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Article #4212Re: Spy Satellites Again
From: Phil R. Karn
Date: Tue, 03 May 1988 20:29
Date: Tue, 03 May 1988 20:29
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> "Satellites hundreds of miles in space that can detect ground > objects less than an inch wide." > > Anyone care to comment? Strictly speaking, this is a true statement. Most stars are far smaller than the diffraction-imposed resolution limit, but telescopes and eyes have little trouble seeing them, albeit as "blobs" that appear much larger than they really are. You aren't really "imaging" them. And I don't know whether this is relevant to seeing objects on the ground that only reflect ambient light. Phil
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arc1-ca.pugleaf.net!utzoo!mnetor!uunet!husc6!bloom-beacon!tut.cis.ohio-state.edu!mailrus!umix!umich!mibte!gamma!ulysses!thumper!karnReferences:
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Path: arc1-ca.pugleaf.net!utzoo!mnetor!uunet!husc6!bloom-beacon!tut.cis.ohio-state.edu!mailrus!umix!umich!mibte!gamma!ulysses!thumper!karn From: karn@thumper.bellcore.com (Phil R. Karn) Newsgroups: sci.crypt Subject: Re: Spy Satellites Again Message-ID: <1066@thumper.bellcore.com> Date: 3 May 88 20:29:40 GMT References: <23855@ucbvax.BERKELEY.EDU> Organization: Bell Communications Research, Inc Lines: 13 Summary: detect != resolve