Jerry,
How are you timing Sunrise??? When the center is at the horizon, or when
the upper limb appears???
Also, height of eye, I would guess, is the easiest correction you are
dealing with.
John
WB1EHL
At 05:20 PM 3/15/03 -0600, you wrote:
There's another very significant uncertainty for most locations except
on the sea and that's the elevation angle to the horizon. Its rarely
exactly zero unless swimming with the centers of the eyeballs at the
surface of a calm sea. Everywhere else that elevation varies according
to the terrain and elevation of the observer with respect to the local
and distant terrain. Hills setting the horizon make for late sunrise and
early sunsets.
73, Jerry, K0CQ
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Entire content copyright Dr. Gerald N. Johnson, electrical engineer.
Reproduction by permission only.
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