| 激光测云雷达信号分析 |
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| 引用本文： | 陈臻懿,刘文清,张玉钧,何俊峰,阮俊,张春光.激光测云雷达信号分析[J].大气与环境光学学报,2009,4(1):75-81. |
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| 作者姓名： | 陈臻懿 刘文清 张玉钧 何俊峰 阮俊 张春光 |
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| 作者单位： | 中国科学院安徽光学精密机械研究所,中国科学院环境光学与技术重点实验室,安徽,合肥,230031 |
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| 基金项目： | 中国气象局科研专项基金 |
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| 摘 要： | 分析了用于测云的最佳激光雷达波段,给出了计算雷达方程所需的大气分子和气溶胶消光系数的垂直廓线模拟图,以及在小孔光阑存在的情况下同轴透射式测云激光雷达的几何重叠因子模拟图,使用拟定的大气探测激光雷达技术参数进行回波信号及其信噪比的模拟计算,分析脉冲发射能量、脉冲发射次数、滤光片半宽等对信噪比不同程度的影响.这对分析测云激光雷达的探测性能具有基本的意义,同时也为测云激光雷达技术参数的确定提供了理论上的分析依据.
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| 关 键 词： | 测云激光雷达 雷达方程 几何重叠因子 信噪比 |
| 收稿时间： | 2008/9/18 |
Analysis of Backscattering Signal for a Ceilometer |
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| CHEN Zhen-yi,LIU Wen-qing,ZHANG Yu-jun,HE Jun-feng,RUAN Jun,ZHANG Chun-guang.Analysis of Backscattering Signal for a Ceilometer[J].Journal of Atmospheric and Environmental Optics,2009,4(1):75-81. |
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| Authors: | CHEN Zhen-yi LIU Wen-qing ZHANG Yu-jun HE Jun-feng RUAN Jun ZHANG Chun-guang |
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| Affiliation: | CHEN Zhen-yi,LIU Wen-qing,ZHANG Yu-jun,HE Jun-feng,RUAN Jun,ZHANG Chun-guang (Key Laboratory of Environmental Optics and Technology,Anhui Institute of Optics and Fine Mechanics,Chinese Academy of Sciences,Hefei 230031,China) |
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| Abstract: | The optimal wavelength detecting the height of cloud is analyzed.Profiles of molecule extinction coefficient and aerosol extinction coefficient,which is necessary for signal estimation,are presented.Calculation for the geometric overlap factor with the existing slit diaphragm in a co-axial lidar is also given.Based on the specific features and lidar equation,simulations of the backscattering power and impact on the signal to noise ratio are discussed when the emitting power,emitting pulse numbers and width ... |
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| Keywords: | ceilometer lidar equation geometric overlap factor signal to noise ratio |
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