›› 2015, Vol. 24 ›› Issue (2): 24218-024218.doi: 10.1088/1674-1056/24/2/024218
• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇 下一篇
赵若灿a, 夏海云a b, 窦贤康a b, 孙东松a b, 韩於利a, 上官明佳a, 郭洁a, 舒志峰a b
Zhao Ruo-Can (赵若灿)a, Xia Hai-Yun (夏海云)a b, Dou Xian-Kang (窦贤康)a b, Sun Dong-Song (孙东松)a b, Han Yu-Li (韩於利)a, Shangguan Ming-Jia (上官明佳)a, Guo Jie (郭洁)a, Shu Zhi-Feng (舒志峰)a b
摘要: A mobile Rayleigh Doppler lidar based on double-edge technique is implemented for simultaneously observing wind and temperature at heights of 15 km-60 km away from ground. Before the inversion of the Doppler shift due to wind, the Rayleigh response function should be calculated, which is a convolution of the laser spectrum, Rayleigh backscattering function, and the transmission function of the Fabry-Perot interferometer used as the frequency discriminator in the lidar. An analysis of the influence of the temperature on the accuracy of the line-of-sight winds shows that real-time temperature profiles are needed because the bandwidth of the Rayleigh backscattering function is temperature-dependent. An integration method is employed in the inversion of the temperature, where the convergence of this method and the high signal-to-noise ratio below 60 km ensure the accuracy and precision of the temperature profiles inverted. Then, real-time and on-site temperature profiles are applied to correct the wind instead of using temperature profiles from a numerical prediction system or atmosphere model. The corrected wind profiles show satisfactory agreement with the wind profiles acquired from radiosondes, proving the reliability of the method.
中图分类号: (Remote sensing; LIDAR and adaptive systems)