可重部署钠层测风测温激光雷达观测与研究

发布时间：2018-09-10 20:46

【摘要】：在中间层顶,钠原子是中高层大气波动的一种示踪物,通过钠原子的示踪作用可获得研究中间层顶和低热层大气的化学和动力学等相关信息。所以对钠层的探测和研究在空间科学和大气物理学中具有重要意义。钠层测温测风激光雷达可探测75-105Km大气的温度、风场和钠原子密度等环境参量,是目前临近空间环境探测的重要设备之一,具有高时间、空间分辨能力、高探测灵敏度、多参量同时探测等优点。本研究工作主要为可重部署钠层测风测温激光雷达的观测与研究,主要研究内容为首先简介了利用钠层测风测温激光雷达测量中间层顶区域大气温度和风场的基本原理以及钠层测风测温激光雷达的系统组成,其次主要研究了钠层测风测温激光系统的可重部署设计,最后重点利用钠层测风测温激光雷达的观测数据进行了国内外相关研究热点的分析与研究,包括钠层结构变化、大气重力波引起的偶发钠层和中间层顶逆温层等。首先,钠层测风测温激光雷达的基本测量原理为发射激光去激发金属原子产生荧光,通过分析接收到荧光的强度、多普勒展宽以及多普勒频移等信息,可以获得钠原子数密度、大气的温度以及风速等;该激光雷达系统主要包括发射系统、接收系统、数据采集与控制系统以及数据处理与分析系统等;最后介绍了钠层测风测温激光雷达与卫星数据以及流星雷达等探测设备的比较验证。其次,为了实现钠层测风测温激光雷达系统的可重新部署,我们将其安装于两台车载平台上,分别为发射车载平台和接收车载平台,其中发射车载平台包括激光雷达的发射系统、数据采集与控制系统以及数据处理与分析系统等;接收车载平台包括接收系统,主要安装了三台1米口径的望远镜及其后续光路接收系统。最后,本文主要利用了中国科学院临近空间环境野外综合观测站(廊坊,39oN,116oE)的钠层测风测温激光雷达和流星雷达等探测设备的探测数据对廊坊上空的钠层结构变化、大气重力波引起的偶发钠层和中间层顶逆温层等国内外相关热点现象进行了研究与分析。
[Abstract]:At the top of the middle layer, the sodium atom is a tracer for the fluctuation of the middle and upper atmosphere. Through the tracing action of the sodium atom, we can obtain the relevant information of studying the chemistry and dynamics of the top of the middle layer and the atmosphere of the lower thermosphere. Therefore, the detection and research of sodium layer is of great significance in space science and atmospheric physics. The sodium layer temperature measurement and wind lidar can detect the environmental parameters such as temperature, wind field and sodium atom density of 75-105Km atmosphere. It is one of the most important equipments in the near space environment detection at present. It has high time, space resolution and high detection sensitivity. The advantages of multi-parameter simultaneous detection. The main work of this study is to redeploy the sodium layer wind and temperature lidar observation and research. The main research contents are as follows: firstly, the basic principle of measuring atmospheric temperature and wind field in the middle layer by using sodium layer wind temperature lidar and the system composition of sodium layer wind temperature laser radar are introduced. Secondly, the redeploy design of sodium layer wind temperature laser system is mainly studied. Finally, using the observation data of sodium layer wind and temperature measurement laser radar, the relevant research hotspots at home and abroad are analyzed and studied, including the structure change of sodium layer. The occasional sodium layer and the top inversion layer caused by atmospheric gravity wave. First of all, the basic measurement principle of sodium layer wind temperature lidar is to emit laser to excite metal atoms to produce fluorescence. By analyzing the intensity of fluorescence, Doppler broadening and Doppler frequency shift, the number density of sodium atoms can be obtained. The laser radar system includes transmitting system, receiving system, data acquisition and control system, data processing and analysis system, etc. Finally, the comparison and verification between the sodium layer wind and temperature lidar, satellite data and meteor radar are introduced. Secondly, in order to realize the rearrangement of the sodium layer wind and temperature measuring lidar system, we installed it on two vehicle-mounted platforms, namely, the launching vehicle-mounted platform and the receiving vehicle-mounted platform. The launch vehicle platform includes a laser radar transmitting system, a data acquisition and control system, a data processing and analysis system, and a receiving vehicle platform includes a receiving system. Three 1-meter-caliber telescopes and their subsequent optical receiving systems are mainly installed. Finally, the paper mainly uses the detection data of the sodium layer wind and temperature lidar and meteor radar from the field comprehensive observation station of the Chinese Academy of Sciences (Langfang 39oNNU 116oE) to change the structure of sodium layer over Langfang. The related hot spots such as the occasional sodium layer and the top inversion layer of the middle layer caused by atmospheric gravity waves have been studied and analyzed at home and abroad.
【学位授予单位】：中国科学院国家空间科学中心
【学位级别】：博士
【学位授予年份】：2016
【分类号】：P412.25

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