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

[tnt22]

ULA‏Подлинная учетная запись @ulalaunch 25 сек. назад

We are scrubbed for the day. #AtlasV #NROL52

[tnt22]

[tnt22]

10/06/2017 11:35

Tomorrow's launch time is 3:59 a.m. EDT (0759 GMT).

[tnt22]

Chris B - NSF‏ @NASASpaceflight 2 мин. назад

SCRUB: 24 hour recycle. Vehicle and payload not at fault, this was all on the unacceptable weather. Read the overview of this mission - by William Graham - here: https://www.nasaspaceflight.com/2017/10/ula-atlas-v-nrol-52-launch-cape-canaveral/ ...

ULA Atlas V NROL-52 launch moved to Saturday

[tnt22]

[tnt22]

ULA‏Подлинная учетная запись @ulalaunch 3 мин. назад

#AtlasV #NROL52 launch scrubbed today due to weather. New launch date and time: Saturday, Oct. 7at 3:59 am ET.

[tnt22]

10/06/2017 11:41

To recap, unfavorable weather conditions at Cape Canaveral have interrupted back-to-back countdowns of the Atlas 5 rocket launch of the NROL-52 national security satellite.

Fierce winds caused Thursday's scrub and lightning prompted today's postponement.
Another try will be made on Saturday morning at 3:59 a.m. EDT (0759 GMT). A slight improvement in conditions is expected.

[tnt22]

http://www.ulalaunch.com/atlas-v-to-launch-nrol52.aspx

Atlas V to Launch NROL-52

(Oct. 6, 2017, 4:47 a.m. EDT ) – The launch of a United Launch Alliance Atlas V carrying the NROL-52 mission was scrubbed today due to weather.

The launch is planned for Saturday, Oct. 7, from Space Launch Complex-41 at Cape Canaveral Air Force Station. The launch time is 3:59 a.m. ET.

[/li]
• Rocket: Atlas V 421
• Mission: NROL-52
• Launch Date: Saturday, Oct. 7, 2017
• Launch Time: 3:59 a.m. EDT
• Live Broadcast: Begins at 3:39 a.m. EDT
  

[tnt22]

Прогноз погоды на 2017-10-07 L-1 (3-я попытка)
Atlas V AV-075 NROL-52 L-1 Forecast
 
60 % GO

[tnt22]

Chris G - NSF‏ @CwG_NSF 4 ч. назад

Launch weather forecast for attempt #3 of #AtlasV & the #NROL52 mission tonight. 60% favorable odds. 53min launch window opens at 03:59 EDT.

[tnt22]

Spaceflight Now‏ @SpaceflightNow 4 ч. назад

The odds of acceptable weather are 60% favorable for the 3:59amEDT (0759 GMT) launch of Atlas 5 #NROL52 on Saturday https://spaceflightnow.com/2017/10/02/av075_journal/ ...

[tnt22]

Spaceflight Now‏ @SpaceflightNow 2 ч. назад

This just 4th Atlas 5 launch to experience multiple scrubbed countdowns in 15-yr history. Those all went on 3rd try. #NROL52 3rd try tonight

[tnt22]

Обновлён адрес трансляции ULA на ТыТрубе на 2017-10-07

youtube.com/watch?v=wZueNB_R5pI

[tnt22]

tnt22 пишет:
Обновлён адрес трансляции ULA на ТыТрубе на 2017-10-07

Теперь официально от ULA
http://www.ulalaunch.com/atlas-v-to-launch-nrol52.aspx

Atlas V to Launch NROL-52

Live Atlas V NROL-52 broadcast will begin at 3:39 a.m. EDT. Watch via the ULA website or YouTube channel.

[tnt22]

ULA‏Подлинная учетная запись @ulalaunch 54 мин. назад

The ULA launch team is back on console and clocks are counting down to #AtlasV #NROL52 launch at 3:59amET

[tnt22]

10/07/2017 04:09

Hoping for some cooperation from the weather tonight, the third countdown has commenced for the United Launch Alliance Atlas 5 rocket on the NROL-52 national security satellite deployment mission.

Clocks are picking up the seven-hour sequence of work that will prepare the booster, payload and ground systems for blastoff at 3:59 a.m. EDT (0759 GMT).

Спойлер

The launch team will start powering up the rocket to commence standard pre-flight tests. Over the subsequent few hours, final preps for the Centaur's liquid oxygen and liquid hydrogen systems will be performed, along with a test of the rocket's guidance system and the first stage propulsion and hydraulic preps, internal battery checks and testing of the GPS metric tracking system used to follow the rocket as it flies downrange, plus a test of the S-band telemetry relay system.

A planned hold begins when the count reaches T-minus 2 hours. Near the end of the 15-minute hold, the team will be polled to verify all is in readiness to start fueling the rocket for launch.

Supercold liquid oxygen begins flowing into the Centaur upper stage, followed by the first stage filling. Liquid hydrogen fuel loading for Centaur will be completed a short time later.

A final hold is scheduled at the T-minus 4 minute mark. That 15-minute pause will give everyone a chance to finish any late work and assess the status of the rocket, payload, Range and weather before proceeding into the last moments of the countdown.

[свернуть]

[tnt22]

10/07/2017 04:47

The vehicle has been powered up for launch just over six hours from now.

After each of the scrubs, the vehicle was safed and deactivated by the launch team while backing out of the countdown procedures to wait out the delays. Each fresh count begins the sequence again from the start.

[tnt22]

[tnt22]

10/07/2017 05:36 Weather improves to 70% GO

In the countdown's first official weather briefing, the Air Force launch weather officer says conditions are much more favorable tonight than the past two days.

The odds of acceptable liftoff conditions have improved to 70 percent for liftoff of the Atlas 5 rocket at 3:59 a.m. EDT (0759 GMT). The primary concern will be cumulus clouds.

The launch time outlook calls for scattered clouds, limited isolated showers, good visibility, southeasterly winds of 10 knots gusting to 15 knots and a temperature of 80 degrees F.

[tnt22]

Spaceflight Now‏ @SpaceflightNow 7 мин. назад

Weather forecast improves to 70% GO for overnight Atlas 5 #NROL52 launch from Cape Canaveral https://spaceflightnow.com/2017/10/02/av075_journal/ ...