Given any TLE, produce ground track + coverage + country-overflight table.
The brief
Build a Python tool that, given any TLE as input, outputs (1) the 24-hour ground track as a GeoJSON LineString with timestamped vertices, (2) a coverage polygon assuming a 1000-km swath sensor, (3) a country-overflight table listing each country overflown with total dwell time in seconds. The country mapping must use the Natural Earth admin-0 boundary dataset (provided). Visualize the ground track on a Folium map, color-coded by altitude.
Rubric
Tool runs from CLI: `python coverage_tool.py --tle path/to/tle.txt`
Ground track GeoJSON is correctly geodesic (no straight-line shortcuts across the pole)
Country dwell table is consistent with the ground track (per-country dwell ≤ total propagation time)
Coverage polygon area is consistent with 1000-km swath × ground-track length
Folium HTML map renders correctly with altitude-colored ground track
Deliverable
Python project (CLI + library) + sample outputs for ISS, Hubble, and a Starlink satellite
Successful completion of this capstone (all rubric items met) mints the Certified Orbital Analyst certificate at /academy/verify/{certId}/.
Submission. Certificate issuance is gated to LaunchDetect Gold ($9.99/month). Submit your capstone deliverable via the form at /academy/verify/ (coming soon — backend in v2). For now, build it, push to GitHub, and link it on your portfolio.