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

[tnt22]

04/18/2017 16:52

Centaur's liquid hydrogen tank is 20 percent full. The cryogenic propellant will be consumed with liquid oxygen by the stage's Aerojet Rocketdyne-made RL10 engine.

[tnt22]

04/18/2017 16:55

First stage liquid oxygen tank is 80 percent full thus far. Chilled to Minus-298 degrees F, the liquid oxygen will be used with RP-1 kerosene by the RD-180 main engine on the first stage during the initial four minutes of flight today. The 25,000 gallons of RP-1 were loaded into the rocket after rollout yesterday.

[tnt22]

ТБМ!

 @CwG_NSF 30 сек. назад

Another issue now being worked. LOX leak from chilldown line. Anomaly team convened to provide recommendation. #AtlasV #Cygnus #OA7 #NASA

[tnt22]

ISS Updates‏ @ISS101 1 мин назад

The Launch Team is keeping a close eye on first stage LOX load after seeing some suspect sensor readings and a leak from a chilldown line

[tnt22]

Трансляция началась

[tnt22]

ISS Updates‏ @ISS101 41 сек41 секунд назад

Anomaly team has convened to look at the chilldown line issue. LOX load proceeding for now, just passed 90%. #Cygnus

[tnt22]

‏ @CwG_NSF[/url] 3 мин. назад

To consolidate: Anomaly team is investigating 2 issues: LOX pump on Atlas first stage and LOX leak on chilldown line. #AtlasV #Cygnus #OA7

[tnt22]

04/18/2017 17:01
Centaur LH2 now at 90 percent.

04/18/2017 17:03
The liquid hydrogen tank in the Centaur upper stage just reached the 96 percent level. Topping is beginning.

[tnt22]

ISS Updates‏ @ISS101 3 мин назад

Final Open-Loop Tests of the Flight Termination System are now being conducted to ensure the system is functional. #Cygnus

[tnt22]

ISS Updates‏ @ISS101 2 мин. назад

All tanks have reached topping. #AtlasV #Cygnus

[tnt22]

04/18/2017 17:05


04/18/2017 17:06

The 720,000-pound Atlas 5 rocket now stands fueled for launch as the countdown continues on schedule for a liftoff at 11:11:26 a.m. EDT (1511:26 GMT).

[tnt22]

04/18/2017 17:10  L-60 minutes and counting

Now 60 minutes from liftoff. This Cygnus spacecraft weighs 15,928 pounds, and it is loaded with 7,443 pounds of internal cargo and an 183-pound external deployer for cubesats.

[tnt22]

04/18/2017 17:11  Rocketcam

[tnt22]

04/18/2017 17:12

Atlas first stage LOX tank at 100 percent.

[tnt22]

ISS Updates‏ @ISS101 3 мин назад

The cryo tanks went through fill & drain valve cycle tests to make sure no valves are sticking. Topping has resumed. #Cygnus

[tnt22]

‏ @CwG_NSF 46 сек. назад

Both TECH issues that were being worked are CLEARED. No issues being worked at this time. #AtlasV #Cygnus #OA7 #NASA

[tnt22]

ISS Updates‏ @ISS101 4 сек назад
 
Also proceeding after the LOX leak observation, appeared to be a temporary problem. Team will continue monitoring. #Cygnus

[tnt22]

Chris B - NSF‏ @NASASpaceflight 1 мин. назад

Full report on the clearances: https://forum.nasaspaceflight.com/index.php?topic=41564.msg1668375#msg1668375 ...

[tnt22]

ТБМ!

‏ @CwG_NSF 1 мин. назад

NEW issue now being worked. Erratic voltage during testing. Anomaly team being convened. #AtlasV #Cygnus #OA7 #NASA

[tnt22]

04/18/2017 17:20  L-minus 50 minutes

Now 50 minutes from liftoff. Today marks the 71st flight for Atlas 5, born of the Air Force's competition to develop next-generation Evolved Expendable Launch Vehicles. In its previous 70 missions since debuting in August 2002, the Atlas 5 has flown 26 flights dedicated to the Defense Department, 16 commercial missions, 14 for NASA and 14 for the National Reconnaissance Office.