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Old 15th July 2008 | 15:01
  #7 (permalink)  
bsal
 
Joined: Feb 2008
Posts: 74
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From: Ireland
If A29.99 is set on the aircraft altimeter at the time of the observation then the altimeter will read the airport elevation not zero or any other number, so it is the pressure at the airport. And we all know SLP is sea level pressure.
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