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

[tnt22]

ULA‏Подлинная учетная запись @ulalaunch 15 мин. назад

Some overnight beauty shots of ULA's #AtlasV with #NROL52. Speaking of overnight, launch is planned for 4:07amET tomorrow.

[tnt22]

Chris B - NSF‏ @NASASpaceflight 13 мин. назад

FEATURE ARTICLE: ULA Atlas V set for NROL-52 launch from Cape Canaveral - https://www.nasaspaceflight.com/2017/10/ula-atlas-v-nrol-52-launch-cape-canaveral/ ... - by William Graham. 12 hours to launch from the time of this tweet.

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ULA Atlas V set for NROL-52 launch from Cape Canaveral

[tnt22]

Bill Nelson‏Подлинная учетная запись @SenBillNelson 10 мин назад

Good news for Florida's Space Coast. Just spoke w/ Air Force Gen. Monteith - he confirmed the Cape is ready to handle two launches in a day.

[tnt22]

NRO‏Подлинная учетная запись @NatReconOfc 6 мин. назад

#NROL52 mission is poised to launch Oct. 5 from CCAFS, Fla. aboard a @ulalaunch #AtlasV rocket. @AFSpace @AF_SMC @45thSpaceWing (ULA photo)

[tnt22]

Об ОФИЦИАЛЬНОЙ ТРАНСЛЯЦИИ ULA:
http://www.ulalaunch.com/atlas-v-to-launch-nrol52.aspx

Atlas V to Launch NROL-52
Watch live! Coverage begins Oct. 5 at 3:47 a.m. EDT. Watch via the ULA website or YouTube channel.

[tnt22]

John Kraus‏ @johnkrausphotos 8 ч. назад

Photos fr om SLC-41 this morning, wh ere a @ulalaunch Atlas V is scheduled to launch #NROL52 at 4:07am tomorrow. Live coverage: @AmericaSpace

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[tnt22]

10/05/2017 04:17 Countdown ticking for NROL-52 launch

The countdown has commenced for launch of a covert payload for the U.S. spy satellite agency by a United Launch Alliance Atlas 5 rocket.

Clocks are picking up the seven-hour sequence of work that will prepare the booster, payload and ground systems for blastoff at 4:07 a.m. EDT (0807 GMT).

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The launch team will begin 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.

Going into the Countdown tonight, there is a 60 percent chance of acceptable liftoff weather. The first weather briefing of the count will occur in about an hour.

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[tnt22]

ULA‏Подлинная учетная запись @ulalaunch 3 ч. назад

We'll be back with #AtlasV #NROL52 countdown updates at 1:30amET, and the live broadcast beings at 3:47amET. http://bit.ly/av_nrol52 

[tnt22]

Tory Bruno‏Подлинная учетная запись @torybruno 3 ч. назад

#NROL52

[tnt22]

10/05/2017 04:56

The Atlas-Centaur vehicle has been powered up. Guidance system testing is next in the countdown.

[tnt22]

10/05/2017 05:48 Weather is 40% GO

Rain showers streaming off the Atlantic and strong, gusty winds are being felt across Cape Canaveral tonight courtesy of a tropical wave in the Bahamas.

In the countdown's first official weather briefing, the Air Force launch weather officer has decreased the odds of acceptable liftoff conditions to 40 percent. The primary concerns are cumulus clouds associated with the showers and ground winds, although those are expected to trend down overnight. The exact timing of isolated showers and when one might pass near the pad will be key.

The launch time outlook calls for scattered low-level clouds and broken mid and high cloudiness, isolated showers, good visibility, east-northeasterly winds off the water of 26 knots gusting to 30 knots and a temperature of 81 degrees F.

[tnt22]

Spaceflight Now‏ @SpaceflightNow 56 мин. назад

Weather now 40% GO for overnight Atlas 5 #NROL52 launch from Cape Canaveral due to clouds and gusty winds https://spaceflightnow.com/2017/10/02/av075_journal/ ...

[Pirat5]

tnt22 пишет:

Bill Nelson ‏Подлинная учетная запись @ SenBillNelson 10 мин назад
Good news for Florida's Space Coast . Just spoke w/ Air Force Gen. Monteith - he confirmed the Cape is ready to handle two launches in a day .

2 пуска в день? про что это он?

Weather now 40% GO

может он уже знает про отсрочку по погоде? 

[tnt22]

10/05/2017 08:07 L-3 hours and counting

The first four hours of the countdown have been completed at Cape Canaveral for the launch of NROL-52 at 4:07 a.m. EDT (0807 GMT).

In about 45 minutes, the launch team will be polled for readiness to begin fueling the Atlas 5 rocket. Tanking is scheduled to start a short time later.

[tnt22]

10/05/2017 08:14

Guidance system testing has wrapped up.

[tnt22]

10/05/2017 08:30

A band of rain showers is coming ashore over the Florida spaceport, which has caused the current winds to gust to 42 knots at the launch pad. Weather is RED at the present time due to cumulus clouds and ground winds.

These showers are fast-moving and should pass quickly. There is another cell about 25 miles away.

[tnt22]

ULA‏Подлинная учетная запись @ulalaunch 1 мин. назад

Good morning from Atlas mission control! #AtlasV #NROL52 countdown has just entered a planned hold. This is the 1st of 2 planned holds.

10/05/2017 08:37 Countdown in pre-planned hold

T-minus 2 hours and holding. The countdown has just entered the first of two planned, 15-minute holds over the course of the day that will lead to the 4:07 a.m. EDT (0807 GMT) launch of the Atlas rocket. The holds give the team some margin in the countdown timeline to deal with technical issues or any work that is running behind. The final hold is scheduled to occur at T-minus 4 minutes.

[tnt22]

10/05/2017 08:38

Nine additional minutes are being added to this hold. That time will be subtracted from the later T-minus 4 minute hold.

[tnt22]

ULA‏Подлинная учетная запись @ulalaunch 2 мин. назад

The #AtlasV #NROL52 weather forecast shows a 40% chance of favorable weather. Concerns are cumulus clouds and rain.

[tnt22]

10/05/2017 08:46

The final hands-on work has concluded at the launch pad and technicians are departing the complex for the remainder of the countdown to liftoff.