Awesome. This is a side project I never got around to making myself. For all the questions of "How do you know where the satellites are", there are published TL

Awesome. This is a side project I never got around to making myself. For all the questions of "How do you know where the satellites are", there are published TLEs (old punchcard format) that describe orbital parameters, and you can use those to estimate the position within ~10km (good enough for this). https://celestrak.org/NORAD/elements/ https://celestrak.org/NORAD/elements/