Article View: sci.space
Article #7867Re: satellites
From: Phil R. Karn
Date: Mon, 11 Jan 1988 23:08
Date: Mon, 11 Jan 1988 23:08
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> On the other hand, several public sources have reported that > resolutions good enough to read the brand of coffin nails > being smoked by the guard on duty in Moscow are in use. Nonsense, assuming you're talking about orbiting reconaissance satellites (as opposed to low-flying aircraft). Do a little math and determine the visible-light resolution limit of a 2-meter diameter mirror (roughly the largest that could be comfortably carried inside the payload fairing of a Titan from Vandenburg) at a distance of 500 miles (the perigee of a KH-11 orbit plus allowance for slant range). You'll end up with something on the order of a foot, which just so happens to be the resolution of the KH-11 aircraft carrier construction pictures that showed up in Av Week last year. Making a project secret doesn't exempt it from the laws of physics. (Too bad the SDI folks don't realize this. :-)) Phil
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Path: arc1-ca.pugleaf.net!utzoo!linus!philabs!prls!pyramid!oliveb!ames!umix!umich!mibte!gamma!pyuxp!pyuxww!sabre!faline!karn From: karn@faline.bellcore.com (Phil R. Karn) Newsgroups: sci.space,sci.crypt Subject: Re: satellites Summary: spysat nonsense Message-ID: <1699@faline.bellcore.com> Date: 11 Jan 88 23:08:46 GMT References: <873@uop.edu> <2166@umd5.umd.edu> <4910@well.UUCP> <1952@netsys.UUCP> Organization: Bell Communications Research, Inc Lines: 19