ARGUS is a distributed passive radio-intelligence system. It geolocates emitters via AoA + TDOA — with azimuth derived through phase-based direction finding — across 300 MHz – 6 GHz. It operates in complex RF environments and detects FHSS and wideband OFDM emitters. UAV detection range: up to 60 km. Location accuracy for airborne sources from 2 meters, enough to resolve their trajectory precisely.