Demonstrating how the horizon / what we see is directly linked to the observers altitude
The higher the altitude the further out we can see, the lower, the less
All the while, the horizon rises to the eye level of the observer.
A theodolite has 2 eyepieces at different altitudes, one slightly higher than the other — this creates a measured difference in the output image seen / the data available afterwards
360 degrees of the observer, this horizon remains flat, continues to rise up to the observer’s eye level FROM ALL ALTITUDES WE HAVE SEEN : Rocket, drone, plane, and high altitude balloon footage, reaching higher than 25+ miles 120,000FT
