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4篇 您的检索式:作者名="Cha Hyunki"
    题名 作者 年代 出处 被引量
1Design and performance simulation of a molecular Doppler wind lidar显示文摘A mobile molecular Doppler wind lidar at an eye-safe wavelength of 355 nm based on double-edge technique is being built in Hefei (China) for wind measurement from 10-to 40-km altitude. The structure of this lidar system is described. A triple Fabry-Perot etalon is employed as a frequency discriminator whose parameters are optimized. The receiver system is designed to achieve compactness and stability by putting in a standard 19-inch socket bench. Simulation results show that within the wind speed dynamic range of ±100 m/s, the horizontal wind errors due to noise are less than 1 m/s below 20-km altitude for 100-m vertical resolution, and less than 5.5 m/s from 20 km up to 40 km for 500-m vertical resolution with 400-mJ laser energy, 30-min temporal resolution, and a 45-cm aperture telescope.沈法华 Hyunki Cha 董吉辉 Dukhyeon Kim 孙东松 Sung Ok Kwon 2009Chinese Optics Letters2009,7,7:17
2Mobile Rayleigh Doppler wind lidar based on double-edge technique显示文摘We describe a mobile molecular Doppler wind lidar(DWL) based on double-edge technique for wind measurement of altitudes ranging from 10 to 40 km.A triple Fabry-Perot etalon is 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 provides full hemispherical pointing.To guarantee wind accuracy,a single servo loop is used to monitor the outgoing laser frequency to remove inaccuracies due to the frequency drift of the laser or the etalon.The standard deviation of the outgoing laser frequency drift is 6.18 MHz and the corresponding velocity error is 1.11 m/s.The wind profiles measured by the DWL are in good agreement with the results of the wind profile radar(WPR).Evaluation is achieved by comparing at altitudes from 2 to 8 km.The relative error of horizontal wind speed is from 0.8 to 1.8 m/s in the compared ranges.The wind accuracy is less than 6 m/s at 40 km and 3 m/s at 10 km.唐磊 舒志峰 董吉辉 王国成 汪永涛 徐文静 胡冬冬 陈廷娣 窦贤康 孙东松 Hyunki Cha 2010Chinese Optics Letters2010,8,8:6
3Analysis of Detectors and Transmission Curve Correction of Mobile Rayleigh Doppler Wind Lidar显示文摘一架活动分子的 Doppler 风激光雷达(DWL ) 从 10km 在高度为风测量基于双边技术被介绍给 40km。三倍的 Fabry-Perot etalon 作为一个频率辨别者被采用决定与风速度成正比的 Doppler 移动。激光雷达用一个 45 厘米的孔望远镜和能提供完整的半球的指的一台匹配的 azimuth-over-elevation 扫描仪在 355 nm 操作。以便保证风精确性,在不同计数率反应范围的察觉者的刻度功能的不同形式将是特别珍贵的。因为线性的刻度函数的申请,风速度重复的精确性从 10km 特别在高度在极端低轻紧张极大地被改进到 40km。非线性的刻度功能分别地以大约 1 M 计数率使边隧道 1 和边隧道 2 增加的传播成为 38.9% 和 27.7% 。因为察觉者的反应功能的考虑,风域测量的动态范围可以也在他们的全可能的操作范围被扩大。唐磊 汪永涛 舒志峰 董吉辉 王国成 徐文静 胡冬冬 陈廷娣 窦贤康 孙东松 CHA Hyunki 2010Chinese Physics Letters2010,27,11:2
4Low tropospheric wind measurement with Mie Doppler lidar 显示文摘Shen Fahua Cha Hyunki Sun Dongsong 2008Optical Review2008,15,4:1
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