Author Topic: LIVE: Delta IV Heavy: NRO L-26 - Jan 17, 09  (Read 135980 times)

Offline Avron

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Re: LIVE: Delta IV Heavy: NRO L-26 - Jan 17, 09
« Reply #420 on: 01/18/2009 12:17 AM »
Assessing another try tonight.

Did hear a go for recycle..

Offline Nick L.

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Re: LIVE: Delta IV Heavy: NRO L-26 - Jan 17, 09
« Reply #421 on: 01/18/2009 12:17 AM »
Something about "solid motor safe and arm to safe". 

Solid motor?

 - Ed Kyle

Sep motors for the strap-ons I think.
"Now you may leave here for four days in space, but when you return it's the same old place..."

Offline Jim

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Re: LIVE: Delta IV Heavy: NRO L-26 - Jan 17, 09
« Reply #422 on: 01/18/2009 12:18 AM »
I saw a huge ball of flame come out of the flare stack right after the hold was called, is there a chance this may have been related to what cause the hold, or an after-effect?

Neither, it was from shutting down LH2 replenishment.  The LH2 in the umbilicals and cross country lines has to go somewhere

Offline ringshot

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Re: LIVE: Delta IV Heavy: NRO L-26 - Jan 17, 09
« Reply #423 on: 01/18/2009 12:19 AM »
I saw a huge ball of flame come out of the flare stack right after the hold was called, is there a chance this may have been related to what cause the hold, or an after-effect?

That happens when they reopen the boiloff/relief valves (which are secured for launch).  You get a burst of GH2.

G'Day...Ron
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Online eeergo

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Re: LIVE: Delta IV Heavy: NRO L-26 - Jan 17, 09
« Reply #424 on: 01/18/2009 12:19 AM »
Assessing another try tonight.

Did hear a go for recycle..

Yes, but I think they have to fully safe and reconfigure the vehicule, and assess the failure.
-DaviD-

Offline Ford Mustang

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Re: LIVE: Delta IV Heavy: NRO L-26 - Jan 17, 09
« Reply #425 on: 01/18/2009 12:20 AM »
A hold was triggered by a computer.  Trying to recycle back to T-5 minutes.  They will then assess the problem, once this is done, they will see if re-initiation is possible.
« Last Edit: 01/18/2009 12:21 AM by Ford Mustang »

Offline Nick L.

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Re: LIVE: Delta IV Heavy: NRO L-26 - Jan 17, 09
« Reply #426 on: 01/18/2009 12:20 AM »
Problem detected by the launch computer (TCSR? or is that only in the last 8.5 seconds?)
« Last Edit: 01/18/2009 12:22 AM by Nick L. »
"Now you may leave here for four days in space, but when you return it's the same old place..."

Offline Avron

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Re: LIVE: Delta IV Heavy: NRO L-26 - Jan 17, 09
« Reply #427 on: 01/18/2009 12:22 AM »
Jim are we in a hold now or in a recycle step to a hold?

Offline Jim

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Re: LIVE: Delta IV Heavy: NRO L-26 - Jan 17, 09
« Reply #428 on: 01/18/2009 12:23 AM »
Problem detected by the launch computer (TCSR?)

too early for TCSR

Offline Swatch

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Re: LIVE: Delta IV Heavy: NRO L-26 - Jan 17, 09
« Reply #429 on: 01/18/2009 12:23 AM »
This seems to be a fairly large launch window.  What were the limiting factors for this window?   Is it likely Range related?  It certainly doesn't seem to be orbit limited, as over the course of that window, many orbit windows are possible.
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Re: LIVE: Delta IV Heavy: NRO L-26 - Jan 17, 09
« Reply #430 on: 01/18/2009 12:23 AM »
Propellants ready to support launch.
-DaviD-

Offline Avron

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Re: LIVE: Delta IV Heavy: NRO L-26 - Jan 17, 09
« Reply #431 on: 01/18/2009 12:26 AM »
What is Item 20.. and who has to be "sent in "

Offline charlieb

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Re: LIVE: Delta IV Heavy: NRO L-26 - Jan 17, 09
« Reply #432 on: 01/18/2009 12:26 AM »
Problem detected by the launch computer (TCSR?)

too early for TCSR

Seems to me a script starts running at T-5 (like ones I built for Ariane launches some years ago), and this hold was detected within the script (what ever it's name is); & my ? then is when does the TCSR come in and 'take over'?
Former Shuttle Mission Ops Eng  (In them days DF24 - INCO GROUP/COMMS, Now DS231-AVIONICS BRANCH).

Offline Jim

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Re: LIVE: Delta IV Heavy: NRO L-26 - Jan 17, 09
« Reply #433 on: 01/18/2009 12:26 AM »
This seems to be a fairly large launch window.  What were the limiting factors for this window?   Is it likely Range related?  It certainly doesn't seem to be orbit limited, as over the course of that window, many orbit windows are possible.

launch crew

Offline Nick L.

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Re: LIVE: Delta IV Heavy: NRO L-26 - Jan 17, 09
« Reply #434 on: 01/18/2009 12:27 AM »
Problem detected by the launch computer (TCSR?)

too early for TCSR

Seems to me a script starts running at T-5 (like ones I built for Ariane launches some years ago), and this hold was detected within the script (what ever it's name is); & my ? then is when does the TCSR come in and 'take over'?

TCSR comes in at about 8.5 seconds. Jim is that right?
« Last Edit: 01/18/2009 12:27 AM by Nick L. »
"Now you may leave here for four days in space, but when you return it's the same old place..."

Offline charlieb

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Re: LIVE: Delta IV Heavy: NRO L-26 - Jan 17, 09
« Reply #435 on: 01/18/2009 12:28 AM »
Problem detected by the launch computer (TCSR?)

too early for TCSR

Seems to me a script starts running at T-5 (like ones I built for Ariane launches some years ago), and this hold was detected within the script (what ever it's name is); & my ? then is when does the TCSR come in and 'take over'?

TCSR comes in at about 8.5 seconds.

Ahh - the terminal sequencer.... Tks.....
Former Shuttle Mission Ops Eng  (In them days DF24 - INCO GROUP/COMMS, Now DS231-AVIONICS BRANCH).

Offline Jim

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Re: LIVE: Delta IV Heavy: NRO L-26 - Jan 17, 09
« Reply #436 on: 01/18/2009 12:28 AM »
Problem detected by the launch computer (TCSR?)

too early for TCSR

Seems to me a script starts running at T-5 (like ones I built for Ariane launches some years ago), and this hold was detected within the script (what ever it's name is); & my ? then is when does the TCSR come in and 'take over'?

TCSR comes in at about 8.5 seconds.

Ahh - the terminal sequencer.... Tks.....
Terminal countdown sequencer rack

Offline Jim

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Re: LIVE: Delta IV Heavy: NRO L-26 - Jan 17, 09
« Reply #437 on: 01/18/2009 12:29 AM »
Problem detected by the launch computer (TCSR?)

too early for TCSR

Seems to me a script starts running at T-5 (like ones I built for Ariane launches some years ago), and this hold was detected within the script (what ever it's name is); & my ? then is when does the TCSR come in and 'take over'?

TCSR comes in at about 8.5 seconds.

Ahh - the terminal sequencer.... Tks.....

I left my countdown book at work

Offline Swatch

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Re: LIVE: Delta IV Heavy: NRO L-26 - Jan 17, 09
« Reply #438 on: 01/18/2009 12:29 AM »
launch crew

Haha, thanks Jim.   As a college student, I've forgotten simple things such as sleep.
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Online William Graham

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Re: LIVE: Delta IV Heavy: NRO L-26 - Jan 17, 09
« Reply #439 on: 01/18/2009 12:31 AM »
Sounds like they're either ready to resume when the problem is resolved, or they've resolved the problem and they're waiting to get to a point where they are ready to resume.

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