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$Ken Gebhart: Re: Refraction at the horizon.$ $Marcel Tschudin: Re: Refraction at the horizon.$

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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$Ken Gebhart: Re: Refraction at the horizon.$ $Marcel Tschudin: Re: Refraction at the horizon.$

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