CONNECTING…
Live: the station marker and its trail come from wheretheiss.at, polled every five seconds. The badge reads LIVE TRACKING only while fresh fixes arrive.
Math: the terminator comes from solar declination and subsolar longitude computed from the clock. The dashed ring and any estimated marker come from an inclined circular orbit, not TLE propagation, and are labeled ESTIMATED PATH wherever they show.
Limits: city lights are a static texture, not tonight's power grid. Clouds drift on a fixed breeze, not the weather. The feed can lag or fail; the page degrades to math with the badge to prove it. Full detail in docs/methods.md in the repository.
Made by Royal Pinto at Facetworks.