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Old 2nd Feb 2008, 09:15
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Sgnr de L'Atlantique
 
Join Date: Apr 2006
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SAT and TAT probes are designed to operate when the aiplane is moving through air.

So when sitting still on the ground, they are not accurate and are usually off by 2-4 degrees celsius.

So on the ground, the only temp you SHOULD rely on is what is given to you on the ATIS or by the tower...

Its as simple as that!
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