Rayleigh Doppler Lidar for Higher Tropospheric and Stratospheric Wind Observation
TANG Lei1**, WANG Cong-Rong1, WU Hai-Bin1, DONG Ji-Hui2
1Department of Physics and Engineering, Hefei Normal University, Hefei 230031 2Key Laboratory of Atmospheric Composition and Optical Radiation, Chinese Academy of Sciences, Hefei 230031
Rayleigh Doppler Lidar for Higher Tropospheric and Stratospheric Wind Observation
TANG Lei1**, WANG Cong-Rong1, WU Hai-Bin1, DONG Ji-Hui2
1Department of Physics and Engineering, Hefei Normal University, Hefei 230031 2Key Laboratory of Atmospheric Composition and Optical Radiation, Chinese Academy of Sciences, Hefei 230031
摘要A mobile molecular Doppler wind lidar (DWL) based on the double-edge technique is described for wind measurement from 10 km to 40 km altitude. Two edge filters located in the wings of the thermally broadened molecular backscattered signal spectrum at 355 nm are employed as a frequency discriminator to determine the Doppler shift proportional to the wind velocity. The lidar operates at 355 nm with a 45 cm aperture telescope and a matching azimuth-over-elevation scanner that can provide full hemispherical pointing. Intercomparison experiments of the lidar wind profile measurement are performed with collocated pilot balloon. The results show that the standard deviation of wind speed and direction are less than 10 m/s and 30° in the 5–40 km altitude range, respectively. The small mean difference and normal distribution between DWL and pilot balloon data and the transient eddy of the west-wind jet observed demonstrate that the DWL consistently measures the wind with acceptable random errors.
Abstract：A mobile molecular Doppler wind lidar (DWL) based on the double-edge technique is described for wind measurement from 10 km to 40 km altitude. Two edge filters located in the wings of the thermally broadened molecular backscattered signal spectrum at 355 nm are employed as a frequency discriminator to determine the Doppler shift proportional to the wind velocity. The lidar operates at 355 nm with a 45 cm aperture telescope and a matching azimuth-over-elevation scanner that can provide full hemispherical pointing. Intercomparison experiments of the lidar wind profile measurement are performed with collocated pilot balloon. The results show that the standard deviation of wind speed and direction are less than 10 m/s and 30° in the 5–40 km altitude range, respectively. The small mean difference and normal distribution between DWL and pilot balloon data and the transient eddy of the west-wind jet observed demonstrate that the DWL consistently measures the wind with acceptable random errors.
[1] Xia H Y, Sun D S et al 2007 Appl. Opt. 46 7120
[2] Flesia C and Korb C L 1999 Appl. Opt. 38 432
[3] Korb C L, Gentry B M, Li S X and Flesia C 1998 Appl. Opt. 37 3097
[4] Mckay J A 1998 Appl. Opt. 37 6480
[5] Korb C L, Gentry B and Weng C 1992 Appl. Opt. 31 4202
[6] Flesia C, Korb C L and Hirt C 2000 Opt. Lett. 25 1466
[7] Gentry B M, Chen H and Li S X 2000 Opt. Lett. 25 1231
[8] Garnier A and Chanin M L 1992 Appl. Phys. B 55 35
2012, Vol. 29 
