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    Re: Longitude by Sunrise example
    From: Marcel Tschudin
    Date: 2010 Feb 5, 22:10 +0200

    Spring time is prone to ducting phenomena by inversions from warm air
    over the sea which is still cold from winter. I noticed that in these
    situations the sun is also much brighter than usual but I don't know
    the reason for this. Normally I notice those ducts from a longish
    blotch of light at the apparent horizon (in some cases being
    rectangular). This light blotch remains then for a while and delays
    the last glimpse. In some cases I realise only later, from looking at
    the photos, that there was some ducting involved.
    
    I'm interested to hear your experiences.
    
    Marcel
    
    
    
    

       
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