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#200
by
WHAP
on 25 May, 2010 03:23
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Did anyone catch what happened?
I only heard script abort.
I thought I heard "map" or "mapi" or something similar in the background. Any idea what that might be?
It's MAP or MAPS scripts. Don't know what the acronym stands for, maybe something like Master Auto Program - probably just a name.
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#201
by
Satori
on 25 May, 2010 03:23
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We have 8 minutes of window time remaining...
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#202
by
Ronsmytheiii
on 25 May, 2010 03:23
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I hear detanking, so scrub
PAO confirms
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#203
by
Nick L.
on 25 May, 2010 03:23
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Yep, it's a scrub.
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#204
by
William Graham
on 25 May, 2010 03:23
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Detanking.
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#205
by
Satori
on 25 May, 2010 03:24
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Well, that's all for today
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#206
by
Ronsmytheiii
on 25 May, 2010 03:24
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#207
by
ChrisGebhardt
on 25 May, 2010 03:25
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If this is an abort/scrub, think that they will not try again until Atlantis lands
They don't have a choice. Range has to reconfigure for Atlantis' landing.
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#208
by
Antares
on 25 May, 2010 03:25
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IIRC 48 hr scrub to recycle the SRB hydraulics. Serious pucker factor in the DOC tonight.
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#209
by
Nick L.
on 25 May, 2010 03:25
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Yep, "MAP script abort" was what it was.
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#210
by
WHAP
on 25 May, 2010 03:25
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If this is an abort/scrub, think that they will not try again until Atlantis lands
Agreed - but will that be after SpaceX? If this was the last attempt before the landing, and SpaceX has the 28th, I don't see Delta having the chance to go until the 30th. Of course, they could always negotiate with SpaceX - assuming Falcon is ready to go.
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#211
by
Ronsmytheiii
on 25 May, 2010 03:27
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If this is an abort/scrub, think that they will not try again until Atlantis lands
Agreed - but will that be after SpaceX? If this was the last attempt before the landing, and SpaceX has the 28th, I don't see Delta having the chance to go until the 30th. Of course, they could always negotiate with SpaceX - assuming Falcon is ready to go.
SpaceX wont be ready by then
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#212
by
WHAP
on 25 May, 2010 03:27
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Looking at ron's capture, looks like venting started right at T-10 seconds (my guess for the abort time). They counted further, but the abort may not have registered at the announcer's console yet. Not sure if that's really possible, though.
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#213
by
Chris Bergin
on 25 May, 2010 03:28
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Well that was interesting!
What do we reckon for the hold time? I had them down to about T-7 seconds, but that's the time the controller gave the hold call.
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#214
by
Nick L.
on 25 May, 2010 03:30
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Did the vehicle/ground computer initiate the venting on its own, upon recognizing the problem?
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#215
by
WHAP
on 25 May, 2010 03:32
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Did the vehicle initiate the venting on its own, upon recognizing the problem?
Probably not without a signal for the abort from the ground. But I don't know how Delta's vent valve is controlled.
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#216
by
WHAP
on 25 May, 2010 03:34
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Did the vehicle/ground computer initiate the venting on its own, upon recognizing the problem?
It's unlikely that the vent valve has any other control source than the vehicle or the ground.
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#217
by
ChrisGebhardt
on 25 May, 2010 03:48
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From Larry who was at the Press Site: "There was a LARGE flame out from the H2 burnoff flame stack just before the HOLD, HOLD, HOLD call came through."
This sounds very similar to a Delta IV-Heavy abort I witnessed in January 2009 when a LARGE flame out of the H2 burnoff stack was seen followed immediately by a "HOLD, HOLD, HOLD" call.
Any thoughts?
EDIT: Obviously not a cause as Chris B has just posted the cause. But still, what could cause this "Flame out."
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#218
by
Chris Bergin
on 25 May, 2010 03:52
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ULA/USAF Joint Statement:
Delta IV GPS IIF SV-1 Mission Tentatively Rescheduled for May 27
Cape Canaveral AFS, Fla. (May 24, 2010) - The launch attempt of the United Launch Alliance Delta IV with the Air Force’s Global Positioning System IIF SV-1 satellite (GPS IIF SV-1) was scrubbed tonight. During the final seconds of the launch countdown, an anomalous data signature with the thrust vector control system on one of the two solid rocket motors mounted to the Delta IV booster was detected. The thrust vector control system is used to steer the SRMs during flight. The data signature triggered an automatic abort in the launch countdown scrubbing tonight’s launch attempt. Mission managers are currently studying the situation to determine a corrective action plan.
The Delta IV rocket and GPS IIF SV-1 satellite are safe and secure at this time. The next launch attempt has been tentatively set for Thursday. When a decision is made determining the next launch attempt it will be announced. The launch window for Thursday is 11:00 -11:19 p.m. EDT.
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#219
by
edkyle99
on 25 May, 2010 03:55
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From Larry who was at the Press Site: "There was a LARGE flame out from the H2 burnoff flame stack just before the HOLD, HOLD, HOLD call came through."
This sounds very similar to a Delta IV-Heavy abort I witnessed in January 2009 when a LARGE flame out of the H2 burnoff stack was seen followed immediately by a "HOLD, HOLD, HOLD" call.
Any thoughts?
Sounds like gaseous hydrogen being vented immediately after an abort.
- Ed Kyle
