Abstract: A radar system and method for determining location of targets, wherein the energy reflected from an object is received by the omnidirectional antenna elements and the received RF signal is downconverted to an intermediate frequency (IF) signal. The IF signals are digitized. The digitized IF signals received at the first omnidirectional antenna are digitally processed so as to form modal beams with opposite phase slope as output signals. The digitized IF signal received at the second omnidirectional antenna is digitally processed as to form a reference signal of phase reference. Phase differences between the signals and the reference signals are determined, such that each phase difference includes a first component proportional to the azimuth of the arriving signal and a second component corresponding to the elevation of the arriving signal, from which the azimuth and the elevation of the arriving signal can be extracted.

Abstract: An unmanned aerial vehicles (UAVs) aerial traffic monitoring system is provided and includes one or more UAVs comprising a transponder and at least one of a transmitter, a localization module and/or a communication module, radar systems covering and locating objects from 0° to 360° in azimuth and within a range of from ?45° to 45° in elevations below and above the horizon, a cloud software stored in a non-transitory memory and configured to be executed by a processor, that stores records of operating UAVs so as to allow online and real time situational awareness of UAV aerial traffic, aerial traffic load, and aerial collision predictions.