home *** CD-ROM | disk | FTP | other *** search
- Newsgroups: sci.space
- Path: sparky!uunet!enterpoop.mit.edu!usc!elroy.jpl.nasa.gov!kelvin.jpl.nasa.gov!baalke
- From: baalke@kelvin.jpl.nasa.gov (Ron Baalke)
- Subject: Re: Galileo's high-gain antenna still stuck
- Message-ID: <3JAN199319135025@kelvin.jpl.nasa.gov>
- News-Software: VAX/VMS VNEWS 1.41
- Keywords: Galileo, JPL
- Sender: news@elroy.jpl.nasa.gov (Usenet)
- Nntp-Posting-Host: kelvin.jpl.nasa.gov
- Organization: Jet Propulsion Laboratory
- References: <1992Dec30.223543.23648@news.arc.nasa.gov> <C0443L.8w2@news.iastate.edu> <2JAN199323293310@kelvin.jpl.nasa.gov> <1993Jan3.182812.13825@elroy.jpl.nasa.gov>
- Date: Sun, 3 Jan 1993 19:13:00 GMT
- Lines: 32
-
- In article <1993Jan3.182812.13825@elroy.jpl.nasa.gov>, pjs@euclid.jpl.nasa.gov writes...
- >In article <1993Jan2.234235.16100@ee.ubc.ca>, davem@ee.ubc.ca (Dave Michelson) writes:
- >> In article <2JAN199323293310@kelvin.jpl.nasa.gov> baalke@kelvin.jpl.nasa.gov (Ron Baalke) writes:
- >> >The hammering sessions will continue all the way through the entire month
- >> >of January, if necessary. Even though the first hammering attempt didn't
- >> >open up the antenna all the way, it did have a postive effect.
- >>
- >> !! It did? I sure don't remember seeing reference to that in the last
- >> report but I'm glad to hear it.
- >>
- >> What was the "positive effect"? How was it determined or measured?
- >
- >The GLL nav team chief told me the other day that although nothing
- >had unfurled, the degree of bowing had increased. This was determined
- >from sun sensor data. On the premise that any movement is better than
- >none, this is a positive effect. They're quite prepared to break the
- >HGA if necessary, assuming they can.
-
- The sun sensor data has indicated that the hammering has affected the
- antenna in some way. Either the tension on the antenna has been increased
- or a rib has sprung loose, it cannot be determined which way at this point.
- Some clarification on "breaking the HGA". The two motors may apply enough
- force to be able to break the stuck ribs, but having an open High Gain
- antenna with a couple of broken ribs is a much better situation than having
- to use the Low Gain antenna by itself.
- ___ _____ ___
- /_ /| /____/ \ /_ /| Ron Baalke | baalke@kelvin.jpl.nasa.gov
- | | | | __ \ /| | | | Jet Propulsion Lab |
- ___| | | | |__) |/ | | |__ M/S 525-3684 Telos | Choose a job you love, and
- /___| | | | ___/ | |/__ /| Pasadena, CA 91109 | you'll never have to work
- |_____|/ |_|/ |_____|/ | a day in your life.
-
-