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    Re: Refraction at the horizon.
    From: Bill B
    Date: 2008 Mar 18, 02:25 -0500

    Ken
    
    Quit teasing.  It is time for that book chapter you always meant to write.
    ;-)
    
    Bill
    
    > From: Ken Gebhart 
    >
    > At the risk of bringing up "sun squash" again (new members can search
    > the archives under this thread), I can state that data from 200
    > photographs taken at sunset/ sunrise shows a 5% squash at 3 deg
    > observed elevation at SL on Std day.  Sun disk images were projected
    > on a wall and measured with a yardstick.  Maximum squash ever seen
    > was 17%.  Distortion (squash) is more easily noticed with head at 90
    > deg to the horizon than erect.  Don't ask me why.
    
    
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