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    Re: stange results from AM and PM sun shots
    From: Bill B
    Date: 2012 Sep 27, 22:33 -0400

    On 9/27/2012 7:54 PM, bill wrote:
    
    > 3. Due to refraction, we are seeing a limb that is not there in a
    > vacuum. The refraction correction would be -0d 33!8 for the center of
    > the sun or upper limb on the horizon. Therefore it is quite possible to
    > have an Hc north of 90d or 270d near the autumnal equinox.  If memory
    > serves there is about an 8 day lag past the equinox before light and
    > dark are equal.
    
    
    Correction
    
    "..an Hc north of 90d or..." should read, "...an azimuth north of 90d or..."
    
    Bill B
    
    
    
    

       
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