Patent ID: 6424408
Filing Date: 2002-07-23
Classification: G01P,G01S,Y02A

Abstract:
Wake turbulence detecting system comprising:first laser radar located close to a runway, said first laser radar including a laser transmitter-receiver unit emitting laser beam toward an aircraft taking off or landing on said runway and receiving reflected laser beam reflected back by aerosol floating in the atmosphere where said laser beam is irradiated and scattering said laser beam, and a scanning control part controlling the irradiating direction of the laser beam irradiated from said laser transmitter-receiver unit; second laser radar located at a position differing from that of said first laser radar, said second laser radar including a laser transmitter-receiver unit irradiating laser beam toward an aircraft taking off or landing on said runway and receiving reflected laser beam reflected back by aerosol floating in the atmosphere where said laser beam is irradiated and scattering said laser beam, and a scanning control part controlling the irradiating direction of the laser beam irradiated from said laser transmitter-receiver unit; and a signal processing device producing first wake turbulence information on the area irradiated by the first laser beam based on the reflection of the light emitted by the first laser radar including the magnitude, the wind velocity and the origin of the wake turbulence, and producing second wake turbulence information including the scale, the wind velocity and the birth place of the wake turbulence in the area where said second laser beam is irradiated based on reflection of light emitted by the second laser radar, and indicating the wake turbulence information of the area where the irradiation of said first and said second laser radar do not overlap each other by making a composite of said first and second wake turbulence information, and indicating the wake turbulence information of the area where the irradiation of said first and second laser radar overlap each other by comparing said first wake turbulence information with second wake turbulence information to select the one having a larger value.