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- Newsgroups: sci.space
- Path: sparky!uunet!gumby!destroyer!cs.ubc.ca!newsserver.sfu.ca!news
- From: palmer@sfu.ca (Leigh Palmer)
- Subject: Re: Galileo HGA: Hypothesis
- Message-ID: <1992Nov20.000916.4853@sfu.ca>
- Sender: news@sfu.ca
- Organization: Simon Fraser University
- References: <1992Nov10.140620.8359@cc.umontre> <246900037@peg.pegasus.oz.au>
- Date: Fri, 20 Nov 1992 00:09:16 GMT
- Lines: 40
-
- In article <246900037@peg.pegasus.oz.au> wlmss@peg.pegasus.oz.au writes:
- >
- >
- >
- > Another naive query about Galileo's HGA problem.
- >
- > Can it send data at a high rate but with little power?
- >
- > If so, what if a relay craft were sent after it to gather and
- > send information back at the intended rate?
- >
- > Would this work?
- >
- >
- > o < < < < < < < < < < < < )-x . . . . )-G
- >
- > earth relay Galileo
- >
-
- Sure, but how are you going to *keep* the relay at that point between Earth and
- Galileo? You'd pretty much have to put it in orbit around Jupiter or place it
- in the inner Lagrangian point. In any smaller orbit it'd orbit faster than
- Jupiter, and thus spend most of its time at least as far from Galileo as Earth
- is now.
-
- Another idea: Put a really large radiotelescope in Earth orbit and hook it to
- the Deep Space Network. I saw a marvelous scheme for doing this once in a story
- about nitinol, the memory alloy. One makes a flimsy lacework paraboloidal
- antenna which has a conductive path arranged such that applied current flows
- through all the nitinol wires in the structure. It is fabricated at high
- temperature and then cooled off, wadded into a much smaller package, and
- shipped to orbit. Once there a large current throgh the wires restores the
- paraboloid to its original shape!
-
- Oh well, so much for the science fiction writing today. I'll go finish marking
- exams.
-
- Leigh
-
- Leigh
-