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How does Differential GPS works?   
So how does Differential GPS actually works? How can it relate to positioning?


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Sally
11/03/2008
05:32:43 PM
How does Differential GPS works?
Differential GPS is based on the interaction of two receivers – one that is stationary and the other one moving to make positional measurements. The most important point here is that it is the “stationary receiver” which is the main focal point in calculating measurements and comparing all the other measurements that are being beamed to it by the roving receivers.
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Steve
11/03/2008
05:33:51 PM
How does Differential GPS works?
So how does that enhance the accuracy of the positioning measurements?

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Aileen
11/03/2008
05:34:55 PM
How does Differential GPS works?
Keep in mind that GPS receivers, especially the stationary one, will at least have 4 timing signals received from 4 roving satellites to make an accurate establishment of a position. And since each of these 4 satellites will have some error of some sort in timing, the stationary receiver will act as a common reference point for the roving receivers, enabling it to correct the errors in the calculations and beam the correct calculation back to the roving receivers to enable them to correct theirs.
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