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

[tnt22]

SpaceFlight Insider‏ @SpaceflightIns 8 мин. назад

More about @OrbitalATK #OA7 #Cygnus. Image Credit: Orbital ATK

[tnt22]

04/18/2017 17:25  L-minus 45 minutes

A 30-minute launch window, spanning 15 minutes before and 15 minutes after the exact moment the station's orbital plane passes over the Complex 41 launch pad, is available for liftoff this morning.

Launch will be possible during any of five specific opportunities -- at every 7-minute 30-second interval -- that simplified the analytical work for mission control. The rocket's in-flight steering capabilities will be employed during ascent to guide Cygnus into the station's orbital plane:

Opportunity 1: 11:11:26 a.m. EDT
Opportunity 2: 11:18:56 a.m. EDT
Opportunity 3: 11:26:26 a.m. EDT
Opportunity 4: 11:33:56 a.m. EDT
Opportunity 5: 11:41:26 a.m. EDT

[tnt22]

04/18/2017 17:26

The fuel-fill sequence for the first stage main engine is underway.

[tnt22]

ISS Updates‏ @ISS101 35 сек назад

The two-chamber RD-180 engine has begun its Fuel Fill Sequence, priming the propellant lines for ignition.#Cygnus

[tnt22]

Chris B - NSF‏ @NASASpaceflight 2 мин. назад

Bob Cabana, being cool. It's what he does.

[che wi]

[tnt22]

 @CwG_NSF 2 мин. назад

Erratic voltage issue now requires entire anomaly team input. #AtlasV #Cygnus #OA7 #NASA

‏ @CwG_NSF 2 мин. назад

If liftoff occurs at 11:11a EDT today, ISS will be over the English Channel at time of launch. #AtlasV #Cygnus #OA7 #NASA

[che wi]

[tnt22]

04/18/2017 17:31
Engineers are assessing a possible voltage problem with one of the Range safety command-receivers on the rocket. 

04/18/2017 17:31  L-minus 40 minutes
Today's launch uses the 401 version of the Atlas 5 rocket, generating the necessary power to lift the eight-ton Cygnus spacecraft into its low-altitude, high-inclination Earth orbit.

It is the workhorse configuration of the Atlas 5, and is distinguished by two stages, a four-meter-wide nose cone, no side-mounted solid boosters and a single-engine Centaur upper stage.

The United Launch Alliance Atlas 5 rocket will come off the pad on 860,000 pounds of thrust produced by the RD-180 main engine.
It stands 194 feet tall.

The 401 has flown 35 times before.

[tnt22]

04/18/2017 17:34

Standing by to go into the final built-in hold.

[che wi]

[tnt22]

04/18/2017 17:37  Countdown in pre-planned hold

T-minus 4 minutes and holding. The countdown has entered the planned 30-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.

[tnt22]

ISS Updates‏ @ISS101 58 сек назад

All Tanks have been verified at flight level. RD-180 fuel fill sequence complete. Working an FTS electrical issue. #Cygnus

[tnt22]

04/18/2017 17:38

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

[tnt22]

‏ @CwG_NSF 1 мин.1 минуту назад

Anomaly team is still discussing the one outstanding tech issue (erratic voltage reading). #AtlasV #Cygnus #OA7 #NASA

[tnt22]

ISS Updates‏ @ISS101 13 сек назад

A final test of the Propellant Utilization Units on both stages is completed in preparation for terminal countdown. #Cygnus

[tnt22]

04/18/2017 17:41  L-minus 30 minutes

Just 30 minutes until liftoff time. Standing by for the final scheduled status check on the weather.

[tnt22]

04/18/2017 17:43  Weather is GO

Weather is observed and forecast GO for liftoff at 11:11 a.m. EDT (1511 GMT) today.

[tnt22]

SpaceFlight Insider‏ @SpaceflightIns 2 мин. назад

Teamwork makes the dream work - all the various teams supporting today's #OA7 launch. (Unlabeled = @OrbitalATK in Dulles, VA). Credits: NASA

[Max Andriyahov]

Повезёт что нибудь интересное? Или просто еда, одежда, зубная паста?