Direction Finding for Radio Transmitters With Mini Interferometric Network

In this paper, we present the design and deployment of a broadband interferometric mini array. The network with five electromagnetic signal detectors deployed over an area about 1 km2 is applied here to record 20- to 70-kHz vertical electric fields emitted by radio transmitters in very low frequency/low-frequency band. Furthermore, interferometric imaging algorithm is employed to evaluate the elev...