
21:00:0623:00:0600:02:25Upper umbilical disconnectCable connecting Sentinal-1A to ground disconnected. Loss of S/C telemetry on screens at ESOC
21:01:3123:01:3100:01:00Soyuz launch auto-sequenceActivation of the automatic launch sequence
21:01:5123:01:5100:00:40Soyuz powerLauncher switches to on-board power
21:02:1123:02:1100:00:20Lower umbilical disconnectLower stage umbilical mast retraction
21:02:1423:02:1400:00:17IgnitionSoyuz engines start

GMT

CEST

MET

Event

Note

21:02:3123:02:3100:00:00L0Liftoff
21:04:2923:04:2900:01:581st stage separationBoosters discarded
21:06:0023:06:0000:03:29Fairing jettisonAbout 120km altitude (above atmosphere), aerodynamic fairing no longer needed
21:07:1823:07:1800:04:472nd stage separation3rd stage & Upper composite (payload plus the Fregat upper stage) continue climbing
21:07:1923:07:1900:04:483rd stage ignition 
21:11:1723:11:1700:08:46Upper composite separationUpper composite (payload plus the Fregat upper stage) separates from 3rd stage
21:12:1723:12:1700:09:46Fregat 1st burnStart 510-second Fregat main engine burn to place Sentinel-1A into injection orbit
21:22:3523:22:3500:20:04Fregat shutdownBeginning of ballistic phase
21:26:0023:26:0000:23:29SeparationSentinel-1A separates from Fregat
21:26:5523:26:5500:24:24Start of on-board autosequenceIncludes switch transmitter ON. Sentinel-1A on battery power
21:28:0523:28:0500:25:34AOS SVALAcquisition of signal via Svalbard station. Initial in-orbit status check
21:35:3923:35:3900:33:08LOS SVALEnd of first Svalbard pass
22:18:2400:18:2401:15:53AOS TROLLEstablish first telecommand upload link via Troll station. Ground station passes follow regularly via Troll, Kiruna & Svalbard stations
23:54:4001:54:4002:52:09Start deploymentsStart Synthetic Aperture Radar (SAR) antenna and Solar Array Wing (SAW) deployments. 10 steps: release, unfold, rotate, confirm
02:37:5304:37:5305:35:22Power PositiveSAW deployment partially complete. Sentinel-1A achieves power positive state
74:46:2209:46:2210:43:51End of DeploymentsDeployments of SAR & SAW complete

Notes:

  • CEST = GMT/UTC + 2
  • CEST = GFT (Kourou) + 5
  • MET: Mission elapsed time (negative before L0, positive after)
  • AOS: Acquisition of signal
  • LOS: Loss of signal

Last update: 3 April 2014

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