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#20
by
Artyom.
on 09 Jan, 2014 11:05
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Weather outlook has improved to 85% favorable at launch time.
Excellent! Thanks!
White-tailed deer graze near Antares rocket
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#21
by
Targeteer
on 09 Jan, 2014 11:25
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Expanding on the 85% chance of good weather from Facebook
NASA's Wallops Flight Facility
Weather forecast for today's launch has improved. At launch time we are looking at partly cloudy to mostly sunny. Temperature 42 degrees. Probability of acceptable weather for launch is 85%.
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#22
by
ppdebo
on 09 Jan, 2014 11:38
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#23
by
Zaran
on 09 Jan, 2014 12:13
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All stations are go for pre-launch processing.
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#24
by
Zaran
on 09 Jan, 2014 12:19
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Just past T-5 hours to launch, good morning Antares!
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#25
by
Artyom.
on 09 Jan, 2014 13:08
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T-4 hours
Orbital Sciences @OrbitalSciences#Antares #Cygnus launch operations continue. Trajectory Assessment based on T-7.5 hour balloon data is green.
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#26
by
Chris Bergin
on 09 Jan, 2014 13:24
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Orbital (on twitter, minus the stupid hashtags):
Ventilation of core O2 tank is progress. Warm helium is being supplied to the vehicle.
Prelaunch processing on the vehicle loading systems are underway. The LOX subcooler is being loaded with LN2.
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#27
by
Lee Jay
on 09 Jan, 2014 13:40
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The LOX subcooler is being loaded with LN2.
LOX boils at around 90K while LN2 boils at around 77K, which is why you can use liquid nitrogen to cool liquid oxygen below its boiling point.
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#28
by
Lee Jay
on 09 Jan, 2014 13:47
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Sounds like they're reentering the pad, I think to deal with a regulator that's creeping and that will end up out of range by launch time if they don't deal with it.
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#29
by
Zaran
on 09 Jan, 2014 14:37
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Red-Team are going to the pad to investigate a potential LOX leak.
Wallops Stream went offline as soon as it was mentioned.
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#30
by
Chris Bergin
on 09 Jan, 2014 15:01
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Orbital mentioning it:
Orbital engineering team being deployed to the pad to check on a LOX line leak issue.
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#31
by
Zaran
on 09 Jan, 2014 15:02
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Red-Team on site.
The leak seems to be related to a valve in a ground systems line, a short pause of 4 minutes in the countdown ops look place (15:58 to 16:01 UTC) while work was carried out.
No word on if the problem is resolved yet, launch window permits 4-5 minutes of delays on countdown ops at most.
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#32
by
jacqmans
on 09 Jan, 2014 15:06
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launch is still go....
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#33
by
Zaran
on 09 Jan, 2014 15:07
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LOX storage tank is to be pressurized ahead of chilldown operations.
Sounds like they are pressing ahead.
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#34
by
jacqmans
on 09 Jan, 2014 15:07
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for a normal countdown Orbital has 15 min built in of hold time, they now used 2 to 3 min to work this problem...
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#35
by
Artyom.
on 09 Jan, 2014 15:08
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T-2 hours
Orbital Sciences @OrbitalSciencesLOX leak was on a maintenance line, all checked out and we are proceeding with the countdown
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#36
by
Zaran
on 09 Jan, 2014 15:09
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for a normal countdown Orbital has 15 min built in of hold time, they now used 2 to 3 min to work this problem...
I was unaware of the 15 minute planned hold.
Orbital says all is fine via twitter: @OrbitalSciences: LOX leak was on a maintenance line, all checked out and we are proceeding with the countdown.
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#37
by
Chris Bergin
on 09 Jan, 2014 15:26
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T-90 min weather brief - all sounds good.
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#38
by
jacqmans
on 09 Jan, 2014 15:28
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Latest update from the Wallops press site. Everything still go..they have one small item they are looking at, but it is no show stopper... weather is green... at 11:40 press busses leave for viewing site...
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#39
by
Chris Bergin
on 09 Jan, 2014 15:33
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RP-1 storage tank pressure not coming up properly. Valve open issue.
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