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From: kort@hounx.UUCP (B.KORT)
Newsgroups: net.astro
Subject: Re: Launch Window.  What do they mean by this?
Message-ID: <563@hounx.UUCP>
Date: Mon, 3-Feb-86 13:05:33 EST
Article-I.D.: hounx.563
Posted: Mon Feb  3 13:05:33 1986
Date-Received: Wed, 5-Feb-86 00:53:24 EST
References: <2170@amd.UUCP>
Organization: AT&T Bell Labs, Holmdel NJ
Lines: 6

If the spacecraft itinerary includes any measurements in space
(e.g. shots of Halley's Comet), or any activity that requires a
certain sun angle, then the launch must take place within a narrow
time window.  Otherwise the activity would have to be rescheduled
(which may be impractical) or the activity would have to take place
with inadequate sun lighting conditions.  --Barry Kort