Pelican is an airborne passive radio-intelligence system. Carried by a tactical UAV, it geolocates emitters through synthetic-aperture processing: the platform’s motion forms a virtual antenna array that yields target azimuth without a distributed sensor network. Operating across 300 MHz – 6 GHz, it works in complex RF environments and detects FHSS and wideband OFDM emitters. The elevated vantage extends line-of-sight and covers areas ground sensors cannot reach.