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On Fri, 07 Dec 2007 06:26:17 -0700, Isonomia  wrote:

> The problem is, that like most people, I've never set out to look for
> the sun at that moment it hits the horizon, and although I've seen the
> sun around sunrise/set, I've no idea how this chance observation
> relates to seeing the sun as it hits/leaves the horizon.

About fifty years ago I had a summer job at an agricultural research
station.  One apparatus was basically a crystal ball on a stand, "burning"
a path for the day on a tilted half cylinder of paper.  I think the paper
automatically notched upward each night . . . but it has been quite a long
time ago for all the details.  Cloudy sky didn't make a good mark, but
bright sun was clearly evident.  Seemed like a simple way to get the
number of sunshine hours at a given location.

Would that help?

--
Richard . . .

Using Opera 9.2.4 after the "Dog" died

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