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#160
by
gocamels
on 08 Sep, 2006 11:40
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Live debate going on on 3 of 4 ECO sensor...ahhhh, PAO just pulled it
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#161
by
Chris Bergin
on 08 Sep, 2006 11:40
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psloss - 8/9/2006 12:16 PM
mkirk - 8/9/2006 7:06 AM
They want to make a decision prior to Crew Ingress!
I personally don't see them getting to the Launch Today Rationale because of the underlying assumptions of the current 3 of 4 rule. I have not heard from anyone to confirm if we are talking about two sensors as was posted here earlier...but if there are 2 sensors and the Point Sensor Box is the suspect we are no go for today - as I understood from the 121 flow.
Mark, a question about way the computers take the ECO data...at what point in ascent are the sensors normally "armed?"
Oh, yeah, the other question: what sequence of failures would cause them to be armed prior to that?
Thanks.
"The ECOs are normally armed when the ET 5% sensors go dry during flight (typically around 8 minutes 0 seconds)" - thanks to the source who saw the question and passed on the answer *waves*
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#162
by
ianeck
on 08 Sep, 2006 11:41
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I think I hear LeRoy Cain's voice (faintly) and I just heard a female voice say.."how can you say that...." sounds at least from a faint volume perspective like it's fairly heated (Watching NASA Tv on the net with headphones on).
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#163
by
ianeck
on 08 Sep, 2006 11:41
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I think I hear LeRoy Cain's voice (faintly) and I just heard a female voice say.."how can you say that...." sounds at least from a faint volume perspective like it's fairly heated (Watching NASA Tv on the net with headphones on).
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#164
by
psloss
on 08 Sep, 2006 11:43
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Chris Bergin - 8/9/2006 7:27 AM
"The ECOs are normally armed when the ET 5% sensors go dry during flight (typically around 8 minutes 0 seconds)" - thanks to the source who saw the question and passed on the answer *waves*
My thanks, too -- since that sensor also failed on the STS-121 tank, what's the condition to arm the sensors without the 5% sensor?
Edit: I'm assuming with the system biased to the LOX side, the 5% sensor on the LOX tank would be uncovered first and that sensor didn't fail on the STS-121 tank, but I'm curious if there's another indicator or whether it would be "computationally-based."
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#165
by
Chris Bergin
on 08 Sep, 2006 11:44
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Navaids NAVAIDS Activation - 24 minutes past the hour.
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#166
by
Chris Bergin
on 08 Sep, 2006 11:47
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coming up at 0700 Full MER Pre-Launch Team Call to Stations
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#167
by
psloss
on 08 Sep, 2006 11:48
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Chris Bergin - 8/9/2006 7:34 AM
coming up at 0700 Full MER Pre-Launch Team Call to Stations
That would be 0800 EDT, 1200 GMT.
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#168
by
mkirk
on 08 Sep, 2006 11:52
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Chris Bergin - 8/9/2006 6:27 AM
psloss - 8/9/2006 12:16 PM
mkirk - 8/9/2006 7:06 AM
They want to make a decision prior to Crew Ingress!
I personally don't see them getting to the Launch Today Rationale because of the underlying assumptions of the current 3 of 4 rule. I have not heard from anyone to confirm if we are talking about two sensors as was posted here earlier...but if there are 2 sensors and the Point Sensor Box is the suspect we are no go for today - as I understood from the 121 flow.
Mark, a question about way the computers take the ECO data...at what point in ascent are the sensors normally "armed?"
Oh, yeah, the other question: what sequence of failures would cause them to be armed prior to that?
Thanks.
"The ECOs are normally armed when the ET 5% sensors go dry during flight (typically around 8 minutes 0 seconds)" - thanks to the source who saw the question and passed on the answer *waves*
I have not been ignoring you I am just spread pretty thin this morning and I don’t have the time to put together a well worded/accurate response to what is a complex question. For now here is a link to a “backgrounder” I wrote a while back.
http://www.interspacenews.com/sections/In%20focus/ECO%20Sensors.htmBill Harwood wrote a better one in my opinion but you will have to find the link to that on your own.
If they don’t beet the question to death at the Post Launch / Scrub Press Conference I will try and provide a good answer in the Shuttle Q&A thread later today when things calm down.
Mark Kirkman
P.S.
It is a lot more complex than just the 5% sensors going dry.
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#169
by
Chris Bergin
on 08 Sep, 2006 11:52
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ET give go ahead to proceed to launch.
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#170
by
psloss
on 08 Sep, 2006 11:54
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mkirk - 8/9/2006 7:39 AM
I have not been ignoring you I am just spread pretty thin this morning and I don’t have the time to put together a well worded/accurate response to what is a complex question. For now here is a link to a “backgrounder” I wrote a while back.
No worries, Mark. As they usually say in a different context, "don't quit your day job."
We can have that discussion in the Q&A thread whenever things calm down (which doesn't sound like today).
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#171
by
DaveS
on 08 Sep, 2006 11:55
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Chris Bergin - 8/9/2006 1:39 PM
ET give go ahead to proceed to launch.
Is that console manned by MAF personell?
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#172
by
psloss
on 08 Sep, 2006 11:56
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Chris Bergin - 8/9/2006 7:39 AM
ET give go ahead to proceed to launch.
I'm not totally surprised, but wow...this has really turned into a unique launch campaign...
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#173
by
jacqmans
on 08 Sep, 2006 11:59
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4 min. before they restart the countdown...
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#174
by
Chris Bergin
on 08 Sep, 2006 12:01
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We're in a launch situation now. ECO sensor issue as it stands will not stop the launch, is what we're hearing.
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#175
by
Wisi
on 08 Sep, 2006 12:02
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T-3 hours and counting... looking forward very much to the launch!!
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#176
by
jacqmans
on 08 Sep, 2006 12:02
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#177
by
kraisee
on 08 Sep, 2006 12:03
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So what is the final rational to fly with the bad ECO sensor?
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#178
by
psloss
on 08 Sep, 2006 12:03
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Chris Bergin - 8/9/2006 7:48 AM
We're in a launch situation now. ECO sensor issue as it stands will not stop the launch, is what we're hearing.
I agree with what Mark wrote earlier -- there are going to be a lot of questions at whichever type of press briefing there is today.
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#179
by
Boston Shuttle Head
on 08 Sep, 2006 12:04
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Not sure anyone picked this up on CNN - for what it's worth.....
POSTED: 7:38 a.m. EDT, September 8, 2006
KENNEDY SPACE CENTER, Florida (CNN) -- The scheduled late-morning liftoff of space shuttle Atlantis on Friday is likely to be delayed by 24 hours, NASA program manager Wayne Hale told CNN.
http://www.cnn.com/2006/TECH/space/09/08/shuttle.launch/index.html
