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"""Compute theoretical maximal visibility on earth with the assumption of the earth being a perfect sphere and the absence of refraction. | |
Some interesting links: | |
https://aty.sdsu.edu/explain/atmos_refr/horizon.html | |
https://sites.math.washington.edu/~conroy/m120-general/horizon.pdf | |
""" | |
import numpy as np | |
RADIAN_EARTH = 6371e3 # meters |