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- Newsgroups: sci.space
- Path: sparky!uunet!europa.asd.contel.com!darwin.sura.net!aplcen.apl.jhu.edu!uars_mag!roelle
- From: roelle@uars_mag.jhuapl.edu (Curtis Roelle)
- Subject: Re: COSTAR
- Message-ID: <roelle.722210303@uars_mag>
- Sender: news@aplcen.apl.jhu.edu (USENET News System)
- Organization: Johns Hopkins University
- References: <Bxw7Hq.JtG.1@cs.cmu.edu>
- Distribution: sci
- Date: 19 Nov 92 21:58:23 GMT
- Lines: 27
-
- roberts@cmr.ncsl.nist.gov (John Roberts) writes:
-
-
- >-From: roelle@uars_mag.jhuapl.edu (Curtis Roelle)
- >-Subject: Re: COSTAR
- >-Date: 17 Nov 92 15:07:18 GMT
- >-Organization: Johns Hopkins University
-
- >-Has an assessment of potential risks has been prepared and reviewed?
- >-What could go wrong? Where are the primary risk areas? e.g. failure
- >-to grapple the telescope, failure to extract the module COSTAR
- >-replaces, engineering uncertainties that might lead to the new optical
- >-path missing the aperture opening, etc.
-
- [Amusing story about a sticky problem -- compressed ==> $%*& ]
-
- >Somewhat more plausible scenario - the mirrors only partially deploy,
- >blocking the original light paths, but not implementing the new light paths,
- >and efforts to retract them fail. (I presume they'll try to deploy while
- >HST is still attached to the Shuttle - if all else fails, a couple of burly
- >astronauts can try to yank the whole assembly out of HST.)
-
- What if they're not burly enough? Is there a contingency plan to retrieve
- HST from orbit if all fails, or, would it be jettisoned, even if that meant
- leaving it in a non-usable configuration?
-
- Curt Roelle
-