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From: nickw@syma.sussex.ac.uk (Nick Watkins)
Newsgroups: sci.space.shuttle
Subject: Endeavour & GPS
Keywords: Space Shuttle, Endeavour, Navstar GPS
Message-ID: <4975@syma.sussex.ac.uk>
Date: 30 Apr 91 18:05:52 GMT
Organization: University of Sussex
Lines: 20


I noted in a recent item in the UK Daily Telegraph newspaper that
Endeavour carries a "navigation system used in the Gulf War". I take
this to be GPS. Am I correct in this ?

If so:

1) Why didn't previous shuttles carry it ?

2) Do other spacecraft use GPS ? Was it part of ASAT designs, for
example ?

3) Is it precise enough to locate spacecraft *relative to each other* to
order km. This would have been a real asset to ESA's cluster project,
I'd have thought, but apparently interspacecraft tracking is all ground based.


Nick

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