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- Newsgroups: sci.space
- Path: sparky!uunet!wupost!emory!kd4nc!ke4zv!gary
- From: gary@ke4zv.uucp (Gary Coffman)
- Subject: Re: satellite costs etc.
- Message-ID: <1992Dec31.002900.11894@ke4zv.uucp>
- Reply-To: gary@ke4zv.UUCP (Gary Coffman)
- Organization: Destructive Testing Systems
- References: <BzMwDx.KGw@zoo.toronto.edu> <1992Dec23.111923.22269@ke4zv.uucp> <BzqBvs.J8H@zoo.toronto.edu> <1hfromINN3a5@mirror.digex.com>
- Date: Thu, 31 Dec 1992 00:29:00 GMT
- Lines: 29
-
- In article <1hfromINN3a5@mirror.digex.com> prb@access.digex.com (Pat) writes:
- >In article <BzqBvs.J8H@zoo.toronto.edu> henry@zoo.toronto.edu (Henry Spencer) writes:
- >
- >Actually, henry. both of you are sticking to the clarke orbit model.
- >
- >Most of the effort in the Telecom industry is oriented towards
- >LEO comm sats. store and forward or multiple fast relay satellittes.
- [deleted]
- >Oncve again, for LEO commsats, rendevous is quite feasible.
- >
- >you could even use the shuttle to grab them up.
-
- I'd note that we haven't actively been using LEO commsats since Telestar
- for video or other high bandwidth downlinks. The Iridium concept is a
- narrow band quasi-cellular phone proposal. Seamless handoff for video
- and high bandwidth data is a thorny problem, but can likely be solved
- as we move from analog to digital transmissions. High bandwidth still
- requires high link budgets, however, and Earth stations are not necessarily
- going to get cheaper unless the satellites get much more powerful, and
- larger, than is currently projected for LEO. Clarke orbit has the real
- advantage of allowing high gain fixed dishes to set the link margin.
-
- Gary
-
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