Wind profiling from high troposphere to low stratosphere using a scanning Rayleigh Doppler lidar

摘要

A scanning mobile Rayleigh Doppler lidar based on the molecular double-edge technique is developed for wind measurement from high troposphere to low stratosphere in 5-35km. To get higher optical efficiency and make the system more stable, a non-polarized beam splitter cube optically contacted to the FPI is used. This layout also provides a convenient method for null Doppler calibration. The laser frequency drift is measured by a wavelength meter and laser frequency locking is performed and an accuracy of +/- 0.5m/s are obtained in 10h. Horizontal wind velocity and direction retrieval is described for a detecting method of scanning in four directions. To validate the performance of the lidar, comparison experiments were carried out in in Jiuquan (39.741 degrees N, 98.495 degrees E), Gansu province, northwest of China, from 16th October to 12th November 2015, which showed good agreement with radiosonde.