ATS Orbit Watch tracks satellites live, entirely in the browser. Published CelesTrak orbital elements are propagated with SGP4, the standard orbit model, and every position updates on a two-second tick. Five groups are a click apart: space stations, the brightest objects, GPS, weather satellites and geostationary craft. Select any satellite, the International Space Station included, and it gains a ground track running roughly fifty minutes either side of now, a visibility footprint sized from its current altitude, and an optional follow mode that keeps the camera on it as it moves. Element sets are cached, so the map keeps working if the feed is briefly unreachable.