Numerical study of the possibilities of wind sounding in the atmospheric layer from 10 to 20 km by an airborne coherent Doppler lidar
I.N. Smalikho, V.A. Banakh
V.E. Zuev Institute of Atmospheric Optics of Siberian Branch of the Russian Academy of Science, Tomsk, Russia
Keywords: coherent Doppler lidar, molecular scattering, wind speed, numerical simulation, sounding, signal-to-noise ratio
Abstract
The possibilities of using molecular scattering to determine the wind speed from measurements by a pulsed coherent Doppler lidar (PCDL) from an aircraft at altitudes from 10 to 20 km are numerically studied. The simulation was carried out for probing radiation focused at 500 m at wavelengths of 1 mm and 2 mm, the aperture diameter of the receiving-transmitting telescope was set equal to 10 cm. It is shown that the threshold SNR in measurements from an aircraft is attained at a pulse energy much lower than when sounding from the Earth. Modern PCDLs with probing pulse energies of 1-4 mJ, after adding a molecular scattering recording channel, can be used for airborne wind measurements at altitudes of 10-20 km.
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