What we track

Live state vectors — OpenSky /states/all bounded to the Nevada bounding box covering KLAS, KXTA, and KTNX, polled every 5 minutes.
Callsign filter — JANET* and JNH* callsigns. ICAO24 codes seen with Janet callsigns are added to a persistent fleet registry.
Per-flight telemetry — position, altitude, velocity, heading, squawk, on_ground state, observation timestamps.

Why watch it

Activity patterns reflect operational tempo at Area 51 / Groom Lake / Tonopah. Anomalies — unusual silence, new tail numbers, off-pattern destinations — are signal.