Radar detection method for detecting presence of e.g. hovering helicopter, involves monitoring phase detecting duration equal to time separating two successive lightings produced by rotation of main rotator blade

摘要

The method involves monitoring a phase detecting a duration equal to a time separating two successive lightings produced by rotation of a main sustaining rotor blade, where the time is increased from a duration of a lighting. The detection phase involves emitting pulse bursts of detection of a same frequency inside a burst such that the time separating two consecutive pulses is lower that a duration of a lighting.