Devlog #9 — Pass predictionThe part I was most scared of. Also the coolest.computePasses()
steps through the next 6 days in 30-second jumps, calculates the ISS
position at each step, and converts it to look angles from your
location. Elevation above 10° = pass starts. Drops below = pass ends.The
visibility check is the fun part. You can only see the ISS with your
own eyes if three things line up: it’s above 10°, the sun is 6°+ below
your horizon , but the ISS up there is still catching
sunlight. Basically a sunlit object against a dark sky. That’s what
you’re actually seeing.Also finished the
geolocation button, the reverse geocoding for your city name, and the
pass table — time, duration, max elevation, compass direction. Visible
passes get an orange dot.Deepest I’ve been in over my head this whole project. But piece by piece, it makes sense now.