可重部署鈉層測風測溫激光雷達觀測與研究
發(fā)布時間：2018-09-10 20:46
【摘要】：在中間層頂,鈉原子是中高層大氣波動的一種示蹤物,通過鈉原子的示蹤作用可獲得研究中間層頂和低熱層大氣的化學和動力學等相關信息。所以對鈉層的探測和研究在空間科學和大氣物理學中具有重要意義。鈉層測溫測風激光雷達可探測75-105Km大氣的溫度、風場和鈉原子密度等環(huán)境參量,是目前臨近空間環(huán)境探測的重要設備之一,具有高時間、空間分辨能力、高探測靈敏度、多參量同時探測等優(yōu)點。本研究工作主要為可重部署鈉層測風測溫激光雷達的觀測與研究,主要研究內容為首先簡介了利用鈉層測風測溫激光雷達測量中間層頂區(qū)域大氣溫度和風場的基本原理以及鈉層測風測溫激光雷達的系統(tǒng)組成,其次主要研究了鈉層測風測溫激光系統(tǒng)的可重部署設計,最后重點利用鈉層測風測溫激光雷達的觀測數據進行了國內外相關研究熱點的分析與研究,包括鈉層結構變化、大氣重力波引起的偶發(fā)鈉層和中間層頂逆溫層等。首先,鈉層測風測溫激光雷達的基本測量原理為發(fā)射激光去激發(fā)金屬原子產生熒光,通過分析接收到熒光的強度、多普勒展寬以及多普勒頻移等信息,可以獲得鈉原子數密度、大氣的溫度以及風速等;該激光雷達系統(tǒng)主要包括發(fā)射系統(tǒng)、接收系統(tǒng)、數據采集與控制系統(tǒng)以及數據處理與分析系統(tǒng)等;最后介紹了鈉層測風測溫激光雷達與衛(wèi)星數據以及流星雷達等探測設備的比較驗證。其次,為了實現鈉層測風測溫激光雷達系統(tǒng)的可重新部署,我們將其安裝于兩臺車載平臺上,分別為發(fā)射車載平臺和接收車載平臺,其中發(fā)射車載平臺包括激光雷達的發(fā)射系統(tǒng)、數據采集與控制系統(tǒng)以及數據處理與分析系統(tǒng)等;接收車載平臺包括接收系統(tǒng),主要安裝了三臺1米口徑的望遠鏡及其后續(xù)光路接收系統(tǒng)。最后,本文主要利用了中國科學院臨近空間環(huán)境野外綜合觀測站(廊坊,39oN,116oE)的鈉層測風測溫激光雷達和流星雷達等探測設備的探測數據對廊坊上空的鈉層結構變化、大氣重力波引起的偶發(fā)鈉層和中間層頂逆溫層等國內外相關熱點現象進行了研究與分析。
[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.
【學位授予單位】：中國科學院國家空間科學中心
【學位級別】：博士
【學位授予年份】：2016
【分類號】：P412.25
本文編號：2235568
[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.
【學位授予單位】：中國科學院國家空間科學中心
【學位級別】：博士
【學位授予年份】：2016
【分類號】：P412.25
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