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Article #7673Re: Space Telescope
From: Henry Spencer
Date: Fri, 17 Oct 1986 17:40
Date: Fri, 17 Oct 1986 17:40
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> There is an earth/moon flag available to the flight software on board,
> that indicates when the ST is within some small angle of these
> objects; the instruments can take action or not, depending on
> the situation.
>
> You can bet there's a sun flag, too.
Possibly not. My recollection is that the attitude-control system is
forbidden to point the ST at the Sun, and won't even point it near the
Sun unless specially ordered to. There is also a completely independent
system, which cannot be turned off, which closes the telescope's lid if
the line of sight starts to intersect the Sun.
--
Henry Spencer @ U of Toronto Zoology
{allegra,ihnp4,decvax,pyramid}!utzoo!henry
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Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: version B 2.10 5/3/83; site utzoo.UUCP Path: arc1-ca.pugleaf.net!utzoo!henry From: henry@utzoo.UUCP (Henry Spencer) Newsgroups: sci.space Subject: Re: Space Telescope Message-ID: <7240@utzoo.UUCP> Date: Fri, 17-Oct-86 13:40:31 EDT Article-I.D.: utzoo.7240 Posted: Fri Oct 17 13:40:31 1986 Date-Received: Fri, 17-Oct-86 13:40:31 EDT References: <1322@rayssdb.UUCP> <4270002@hpfcla.HP.COM>, <363@uwmacc.UUCP> Organization: U of Toronto Zoology Lines: 15