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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 ...


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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) print(round(...


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