Development of 60 km mobile Rayleigh wind lidar

Recently, the wind field in the altitude range 25-60 km is still poorly monitored in real time, therefore the 60 km mobile Rayleigh wind lidar based on a Fabry-Perot etalon was developed for wind measurement. The overall structure of this lidar system was described in detail. The design of the subsystems of this lidar was indroduced elaborately. In order to improve the accuracy of wind measurement, experiment was designed to calibrate the transmission curves of FPI, and the calibration method was presented. The transmission curves of FPI were calibrated experimentally, and the standard deviations for parameters of FPI are less than 0.06 in the calibrated experiments. The developed lidar has observed the wind of 15-60 km altitudes over Delingha, and wind velocity and direction profiles were obtained. Observations of lidar were compared with the rawinsondes', and the compared result show good agreement between both measurements. Measure error was calculated, wind velocity and direction errors of the measurements are less than 4 m/s and 6 respectively when it is lower than 40 km. They are less than 8 m/s and 18 when it is higher than 40 km. Wind observations demonstrate that the lidar has the expected good performances.