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From: VLSI%DEC-MARLBORO@sri-unix.UUCP
Newsgroups: net.space
Subject: How does Geostar work?
Message-ID: <565@sri-arpa.UUCP>
Date: Tue, 31-Jul-84 09:20:00 EDT
Article-I.D.: sri-arpa.565
Posted: Tue Jul 31 09:20:00 1984
Date-Received: Sat, 4-Aug-84 00:40:41 EDT
Lines: 13

From:  John Redford 

Can someone on the net tell us how the Geostar navigation system works?
The accuracies claimed for it are much higher than those for the military
Navstar system (less than 1 meter positioning accuracy versus 30 meters).
However, the Geostar ground units are simpler (they do not need an accurate
time base) and they use fewer satellites (four versus eighteen).  How can
they do so much better with so much less?  Technical answers only please,
not flames about the inferiority of anything done by the government.

John Redford
DEC-Hudson
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