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Old 2nd February 2008 | 09:15
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Sgnr de L'Atlantique
 
Joined: Apr 2006
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From: Behind the Silver clouds
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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