/sci/ - Science & Math

>>10291950
You don t need or use observer height for an x axis observation.

https://youtu.be/OQgXED2enu0
Earth’s curvature can't be visually seen from any location on the ground, even from Mount Everest. Studies show that the threshold altitude for seeing the curvature is about 35,000 ft (10,668 m). Even then, it's barely discernible and the observer must have a wide angle field of view. Only aircraft flying much higher (commercial jets sometimes climb above 40,000 ft or 12,192m) offer an easy view of the curvature.
https://epod.usra.edu/blog/2014/11/photographing-the-curvature-of-the-earth-trickier-than-you-think.html

27 km = 88582.7 feet

>>9484341