Lidar using the backscatter amplification effect

Experimental data proving the possibility of lidar measurement of the refractive turbulence strength based on the effect of backscatter amplification (BSA) are reported. It is shown that the values of the amplification factor correlate with the variance of random jitter of optical image of an incoherent light source depending on the value of the structure constant of the air refractive index turbulent fluctuations averaged over the probing path. This paper presents the results of measurements of the BSA factor in comparison with the simultaneous measurements of the BSA peak, which is very narrow and only occurs on the laser beam axis. It is constructed the range-time images of the derivative of the amplification factor gives a comprehensive picture of the location of turbulent zones and their temporal dynamics

Turbulent UV-Lidar and Field Experiment in Airport

Built the special UV (355 nm) eye safe lidar for remote detection of the atmospheric turbulence. Lidar works on the backscatter enhancement effect. Testing of lidar was carried out on the airfield at the airport Tolmachevo (Novosibirsk) in July, 2018. Sounding path was crossing the place of take-off and landing. Lidar surely fixed the position, size and intensity of turbulent zones

Preliminary Lidar Experiment to Study the Backscatter Amplification

Long-term continuous measurements for detection relative backscatter amplification on a horizontal path of 2 km long are performed by using a specific micro pulse lidar. The laser beam path is limited by a solid obstacle. The lidar is located next to an ultrasonic anemometer that measures 3D wind velocity and temperature; the laser spot on the obstacle is observed by using a telephoto lens. The results showed that the backscatter amplification has a clear diurnal variation. Moreover, the backscatter amplification was completely absent in the morning and evening under neutral stratification in the atmospheric surface layer. At night and in the daytime there was a significant increase of the backscatter amplification coefficient

Lidar using the backscatter amplification effect

Experimental data proving the possibility of lidar measurement of the refractive turbulence strength based on the effect of backscatter amplification (BSA) are reported. It is shown that the values of the amplification factor correlate with the variance of random jitter of optical image of an incoherent light source depending on the value of the structure constant of the air refractive index turbulent fluctuations averaged over the probing path. This paper presents the results of measurements of the BSA factor in comparison with the simultaneous measurements of the BSA peak, which is very narrow and only occurs on the laser beam axis. It is constructed the range-time images of the derivative of the amplification factor gives a comprehensive picture of the location of turbulent zones and their temporal dynamics

Turbulent UV-Lidar and Field Experiment in Airport

Built the special UV (355 nm) eye safe lidar for remote detection of the atmospheric turbulence. Lidar works on the backscatter enhancement effect. Testing of lidar was carried out on the airfield at the airport Tolmachevo (Novosibirsk) in July, 2018. Sounding path was crossing the place of take-off and landing. Lidar surely fixed the position, size and intensity of turbulent zones

Aerosol Lidar for the Relative Backscatter Amplification Measurements

Backscatter amplification presents only in a turbulent atmosphere, when the laser beam is propagates twice through the same inhomogeneities. We proposed technical solution to detect backscatter amplification. An aerosol micro pulse lidar with a beam expansion via receiving telescope was built to study this effect. Our system allows simultaneous detection of two returns from the same scattering volume: exactly on the axis of the laser beam and off the axis