Intelsat 37e, BSat-4a - Ariane 5 ECA (VA239) - Kourou ELA-3 - 29.09.2017, 21:56 UTC

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09/06/2017 00:33
Minus-18 minutes. Some statistics on today's flight:

Спойлер

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• 239th launch of an Ariane rocket since 1979
• 292nd Arianespace mission
• 95th launch of an Ariane 5 rocket since 1996
• 64th launch of an Ariane 5 ECA rocket since 2002
• 70th flight of a Vulcan 2 engine
• 196th flight of an HM7B engine
• 82nd Ariane 5 launch targeting GTO
• 60th satellite for Intelsat launched by Arianespace
• 55th Boeing-built satellite launched by Arianespace
• 9th satellite for B-SAT launched by Arianespace
• 64th SSL-built satellite launched by Arianespace
• 9th launch from the Guiana Space Center in 2017
• 5th Ariane 5 launch in 2017
  

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09/06/2017 00:37
During the last few minutes, the Synchronized Sequence has been prepped for activation. This computer-run sequence assumes control of the countdown at the Minus-7 minute mark to perform the final tasks to place the rocket and pad systems in launch configuration.

At Minus-4 seconds, the rocket's onboard computer will take over control of main engine start, health checks of the powerplant and solid rocket booster ignition commanding for liftoff.

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Spaceflight101 LIVE‏ @S101_Live 2 мин. назад

Showing a GREEN Board at L-14 Minutes as critical decision points approach at T-10 minutes to get a GO for auto sequence. #Ariane5

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Chris B - NSF‏ @NASASpaceflight 3 мин. назад

Well good evening to you, Ariane 5 and your happy passengers Intelsat 37e & BSAT-4a.... UPDATES: https://forum.nasaspaceflight.com/index.php?topic=43447.0 ...

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Spaceflight101 LIVE‏ @S101_Live 4 мин. назад

#Ariane5 is set for 25.5min of powered flight & a ballistics phase of 22min to send the satellites on their way: http://bit.ly/2x7tRjh 

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Spaceflight101 LIVE‏ @S101_Live 3 мин. назад

L-10 Minutes: Payload teams are now providing a final confirmation of satellite readiness & a final weather check is completed. #Ariane5

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Spaceflight101 LIVE‏ @S101_Live 2 мин. назад

The 7-minute Synchronized Sequence includes all critical reconfigurations to transition #Ariane5 to flight mode.

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09/06/2017 00:44
Minus-7 minutes and counting. The synchronized sequence has started. Computers are now in control of this automated final phase of the launch countdown to prepare the rocket and ground systems for liftoff. There are three computers running the countdown - one aboard the Ariane 5 and two redundant computers at the launch complex.
The launch time is set for 2151:00 GMT (5:51:00 p.m. EDT; 6:51:00 p.m. French Guiana time). Liftoff actually occurs even seconds later with ignition of the solid rocket boosters.

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Spaceflight101 LIVE‏ @S101_Live 1 мин. назад

T-7 Minutes: SYNCHRONIZED SEQUENCE - Computers are now in control of the #Ariane5 launch countdown. Weather is excellent for liftoff.

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Spaceflight101 LIVE‏ @S101_Live 1 мин. назад

T-6:30: Propellants are being topped up at flight level before ground propellant supply is terminated on the first stage. #Ariane5

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Spaceflight101 LIVE‏ @S101_Live 55 сек. назад

T-6 Min: Pyrotechnics are now being armed & second stage helium load is closing out. Pad Safety and Flood Valves are being opened. #Ariane5

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Spaceflight101 LIVE‏ @S101_Live 51 сек. назад[/url

T-5 Minutes: Still showing GREEN status panels as [url=https://twitter.com/hashtag/Ariane5?src=hash]#Ariane5 approaches tank pressurization and transfer to internal power.

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DutchSpace‏ @DutchSpace 6 мин. назад

Green board for #Ariane5 #VA239

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Spaceflight101 LIVE‏ @S101_Live 38 сек. назад

T-3:30: LH2 Topping on the 2nd stage is closing out. The precise T-0 time is being synchronized across all sequencers. #Ariane5

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