Author Topic: STS-125: Hubble servicing is ON - sources  (Read 23270 times)

Online Chris Bergin

RE: STS-125: Hubble servicing is ON - sources
« Reply #20 on: 10/29/2006 10:42 am »
Well I'm getting more info in all the time (Hubble mission is absolutely on, by the way), but it seems it is all about deorbiting now (in reference to LIDS). I believe LIDS is being "sold" as potential for another servicing mission, but Hubble is too sick - even after servicing - to last until Orion it would appear.
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Offline hektor

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Re: STS-125: Hubble servicing is ON - sources
« Reply #21 on: 10/29/2006 11:02 am »
That confirms anyway what I said elsewhere, that LIDS will be the only docking interface of Orion - no Orion with APAS.

Offline hektor

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Re: STS-125: Hubble servicing is ON - sources
« Reply #22 on: 10/29/2006 11:04 am »
Orion will have an airlock capability, in order to allow crew transfer from LSAM to Orion as last resort in case of Lunar orbital docking failure. If I remember well, the Constellation manifest foresees the demonstration of this capability during Orion 12.

Offline hektor

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Re: STS-125: Hubble servicing is ON - sources
« Reply #23 on: 10/29/2006 11:07 am »
Jim -

Did you look at the possibility to launch the rescue package before STS-125.

Expensive solution, I agree, costs one EELV.

Offline Jim

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Re: STS-125: Hubble servicing is ON - sources
« Reply #24 on: 10/29/2006 11:52 am »
No, It was a launch on need

Offline Jim

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Re: STS-125: Hubble servicing is ON - sources
« Reply #25 on: 10/29/2006 12:05 pm »
Quote
hektor - 29/10/2006  6:47 AM

Orion will have an airlock capability, in order to allow crew transfer from LSAM to Orion as last resort in case of Lunar orbital docking failure. If I remember well, the Constellation manifest foresees the demonstration of this capability during Orion 12.

To avoid misunderstandings.  There is no airlock on the CEV.  The whole cabin is depressurized just as Apollo

Offline Jim

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RE: STS-125: Hubble servicing is ON - sources
« Reply #26 on: 10/29/2006 12:06 pm »
Quote
Spirit - 29/10/2006  6:09 AM

Quote
http://www.nasaspaceflight.com/content/?cid=4881

Sources also note that Discovery will carry a passive LIDS (Low Impact Docking System) to be attached to Hubble's aft bulkhead. The requirement is to provide a capability to enable a future spacecraft to perform an autonomous rendezvous and docking with Hubble. This can be used for a future deorbit mission, or even another servicing mission via Orion.

Does Orion have an air-lock?


To avoid misunderstandings.  There is no airlock on the CEV.  The whole cabin is depressurized just as Apollo

Offline nathan.moeller

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Re: STS-125: Hubble servicing is ON - sources
« Reply #27 on: 10/29/2006 03:03 pm »
Quote
psloss - 27/10/2006  7:08 PM

Excerpt:
Quote
If two shuttle pads are available, planners believe a rescue flight could be launched with a week of the Hubble launch. If only one pad is available - and NASA currently plans to turn pad 39B over to the Constellation moon-Mars program next year - the best-case turnaround time is about 15 days.

In one scenario, sources say, the rescue shuttle would be moved to the launch pad, loaded with internal rocket fuel and then moved back to the Vehicle Assembly Building to make way for the Hubble launch. If a problem developed in orbit, the rescue shuttle then could be moved back out to the pad and quickly launched.

Wow yeah I read that a few hours after posting.  I had no idea they could whip the pad flow around like that for one pad.  Thanks for the enlightenment.  Let's up they won't need to though! ;)
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Offline Danderman

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Re: STS-125: Hubble servicing is ON - sources
« Reply #28 on: 10/29/2006 04:13 pm »
Quote
Jim - 28/10/2006  12:39 PM

Quote
Danderman - 28/10/2006  1:35 PM

Quote
Jim - 28/10/2006  6:58 AM
We were tasked to look a launching a rescue supply spacecraft on an ELV.  It would have O2 and such to extend the orbit  live of the orbiter while waiting for the rescue shuttle

How did that work for you?

I sure hope that the only launch vehicle that you looked at wasn't EELV, as mentioned here before.

EELV was the only way to make it work

What requirements did EELV meet that a Delta II could not meet?


Offline Jim

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Re: STS-125: Hubble servicing is ON - sources
« Reply #29 on: 10/29/2006 04:20 pm »
mass

Offline Delta Manager

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Re: STS-125: Hubble servicing is ON - sources
« Reply #30 on: 10/29/2006 04:20 pm »
"Did you look at the possibility to launch the rescue package before STS-125.

Expensive solution, I agree, costs one EELV."

I know this much, Hubble is not stable enough to facilitate this sort of mission. Non starter.

Offline Jim

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Re: STS-125: Hubble servicing is ON - sources
« Reply #31 on: 10/29/2006 04:26 pm »
The rescue mission was for a stranded orbiter after it repaired the HST.  The object is to put up supplies that allow the orbiter to last until the rescue one is ready.  This was due to the single pad.  Shutting down pad B later is cheaper and less risky, which is the way they are leaning

Offline hektor

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Re: STS-125: Hubble servicing is ON - sources
« Reply #32 on: 10/29/2006 04:52 pm »
Delta Manager -

I don't understand your comment. You don't need to attach the rescue package to the Hubble. You just need to put it in an orbit which allows the orbiter to go to it after launch - if  a damage is detected - while staying within the Orbiter propellant budget. So - very - theoretically you could preposition the package and launch STS-125 when it is there.

Jim -

Leads me to another philosophical question - would performing the Hubble servicing have a negative impact on the Orbiter lifetime in orbit, i.e. if a damage is detected and the rescue procedure decided, do you service Hubble no matter what or not ?

Offline Danderman

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Re: STS-125: Hubble servicing is ON - sources
« Reply #33 on: 10/29/2006 05:04 pm »
Quote
hektor - 29/10/2006  9:35 AM

Delta Manager -

I don't understand your comment. You don't need to attach the rescue package to the Hubble. You just need to put it in an orbit which allows the orbiter to go to it after launch - if  a damage is detected - while staying within the Orbiter propellant budget. So - very - theoretically you could preposition the package and launch STS-125 when it is there.

Prepositioning a rescue package has the problem that a long Shuttle delay would require significant station keeping by the rescue system over the period of the delay. That's a very expensive modification. Launch on need would seem to be the cheaper, albeit a little bit riskier, approach.

Offline hektor

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Re: STS-125: Hubble servicing is ON - sources
« Reply #34 on: 10/29/2006 05:15 pm »
This case is a good illustration of the difference between reliability, availability and safety. Could use it in lectures. The prepositioning option could probably be demonstrated to be safer - you don't depend on a launch success of the EELV, but the risk to lose the mission altogether is higher, you're right.

Offline Jim

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Re: STS-125: Hubble servicing is ON - sources
« Reply #35 on: 10/29/2006 07:49 pm »
It is LON.  If the shuttle doesn't need it, it is not launched

Offline hektor

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Re: STS-125: Hubble servicing is ON - sources
« Reply #36 on: 10/29/2006 08:05 pm »
I understood that part. I was talking hypothetically.

Offline dutch courage

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Re: STS-125: Hubble servicing is ON - sources
« Reply #37 on: 10/30/2006 02:12 pm »
NASA Administrator Michael Griffin will announce on Tuesday, Oct. 31, a decision on a space shuttle mission to service the Hubble Space Telescope. The announcement is scheduled for 10 a.m. EST during an agency-wide employee meeting from NASA's Goddard Space Flight Center, Greenbelt, Md. The event will be live on NASA TV and www.nasa.gov.

http://www.nasa.gov/home/hqnews/2006/oct/HQ_M06170_Hubble_Servicing_Mission.html


Online Chris Bergin

RE: STS-125: Hubble servicing is ON - sources
« Reply #38 on: 10/30/2006 03:44 pm »
Updated the article. Potential of using Atlantis on her final flight for this servicing/prep for future deorbit mission.
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Offline cozmicray

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Re: STS-125: Hubble servicing is ON - sources
« Reply #39 on: 10/30/2006 05:56 pm »
A Mission to fix HST robotically got to Preliminary Design Review, then got canceled.
HST Robotic Service & Deorbit Mission HRSDM
ELV launch, Autonomous rendesvous and docking with HST and tele robotic
repair and instrument replacement.


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