The effect of collisional line broadening on the accuracy of tropospheric temperature measurements using pure rotational Raman lidars
V.V. Gerasimov1,2
1V.E. Zuev Institute of Atmospheric Optics of Siberian Branch of the Russian Academy of Science, Tomsk, Russia
2National Research Tomsk State University, Tomsk, Russia
Keywords: комбинационное рассеяние, лидар, уширение спектральных линий, калибровочная функция, температура тропосферы, Raman scattering, lidar, spectral line broadening, calibration function, tropospheric temperature
Abstract
The effect of collisional line broadening on the accuracy of tropospheric (0-11 km) temperature retrievals from pure rotational Raman lidar raw signals is estimated via numerical simulation. The simulation was performed for three sets of spectral filters with different passbands in a lidar receiving system. A narrow-linewidth laser with a wavelength of 532 nm was considered as a lidar transmitter. A comparative analysis of temperature retrieval errors (calibration errors) produced by using nine calibration functions is presented. The calibration function retrieving tropospheric temperature with the least errors is determined for each set of filters.
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