Cygnus OA-7 (CRS-7) - Atlas V - Canaveral SLC-41 - 18.04.2017 15:11 UTC

[tnt22]

04/18/2017 16:09

Now at the 30 percent level on the Centaur upper stage's liquid oxygen tank.

[tnt22]

NASA Social‏Подлинная учетная запись @NASASocial 9 мин. назад

Cargo launch today! Tune in at 10am ET to watch live coverage of today's 11:11am cargo launch to @Space_Station: http://www.nasa.gov/live

[tnt22]

04/18/2017 16:12  Atlas LOX loading
The conditioning of the systems for the first stage liquid oxygen tank have been completed. And a "go" has been given to begin pumping supercold liquid oxygen into the Atlas 5's first stage.
The Common Core Booster stage's liquid oxygen tank is the largest tank to be filled today. It holds 48,800 gallons of cryogenic oxidizer for the RD-180 main engine.

04/18/2017 16:14

Now half-full on the Centaur upper stage's liquid oxygen tank.

[tnt22]

ISS Updates‏ @ISS101 1 мин назад

Potential Collision Avoidance Cut-Outs in today's launch window are being submitted to the launch team at this time in the count. #Cygnus

[tnt22]

@CwG_NSF 48 сек. назад

Centaur upper stage is now 70% loaded with its Liquid Oxygen (LOX) supply. #AtlasV #Cygnus #OA7 #NASA

[tnt22]

‏ @CwG_NSF 40 сек. назад

Teams are now prepping the ground transfer Liquid Hydrogen lines for Centaur LH2 loading. #AtlasV #Cygnus #OA7 #NASA

[tnt22]

04/18/2017 16:20

Now at the 75 percent level on the Centaur upper stage's liquid oxygen tank.

04/18/2017 16:20

The chilldown conditioning of liquid hydrogen propellant lines at Complex 41 is starting to prepare the plumbing for transferring the Minus-423 degree F fuel into the rocket. The Centaur holds about 12,300 gallons of the cryogenic propellant.

[tnt22]

Tory Bruno‏Подлинная учетная запись @torybruno 2 мин. назад

Helium bottles are charged. LOX tanking underway. The board remains green. #OA7

[tnt22]

04/18/2017 16:24

The first stage liquid oxygen loading is transitioning from slow-fill to fast-fill mode

04/18/2017 16:25

The Centaur liquid oxygen tank reached the 96 percent level. The topping off process is starting now.

[tnt22]

‏ @CwG_NSF 1 мин. назад

Centaur upper stage in "topping" for LOX load. Atlas first stage LOX load just over 10%. All is going well. #AtlasV #Cygnus #OA7 #NASA

[tnt22]

04/18/2017 16:31

Centaur liquid oxygen tank has reached flight level.

04/18/2017 16:32

The Centaur engine chilldown sequence is being initiated.

[tnt22]

04/18/2017 16:37

The first stage liquid oxygen tank has reached the 40 percent mark.

[tnt22]

04/18/2017 16:40  L-minus 90 minutes

Everything continues to go very smoothly and the countdown is on schedule for the commercial OA-7 Cygnus launch aboard Atlas 5 at 11:11 a.m. EDT (1511 GMT).

[tnt22]

‏ @CwG_NSF 2 мин. назад

The Atlas first stage is now 50% full of its LOX load. #AtlasV #Cygnus #OA7 #NASA

[tnt22]

‏ @CwG_NSF 11 сек. назад

Centaur upper stage LH2 (Liquid Hydrogen) fueling has begun. #AtlasV #Cygnus #OA7 #NASA

[tnt22]

04/18/2017 16:44  Centaur LH2 loading

Chilldown of the liquid hydrogen system has been accomplished. The launch team has received the "go" to begin filling the Centaur upper stage with the supercold fuel.

[tnt22]

ISS Updates‏ @ISS101 49 сек назад

-253°C Liquid Hydrogen is now flowing into the Centaur upper stage, being loaded with 48,000 liters of fuel. The final step of prop load.

[tnt22]

 @CwG_NSF 2 мин. назад

Atlas LOX pump not working at planned. Tech issue. Anomaly team being convened at this time. #AtlasV #Cygnus #OA7 #NASA

[tnt22]

‏ @CwG_NSF 2 мин. назад

Teams are working a tech issue at this time. No word on what impact this might have to launch. #AtlasV #Cygnus #OA7 #NASA

[tnt22]

Фу-уууу!

 @CwG_NSF 35 сек. назад

Atlas LOX depletion sensors now showing odd spikes. Team say its normal. Other team says they'll "keep an eye on it." #AtlasV #Cygnus #OA7