METHOD AND LIDAR SYSTEM FOR MEASURING THE TURBULENCE OF THE ATMOSPHERE CARRIED OUT ON BOARD OF AIRCRAFT AND ALSO IN AIRPORTS AND WIND POWER PLANTS

摘要

1. A method of measuring atmospheric turbulences using a lidar system, in particular, on board aircraft, in which an extended pulsed laser beam (12) with a given wavelength is sent in the direction of the region of space and receive backscattered light from the region of space of interest, different the fact that at the first time t1 and at the second time t2 after sending the laser pulse (L) measure the intensity distribution in the cross section of the backscattered flux with Veta and on the basis of a comparison of two intensity distributions determine the turbulence of the atmosphere in the measurement field determined by the time instants t1 and 12.! 2. The method according to claim 1, characterized in that by measuring the intensity distribution at the corresponding time point, speckles are detected that occur during backscattering of the laser pulse (L) on air molecules and aerosol particles, and atmospheric turbulence is determined based on a comparison of speckle patterns. ! 3. The method according to claim 1, characterized in that the intensity distributions at both time instants t1 and t2 are recorded using a camera (21, 22) at a given exposure time and based on the images obtained, a graphical representation of the variation of the refractive index in the measurement field is formed. ! 4. The method according to claim 1, characterized in that the cross-correlation of the intensity distributions is established to represent the variation of the refractive index in the measurement field in the form of an image. ! 5. The method according to claim 1, characterized in that periodically emit a lot of laser pulses (L) to perform many measurements with a certain