NROL-52 – Atlas V 421 (AV-075) – Канаверал SLC-41 – 15.10.2017 07:28 UTC

[tnt22]

10/06/2017 10:11

The 950,000-pound Atlas 5 rocket now stands fueled for launch as the countdown continues on schedule for a liftoff at 4:03 a.m. EDT (0803 GMT).
However, weather is RED at this time due to cloud cover.

[tnt22]

10/06/2017 10:14

Atlas first stage LOX tank at 100 percent.

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10/06/2017 10:37 Waiting on the weather

Current weather conditions are observed NO GO due to the violation to a thunderstorm that has developed nearby. The cumulus cloud and lightning rule are RED.

[tnt22]

Spaceflight Now‏ @SpaceflightNow 2 мин. назад

Weather observed and forecast NO GO for launch of the Atlas 5 on #NROL52 today due to a thunderstorm that has formed https://spaceflightnow.com/2017/10/02/av075_journal/ ...

[tnt22]

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10/06/2017 10:46 Countdown in pre-planned hold

T-minus 4 minutes and holding. The countdown has entered the planned 15-minute built-in hold designed to give a bit of margin to deal with any problems. Also during this time, the final readiness polls of the launch team and management members will be performed.
If the weather remains RED, the hold will be extended.

[tnt22]

10/06/2017 10:46

All three cryogenic tanks on the rocket have been topped off to flight level.

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ULA‏Подлинная учетная запись @ulalaunch 46 сек. назад

Right now launch weather is no-go due to lightning in the area. Cross those fingers! #AtlasV #NROL52

[tnt22]

Emre Kelly‏Подлинная учетная запись @EmreKelly 2 ч назад

Nice morning for an #AtlasV launch, no? #NROL52

[tnt22]

Tory Bruno‏Подлинная учетная запись @torybruno 2 мин. назад
Board is green, except for weather

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ULA‏Подлинная учетная запись @ulalaunch 2 мин. назад

At customer request, #NROL52 live coverage will wrap after confirmation of payload fairing jettison, ~4.5 mins after liftoff #AtlasV

[tnt22]

10/06/2017 10:54

HOLD EXTENDED due to unacceptable launch weather. Liftoff will be no sooner than 4:08 a.m. EDT (0808 GMT).

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ULA‏Подлинная учетная запись @ulalaunch 1 мин. назад

We are going to extend the current planned hold at T-4 minutes due to weather. Watch live at http://www.ulalanch.com/webcast.aspx  #AtlasV #NROL52

[tnt22]

Chris B - NSF‏ @NASASpaceflight 2 мин. назад

Atlas V behaving well. Weather needs to behave. Next will be to poll to come out of the Built In Hold.

[tnt22]