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    Re: Lunar Distances with Alex's SNO-T
    From: Bill B
    Date: 2006 Oct 31, 20:05 -0400

    > The "pressure" they give here is the altimeter setting in inches Hg
    > (currently 30.07) and hectopascals (1018). On the line below that is the
    > raw observaton from the airport. As I write this it says:
    >
    > KRAP 311852Z 01004KT 10SM CLR 01/M17 A3007 RMK AO2 SLP225 T00061172
    >
    > The "A3007" means altimeter setting 30.07 inches. The "SLP225" is sea
    > level pressure, i.e., barometer reduced to sea level.
    
    Paul
    
    Very interesting.  Can you tell us what the other abbreviations are?
    
    Also, in talking to the department head of Purdue's aviation program who
    happens to be a meteorologist as well, he stated that altimeter settings are
    given for 10 feet above true.  Is that to somewhat compensate for the
    distance from the altimeter in the cockpit to the ground (landing gear
    etc.)?
    
    In practice, how well does the altimeter in a small aircraft match up to
    reality once on the ground?
    
    Thanks
    
    Bill
    
    
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