Angle of Arrival (AOA)
Using a SKYPERION DR Sensor, the system can find the AOA direction to provide the operator with a line of bearing to the Signal of Interest (SOI). This is achieved by analysing the strength of signals received between directional antenna elements in the sensor array.
AOA measures the signal power and so its ability to generate the line of bearing is only limited by the noise floor of the receiver. SKYPERION is designed with circular polarised antenna to maximise the received signal strength from most transmitting signal polarisations, which includes linear polarisation irrespective of orientation. This technique overcomes any problems associated with polarisation loss, which is possible if a horizontally polarised signal suffers from alternative direction-finding systems.
Resolving AOA lines of bearing from multiple sensors provides the geolocation of the SOI. Identifying and tracking intersection points in multiple lines of bearing allows an understanding of the whereabouts and movements of a Signal of Interest. The line of bearing from a SKYPERION DF Sensor can be used to skew an EO/IR camera simultaneously in the same direction to provide a visual along the line of bearing at the target. The skewing of cameras can be programmed as an automatic or manual response to the identification of an SOI.