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.
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