Using Python code How do I determine the ground-track period of ... from uhoh:
and Great Circle Distances in Python from Chris Webb, I wrote a program to plot the distance of the ISS ground track to a given reference point on Earth during 4 days after November 17, 2020.
The minimum distance is 113.81 km, calculated every minute of 4 days. The ISS moves very ...
I found it in the meantime:
Using the length_of function to check an arcminute length, a meridian, the equator and pole diameter:
from skyfield.api import Topos, load
from skyfield.functions import length_of
ts = load.timescale(builtin=True)
t = ts.utc(2021, 1, 1)
b1 = Topos(0., 0., elevation_m=0.0)
b2 = Topos(1. / 60., 0., elevation_m=0.0)