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- From: mccreary@sword.eng.hou.compaq.com (Ed McCreary)
- Subject: Re: Relay to Follow Galileo?
- Message-ID: <1992Dec15.151040.4535@twisto.eng.hou.compaq.com>
- Sender: news@twisto.eng.hou.compaq.com (Netnews Account)
- Organization: Compaq Computer Corp.
- References: <1992Dec14.034918.7060@mnemosyne.cs.du.edu> <71697@cup.portal.com>
- Date: Tue, 15 Dec 1992 15:10:40 GMT
- Lines: 29
-
- In article <71697@cup.portal.com> BrianT@cup.portal.com (Brian Stuart Thorn) writes:
- > Ryan...
- >
- > Galileo's umbrella-type High Gain Antenna was left in the folded
- > position because it was thought that the high temperatures it would
- > encounter during the Venus flyby portion of the mission could warp
- > the antenna. They attempted to open the antenna only after the Venus
- > flyby, when Galileo flew farther from the Sun. It was jammed.
-
- JPL planned from the start to furl the HGA. The original flight path
- went straight to Jupiter with a broken-plane manuver in the middle.
- The VEEGA path is a result of using the smaller IUS instead of a
- Centaur.
-
- > Cassini, I think, will have a standard hard HGA, similar to the
- > Voyager and Magellan antennae. I hope the Galileo problem does not
- > prevent future spacecraft from using the folding antenna design. It
- > worked quite well on the TDRS satellites.
- >
-
- True, and the test antenna for Galileo worked fine also. I don't know
- what the details are for Cassini though. Is it still considered to
- be Mariner Mk II or have they dumped that plan.
-
-
- --
- Ed McCreary ,__o
- mccreary@sword.eng.hou.compaq.com _-\_<,
- "If it were not for laughter, there would be no Tao." (*)/'(*)
-