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- Newsgroups: sci.space
- Path: sparky!uunet!gatech!emory!wa4mei!ke4zv!gary
- From: gary@ke4zv.uucp (Gary Coffman)
- Subject: Re: DoD launcher use
- Message-ID: <1992Dec23.111923.22269@ke4zv.uucp>
- Reply-To: gary@ke4zv.UUCP (Gary Coffman)
- Organization: Gannett Technologies Group
- References: <1992Dec14.221347.3359@iti.org> <1992Dec16.092029.27518@ke4zv.uucp> <1992Dec16.202219.2063@eng.umd.edu> <1gvlmnINN9c@mirror.digex.com> <72109@cup.portal.com> <BzMwDx.KGw@zoo.toronto.edu>
- Date: Wed, 23 Dec 1992 11:19:23 GMT
- Lines: 31
-
- In article <BzMwDx.KGw@zoo.toronto.edu> henry@zoo.toronto.edu (Henry Spencer) writes:
- >In article <72109@cup.portal.com> BrianT@cup.portal.com (Brian Stuart Thorn) writes:
- >>>we should look to develope cheap sats to go with DC-1.
- >>>
- >> I thought we were already developing cheap sats, but these are to
- >> go up with Pegasus, Taurus, etc.
- >
- >There's cheap and there's cheap. The satellites being developed for
- >Pegasus etc. are *relatively* cheap because they're small... but they
- >still (usually) cost millions each, and they're typically built to the
- >same gold-plated zero-failures ten-year-life specs. Drop prices by
- >two orders of magnitude (not out of the question for DC-1) and many
- >things would have to change.
-
- Satellite costs have dropped dramatically since Sputnik in capability
- per dollar, both in space and at the Earth stations that use them.
- The absolute cost of satellites has increased, but their capabilities
- have increased at a much greater rate. A ten year life zero defects
- GEO comsat like K2 is much cheaper than a 1 year life package
- that costs 20 times less. That's because most of the investment is
- not in the satellite, it's in the Earth based terminals that use it.
- Satellites cheap in the absolute dollars sense are only cheap in the
- systems sense if their capability per dollar is high and their reliable
- delivery of wanted services is high. Since the satellite represents
- a single point failure node in the system, and since for most orbits
- the satellites aren't retrievable or repairable, and DC won't change
- that, gold plated zero failure satellites will continue to be the
- cheapest approach for many systems uses.
-
- Gary
-
-