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Narrowband sodium lidar for the measurements of mesopause region temperature and wind

机译：窄带钠激光雷达用于测量更年期区域的温度和风

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We report here a narrowband high-spectral resolution sodium temperature/wind lidar recently developed at the University of Science and Technology of China (USTC) in Hefei, China (31.5 deg N, 117 deg E). Patterned after the Colorado State University (CSU) narrowband sodium lidar with a dye laser-based transmitter, the USTC sodium temperature/wind lidar was deployed with a number of technical improvements that facilitate automation and ease of operation; these include a home constructed pulsed dye amplifier (PDA), a beam-steering system, a star-tracking program, and an electronic timing control. With the averaged power of approx1.2 W output from PDA and the receiving telescope diameter of 0.76 m, our lidar system has a power aperture product of approx0.55 Wm~(2) and is comparable to the CSU and the University of Illinois at Urbana-Champaign (UIUC) sodium lidar systems. The uncertainties of typical measurements induced by photon noise and laser locking fluctuation for the temperature and wind with a 2 km vertical and 15 min temporal resolutions under the nighttime clear sky condition are estimated to be approx1.0 K and approx1.5 m/s, respectively, at the sodium peak (e.g., 91 km), and 8 K and 10 m/s, respectively, at both sodium layer edges (e.g., 81 km and 105 km). The USTC narrowband sodium lidar has been operated regularly during the night since November 2011. Using the initial data collected, we demonstrate the reliability and suitability of these high resolution and precision datasets for studying the wave perturbations in the mesopause region.
机译：我们在这里报告最近在中国合肥（31.5 deg，E 117 deg）的中国科学技术大学（USTC）开发的窄带高光谱分辨率钠温度/风激光雷达。以科罗拉多州立大学（CSU）窄带钠激光雷达为蓝本，并使用基于染料激光的发射器进行仿制，部署了USTC钠温度/风激光雷达，并进行了多项技术改进，以促进自动化和易于操作;其中包括家用脉冲染料放大器（PDA），光束转向系统，星跟踪程序和电子定时控制。借助PDA的平均输出功率约为1.2 W，接收望远镜的直径为0.76 m，我们的激光雷达系统的功率孔径乘积约为0.55 Wm〜（2），可与CSU和伊利诺伊大学相比。 Urbana-Champaign（UIUC）钠激光雷达系统。在夜间晴朗的天空条件下，在垂直分辨率为2 km且时间分辨率为15 min的温度和风中，由光子噪声和激光锁定波动引起的典型测量的不确定性估计为大约1.0 K和大约1.5 m / s，分别在钠峰（例如91 km）处以及在两个钠层边缘（例如81 km和105 km）处分别为8 K和10 m / s。自2011年11月以来，USTC窄带钠激光雷达已在夜间定期运行。使用收集到的初始数据，我们证明了这些高分辨率和精密数据集用于研究更年期地区波扰动的可靠性和适用性。

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