Article View: sci.space
Article #8602Re: GEOS-6 dies.
From: Frank Abernathy
Date: Fri, 10 Feb 1989 14:04
Date: Fri, 10 Feb 1989 14:04
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In article <5352@whuts.ATT.COM>, sw@whuts.ATT.COM (WARMINK) writes: > In article <1989Feb9.013228.965@utzoo.uucp>, henry@utzoo.uucp (Henry Spencer) writes: > > As I recall, it's part of a sensor that encodes the position of rotating > > parts in the satellite's scanner system. Those bulbs are a notorious > > reliability problem that is being designed out of more recent satellites; > > There must be a good reason why LEDs weren't used - 6 years plus isn't that > long ago...anybody know why not? > My understanding is they emit RF in the GHZ range. That's also why they aren't usually employed in ECM equipment. (But, as usual, I'm probably wrong. :^) )
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Path: arc1-ca.pugleaf.net!utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!wasatch!cs.utexas.edu!ut-emx!frank From: frank@ut-emx.UUCP (Frank Abernathy) Newsgroups: sci.space Subject: Re: GEOS-6 dies. Summary: ..they emit RF..? Message-ID: <10389@ut-emx.UUCP> Date: 10 Feb 89 14:04:42 GMT References: <AXrTkzy00UkZI0RUwa@andrew.cmu.edu> <14215@cup.portal.com> <5352@whuts.ATT.COM> Organization: The University of Texas at Austin, Austin, Texas Lines: 11