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Fay Pullen wielding her fancy...

 
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Fay Pullen wielding her fancy...
Fay Pullen wielding her fancy schmancy clinometer to measure the West Summit inclination from the Middle Summit. She and I both measured a 2-degree downward angle to the West Summit, which, at first blush, implies the Middle Summit is higher. However, Earth curvature effects need to be considered. For a one-mile separation, the drop away due to Earth curvature is 8 inches. At a one-mile separation between peaks, 2 degrees equates to 185 feet of vertical distance (trigonometry), so obviously the curvature effect has no significance. At these distances, atmospheric distortion is probably negligible too. So I guess one could conclude that the Middle Summit is the highpoint of the Goat massif. April 18, 2005.

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ericnoelCurvature of Earth

ericnoel

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Hmmm, I googled for curvature of the Earth over one mile and multiple sites were you unanimous in citing 8 inches. Something is clearly amiss here with one calculation or another to get such disparate figures where you have it 184 feet higher. ?
Posted Nov 9, 2008 11:56 pm

KlenkeRe: Curvature of Earth

Klenke

Hasn't voted

I fixed the caption. Thanks. The 185-ft value was not the drop away value due to curvature but the vertical drop away for 2 degrees down and one mile distance (tangent stuff).
Posted Nov 10, 2008 2:25 pm

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KlenkeSubmitted by Klenke
on Apr 22, 2005 7:07 pm

Image ID: 101812
Hits: 2673 
Lat/Lon: 46.36390°N / 122.1023°W
Object Title: Fay Pullen wielding her fancy...