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How many SATs in order to get position fix.

 
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gokhart
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Joined: Jun 17, 2004
Posts: 112
Location: London

PostPosted: Thu Jul 15, 2004 1:09 pm    Post subject: How many SATs in order to get position fix. Reply with quote

Hi,

this is my first post in the advanced forum, but I figured you guys might be able to explain or point me in the right direction. Why do you require 4 SATs in order to get a fix on your position rather than just 3? which is what I would have thought. Where can I learn more about this.

thanks.
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drummer
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Joined: Apr 08, 2004
Posts: 256
Location: Hampton, Middlesex, UK

PostPosted: Thu Jul 15, 2004 1:33 pm    Post subject: Reply with quote

I am not an expert, but found the following link very useful.

http://www.trimble.com/gps/
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nej
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Joined: Jun 16, 2004
Posts: 454
Location: London, Ingerlund

PostPosted: Thu Jul 15, 2004 3:29 pm    Post subject: Reply with quote

3 is enough to get you a 2D fix, 4 is enough to get you a 3D fix and should be considered the minimum for an accurate fix. Obviously the more you get the better.
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gokhart
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Joined: Jun 17, 2004
Posts: 112
Location: London

PostPosted: Thu Jul 15, 2004 7:52 pm    Post subject: Reply with quote

thanks for the info and the link. I am going through the presentation just now and it seems quite good.
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