Track ~80-120 intelligence-relevant satellites on the 3D globe using CelesTrak
TLE data and client-side SGP4 propagation (satellite.js). Satellites render at
actual orbital altitude with country-coded colors, 15-min orbit trails, and
ground footprint projections.
Architecture: Railway seeds TLEs every 2h → Redis → Vercel CDN (1h cache) →
browser does SGP4 math every 3s (zero server cost for real-time movement).
- New relay seed loop (ais-relay.cjs) fetching military + resource groups
- New edge handler (api/satellites.js) with 10min cache + negative cache
- Frontend service with circuit breaker and propagation lifecycle
- GlobeMap integration: markers, trails (pathsData), footprints, tooltips
- Layer registry as globe-only "Orbital Surveillance" with i18n (21 locales)
- Full documentation at docs/ORBITAL_SURVEILLANCE.md with roadmap
- Fix pre-existing SearchModal TS error (non-null assertion)
9772548d83