Author Topic: LIVE: Delta IV Heavy: NRO L-26 - Jan 17, 09  (Read 140705 times)

Online William Graham

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Re: LIVE: Delta IV Heavy: NRO L-26 - Jan 17, 09
« Reply #520 on: 01/18/2009 01:30 AM »
Communication problem

Offline Jim

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Re: LIVE: Delta IV Heavy: NRO L-26 - Jan 17, 09
« Reply #521 on: 01/18/2009 01:30 AM »
Be thankful this is a four hour launch window. All these problems and failure to resolve what seems to be the previous problem would cause havoc if working to short windows.

Getting familiar with an potential Ares I  replacement?

Offline markopoloflight

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Re: LIVE: Delta IV Heavy: NRO L-26 - Jan 17, 09
« Reply #522 on: 01/18/2009 01:31 AM »
This is a very important project. I hope we go up very soon, and not have to wait again..   

Online William Graham

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Re: LIVE: Delta IV Heavy: NRO L-26 - Jan 17, 09
« Reply #523 on: 01/18/2009 01:31 AM »
Launch team has "a good understanding of the issue"

Offline Ford Mustang

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Re: LIVE: Delta IV Heavy: NRO L-26 - Jan 17, 09
« Reply #524 on: 01/18/2009 01:32 AM »
Two hours remaining in this launch window.  Hope to have a new T-0 shortly.

Online William Graham

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Re: LIVE: Delta IV Heavy: NRO L-26 - Jan 17, 09
« Reply #525 on: 01/18/2009 01:32 AM »
New T-0: 02:47:00
« Last Edit: 01/18/2009 01:32 AM by GW_Simulations »

Offline Nick L.

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Re: LIVE: Delta IV Heavy: NRO L-26 - Jan 17, 09
« Reply #526 on: 01/18/2009 01:32 AM »
Launch team "understands the issue". New T-0 shortly. If we hold again I am going to pass out...
"Now you may leave here for four days in space, but when you return it's the same old place..."

Offline Chris Bergin

Re: LIVE: Delta IV Heavy: NRO L-26 - Jan 17, 09
« Reply #527 on: 01/18/2009 01:32 AM »
New T-0: 02:47:00 Zulu (9:47pm Eastern).

Offline Andrewwski

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Re: LIVE: Delta IV Heavy: NRO L-26 - Jan 17, 09
« Reply #528 on: 01/18/2009 01:32 AM »
Launch team has "a good understanding of the issue"

That's what they said last time.  ::)
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Offline just-nick

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Re: LIVE: Delta IV Heavy: NRO L-26 - Jan 17, 09
« Reply #529 on: 01/18/2009 01:34 AM »
"The launch team appear to have a good understanding of the issue... again"

I'm not entirely sure about that.

The question -- and I think they are being unusually cagy about details on this launch -- is do they have a better understanding of the first issue or a good understanding of a second one?

I can see something like this "script abort" resulting from several different underlying problems.

Offline Ford Mustang

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Re: LIVE: Delta IV Heavy: NRO L-26 - Jan 17, 09
« Reply #530 on: 01/18/2009 01:34 AM »
Sequencer is running.  L-13 minutes.

Online William Graham

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Re: LIVE: Delta IV Heavy: NRO L-26 - Jan 17, 09
« Reply #531 on: 01/18/2009 01:34 AM »
Be thankful this is a four hour launch window. All these problems and failure to resolve what seems to be the previous problem would cause havoc if working to short windows.

Getting familiar with an potential Ares I  replacement?

Given the Delta IV's track record, the EDS won't so much need a 2 week "loiter window" as a 2 year window...

Online eeergo

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Re: LIVE: Delta IV Heavy: NRO L-26 - Jan 17, 09
« Reply #532 on: 01/18/2009 01:34 AM »
Frost on the topmost tanks (LO2?) has reduced its extent.

EDIT: Now that I think of it, shouldn't more ice be produced in the LH2 tanks, given it's colder?
« Last Edit: 01/18/2009 01:36 AM by eeergo »
-DaviD-

Offline Oberon_Command

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Re: LIVE: Delta IV Heavy: NRO L-26 - Jan 17, 09
« Reply #533 on: 01/18/2009 01:36 AM »
-- and I think they are being unusually cagy about details on this launch --

Could the problem possibly be with the payload itself then? Or would they tell us if that were the case?

Offline Lars_J

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Re: LIVE: Delta IV Heavy: NRO L-26 - Jan 17, 09
« Reply #534 on: 01/18/2009 01:36 AM »
Are all these small issues coming up due to the infrequency of Delta IV launches? They have only launched ~1 per year since the Delta IV became available. Not a very impressive flight rate.

Not enough attempts to work out all the bugs?
« Last Edit: 01/18/2009 01:37 AM by Lars_J »

Offline NUAETIUS

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Re: LIVE: Delta IV Heavy: NRO L-26 - Jan 17, 09
« Reply #535 on: 01/18/2009 01:36 AM »
Be thankful this is a four hour launch window. All these problems and failure to resolve what seems to be the previous problem would cause havoc if working to short windows.

Getting familiar with an potential Ares I  replacement?

Given the Delta IV's track record, the EDS won't so much need a 2 week "loiter window" as a 2 year window...

Would a human rating of this rocket increase or decrease the likelyhood of holds of this nature?
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Offline Ford Mustang

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Re: LIVE: Delta IV Heavy: NRO L-26 - Jan 17, 09
« Reply #536 on: 01/18/2009 01:36 AM »
L-10 minutes.

Offline Nick L.

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Re: LIVE: Delta IV Heavy: NRO L-26 - Jan 17, 09
« Reply #537 on: 01/18/2009 01:37 AM »
Are all these small issues coming up due to the infrequency of Delta IV launches? They have only launched ~1 per year since the Delta IV became available. Not a very impressive flight rate.


They launched 3 in 2006, that's their best so far. Those were all Mediums which seem to go easier than the Heavys.
"Now you may leave here for four days in space, but when you return it's the same old place..."

Offline Ford Mustang

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Re: LIVE: Delta IV Heavy: NRO L-26 - Jan 17, 09
« Reply #538 on: 01/18/2009 01:37 AM »
Polling underway.

Online eeergo

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Re: LIVE: Delta IV Heavy: NRO L-26 - Jan 17, 09
« Reply #539 on: 01/18/2009 01:37 AM »
-- and I think they are being unusually cagy about details on this launch --

Could the problem possibly be with the payload itself then? Or would they tell us if that were the case?

I don't think a payload issue would be so 'recyclable', or would crop up during the terminal count script.
-DaviD-

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