NROL-42 (SBIRS HEO-4) – Atlas V 541 (AV-072) – Ванденберг SLC-3E – 22.09.2017, 05:38 UTC

[tnt22]

[tnt22]

09/24/2017 08:24 GO for launch

The ULA launch director and NRO mission director have given the formal approvals to press onward with the countdown.

[tnt22]

09/24/2017 08:26

T-minus 3 minutes, 50 seconds. The ground pyrotechnics have been enabled.

[tnt22]

09/24/2017 08:27

HOLD.

[tnt22]

ULA‏Подлинная учетная запись @ulalaunch 29 сек. назад

HOLD HOLD HOLD

[tnt22]

09/24/2017 08:28

Countdown safing is in progress.

[tnt22]

Spaceflight101 LIVE‏ @S101_Live 2 мин. назад

HOLD! The Countdown has been stopped inside T-4 minutes due to a problem. Vehicle safing is in progress! http://bit.ly/2wcQWN5  #NROL42

[tnt22]

Spaceflight101 LIVE‏ @S101_Live 16 сек. назад

#AtlasV moving back into its safe T-4 configuration with tanks in topping and Flight Termination System on external power & disabled #NROL42

[tnt22]

[tnt22]

09/24/2017 08:32

NEW LAUNCH TIME is being targeted for 10:49:47 p.m. local (0549:47 GMT).

[oby1]

8:47

[tnt22]

Spaceflight Now‏ @SpaceflightNow 2 мин. назад

NEW LAUNCH TIME is being targeted for 10:49:47 p.m. local (0549:47 GMT) https://spaceflightnow.com/2017/09/19/av072_journal/ ...

[tnt22]

Chris B - NSF‏ @NASASpaceflight 3 мин. назад

49 mins past the hour for the second attempt.

[tnt22]

Tory Bruno‏Подлинная учетная запись @torybruno 14 сек. назад

Issue resolved. Board is green

[tnt22]

09/24/2017 08:35

The vehicle cryogenic tanks are being topped off. Recycle is complete.

[tnt22]

[tnt22]

09/24/2017 08:41

Liquid oxygen and liquid hydrogen tanks are at flight level again.

[tnt22]

[tnt22]

[tnt22]

09/24/2017 08:44

Countdown clocks will resume in one minute.