About Arrays Arrays are available in a range of sizes and antenna configurations for fixed or vehicle-based deployment with frequency range options from 20 MHz to 18 GHz. Twin receiver channels provide simultaneous monitoring, DF and geolocation capabilities. Class-leading signal interception The RFeye® Array is a fully integrated multi-mission system for continuous 24/7 spectrum monitoring and surveillance for detecting and locating unauthorized, suspicious or interfering transmitters. It is designed to intercept signals, however transient, perform signals analysis and classification and quickly and reliably geolocate target transmitters, all in real-time or recorded for future analysis. The RFeye Array uses a unique multi-layer approach that is more sophisticated and versatile than traditional direction finding. High performance spiral directional antenna modules are optimized for different frequency bands and arranged in multiple orientations. The Array is sensitive to the majority of incoming signal polarizations including all linear polarizations, allowing reliable detection of signals including those invisible to most DF systems that use only vertically polarized antennas. Augmented geolocation techniques - “beyond direction finding” The RFeye receiver commutates at very high speed around the antennas to make near-simultaneous measurements in multiple directions. It measures correlations and calculates actual positional probabilities using “augmented” Time Difference of Arrival (TDOA) and/or Power on Arrival (POA) techniques.In addition, it gives an Angle of Arrival (AOA) bearing based on received power at each antenna. Measurements from these different techniques can be overlaid onto a wide variety of maps, satellite images and 2D / 3D GIS datasets, to give a unique positional display showing source geolocation probabilities. All signal types can be mapped, irrespective of signal power, bandwidth or frequency. Modular and flexible deployments Each RFeye Array is fully self-contained within a robust IP65 rated radome designed for hostile conditions. Close coupling of the RFeye Node and antenna modules reduces cable runs and cable losses and significantly improves performance at higher frequencies. Various directional antenna options are available from 100 MHz to 18 GHz and a frequency extender module is available for AOA on VHF signals down to 20 MHz. Arrays can be networked over large distances as part of a wider monitoring and TDOA network with other RFeye receivers.