Every station listens 24/7 across 400 MHz – 6 GHz. Jetson matches RF signatures against a drone protocol library (OcuSync, FHSS, LoRa, LTE). Multiple stations compute bearings — TDOA multilateration gives 3D coordinates. Zero emissions. Invisible to adversary.
ALWAYS ON · $500/STN · SUB-100 M FIX100 ms WiFi impulse provokes probe request from the drone. MAC address captured — OUI prefix identifies manufacturer instantly (DJI, Autel, Skydio). Speed + altitude filter separates drones from vehicles and birds. Station returns to silence.
100 MS BURST · ESP32 $10 · VENDOR IDNearest radar-equipped station activates beam on target azimuth (slew-to-cue). Micro-Doppler detects blade rotation — definitive drone signature. 4D track (range, azimuth, elevation, velocity) handed to effector layer via ASTERIX / SAPIENT.
ON DEMAND · 40–80 W · MICRO-DOPPLER