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GPS Altitude - Issues and Tests
Posté le 11 juin 2004 à 18:42:39 par gpspassion.

1. What's Wrong With the Altitude...

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...a question that often comes up in the forums! While this (Z) dimension is less accurate than the other two (X and Y) due to the way GPS works (satellites are in orbit at 20,000kms), there's another problem that comes into play, the WGS84 ellipsoid!

Forum member rwcx183 walks us through the way GPS altitude is calculated and how the "real" altitude can be derived. It's quite technical, but it might take out some of the frustration towards your GPS receiver ;-)

This way to his article.

  2. Putting GPS Altitude to the Test >>

 
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