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- From: roberts@cmr.ncsl.nist.gov (John Roberts)
- Newsgroups: sci.space
- Subject: Payload return from orbit
- Message-ID: <C04LE5.4t1.1@cs.cmu.edu>
- Date: 31 Dec 92 13:27:05 GMT
- Article-I.D.: cs.C04LE5.4t1.1
- Sender: news+@cs.cmu.edu
- Distribution: sci
- Organization: National Institute of Standards and Technology formerly National Bureau of Standards
- Lines: 42
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- Original-Sender: isu@VACATION.VENARI.CS.CMU.EDU
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-
- -From: wingo%cspara.decnet@Fedex.Msfc.Nasa.Gov
- -Subject: Re: Stupid Shut Cost arguements (was Re: Terminal Velocity
- -Date: 31 Dec 92 02:05:00 GMT
- -Organization: University of Houston
-
- -In article <1992Dec30.205940.28699@iti.org>, aws@iti.org (Allen W. Sherzer) writes...
- ->> GRO and UARS are both candidates for return to earth.
- ->
- ->Doing that would cost more then they are worth. It would be cheaper to
- ->build new ones and launch them commercially.
-
- -I would dearly love to see your cost analysis on this Allen. Since the
- -marginal cost for a Shuttle mission is only 37 million dollars, this is
- -what it would cost for a reflight.
-
- I think it would be more fair to use the $400-500 million figure, unless
- there just happens to be a time slot where there's an orbiter available
- but no other payload ready. It might be more worthwhile to use such a slot
- to refly ASTRO or TSS.
-
- -By the way your Titan IV cannot lift
- -a payload like HST due to its adverse dynamic envelope.
-
- So what is the dynamic envelope of Titan IV?
-
- ->> The Hubble repair could still prove too much for orbiting
- ->> astronauts and thus require return to Earth for mirror replacement,
- ->
- ->No for two reasons: 1) it would be cheaper to build another and fly it
- ->and 2) in testimony before the House the program manager said Hubble
- ->wouldn't survive the return trip.
-
- -For 1) see the above. For 2) from what I have heard from the HST program
- -manager at Marshall, they could bring it back down. That is a contingency if
- -the solar array replacement goes awry.
-
- I think the general attitude is that HST could *probably* be returned safely,
- but they would greatly prefer not to, for a variety of reasons.
-
- John Roberts
- roberts@cmr.ncsl.nist.gov
-