Horizon Dip Measurements

The horizon dip measurement is the angle between the horizontal (the line perpendicular to the vertical at a specific point) and the apparent horizon.

On a globe, we would expect this angle to increase with increasing altitude, because the horizon would drop away with the curve.

On a flat earth, we would expect the horizon to always "rise to eye level".

Instructions

If you want to submit your own, email dip@mctoon.net Please include the following detail with your submission:

1. A clearly visible horizon (ideally, no clouds at, or near the horizon)

2. An instrumented graphic overlay showing true horizontal

3. The name of the device used to show the graphic overlay

3. Altitude at time of photo

4. Image Source/Credit. Please indicate if you want to be credited and how. We do not wish to dox anyone but we do want to appropriately give credit where it is due.

Gallery

Note:
Some photos are cropped due to the size limit for uploaded files.

[[File:= Gallery = Note: Some photos are cropped due to the size limit for uploaded files. Source/Credit McToon Altitude 1100 km Dip 3° Device Theodolite |x256px||center|thumb]]
Source/Credit	<source>
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Lens	unkonwn