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- Newsgroups: sci.space
- Path: sparky!uunet!convex!darwin.sura.net!wupost!gumby!destroyer!ncar!noao!stsci!stosc!zellner
- From: zellner@stsci.edu
- Subject: Re: COSTAR adjustments
- Message-ID: <1992Nov16.112815.1@stsci.edu>
- Lines: 20
- Sender: news@stsci.edu
- Organization: Space Telescope Science Institute
- References: <BxsM1p.Cw1.1@cs.cmu.edu>
- Distribution: sci,na
- Date: Mon, 16 Nov 1992 16:28:15 GMT
-
- In article <BxsM1p.Cw1.1@cs.cmu.edu>, roberts@cmr.ncsl.nist.gov (John Roberts)
- writes:
- >
- > Anything on what degrees of motion can be adjusted? (i.e. swing angle,
- > arm length, tilt, spacing.)
- >
-
- Basically, each optical channel of COSTAR is adjustable for focus, x-tilt,
- and y-tilt via stepper motors. After deployment, each mechanism will be
- scanned back and forth through a successively finer range, and images will
- be taken to find the best settings.
-
- The WFPC-2 should be installed at the same time as COSTAR and has stepper
- motors to adjust the pick-off mirror in x or y. Also the tip and tilt of
- fold mirrors inside three of the four cameras will be adjusted via electro-
- strictive devices - a bit of exotic technology, since there isn't room
- for stepper motors there.
-
- Ben
-
-