大气消光

以消光系数为中心的三个方案，介绍了目前已普遍采用的方法、应用532nm大气消光系数间接求取α（1λ，z）和α（2λ，z）。

Three methods with extinction coefficient as the center are presented . First , 532 nm atmospheric extinction coefficient was used to indirectly ( obtain ) α(λ _1 , z ) and α(λ _2 , z ), This method has been used generally by people .

首先，由能见度求出波长0.55μm的大气消光系数，在减去大气分子的消光系数后得到0.55μm气溶胶的消光系数，使用Mie散射理论求出气溶胶粒子的数密度；

Firstly , 0.55 μ m atmospheric extinction coefficient can be resolved by using visibility , when it subtracts the extinction coefficient of atmospheric molecule , 0.55 μ m aerosol extinction coefficient can be obtained , and the number density of aerosol can be calculated by using Mie theory .

Mie散射激光雷达实验系统设计与大气消光系数反演方法研究用散射体波随机反演研究长白山火山区介质非均匀性

A Study on Inhomogeneity of Crust Medium in Changbaishan Tianchi Volcano by Scattering Body Wave Inversion Method

并利用Monte-Carlo方法模拟计算了三种大气消光分布情况下采用该方法测量的积分能见度。

Moreover , Monte-Carlo method is used to simulate integral visibility measured by the above method on the three different conditions of atmospheric extinct distribution .

在利用激光雷达信号反演大气消光系数的算法中，比较成功的有Collis的斜率法及Klett的散射激光雷达数据的分析反演算法。

Among algorithms for Lidar signal inversion , Slope method and Klett 's analytical inversion algorithm are representative .

利用改进的Klett反演算法对所测雷达回波信号反演获得大气消光系数分布，进一步求出云层高度、厚度及光学厚度。

Based on the lidar data , the extinction coefficient was inverted by using Klett inversion method ( ameliorated ) . Then , the information of cloud height , cloud thickness and optical depth are gotten .

根据全年贡献率的统计，对大气消光系数（bext）的贡献率依次为硫酸盐、有机物、元素碳、硝酸盐。

According to the statistics of the atmospheric extinction coefficient ( bext ) in 2008 , the major chemical composition are respectively sulfate , organic matter , elemental carbon , nitrate in the contribution rate decreasing order .

几种激光探测大气消光系数方法的比较

Comparison among several methods for lidar probing of atmospheric extinction coefficient

杭州城市大气消光系数和能见度的影响因子研究

Study on influence factors of urban aerosol on visibility & extinction coefficient

多波长激光的大气消光系数相关性及实时反演计算研究

Correlativity of atmospheric extinction coefficient and real-time inversion computation for multi-wavelength laser

大气消光特性与机载激光雷达眼睛安全关系的研究

Relationship between atmosphere extinction feature and eye safety of airborne atmosphere detection lidar

高山地区太阳可见光辐射大气消光的观测研究

A measurement of atmospheric extinction of solar visible radiation on the mountain area

大气消光系数的透过率迭代法求解研究

Solution of atmosphere extinction coefficient by transmittance iteration method

北京市夏季大气消光系数的来源分析

The analysis of sources of ambient light extinction coefficient in summer time of Beijing city

内陆地区近地面大气消光系数统计特征及气象要素影响分析

Statistical Characteristic on Atmospheric Extinction Coefficient and Impact Analysis on Meteorological Elements of Surface Layer of Inland Area

该算法对于无云层天气条件，利用最小二乘法对回波信号直接进行全程拟合，获得大气消光系数的边界值；

In the algorithm , the boundary value of extinction is calculated by fitting Lidar return signal in cloudless weather .

在回波信号反演方法上，本研究工作有如下创新：第一，提出了一种估算大气消光系数边界值的新方法.有效的团队合作；

One is estimating extinction efficient boundary values with least square fitting for return signals of Lidar . efficient teamwork ;

利用目标的反射光、两种激光波段的大气消光系数和其它关键技术来提高激光雷达的探测距离。

It uses reflection of object , atmosphere extinction coefficient of two laser wavelengths and others key technology to improve the observational distance of laser radar .

本文讨论了在实际工作中用柯什密得能见度公式推算大气消光系数时可能发生的误差。

In this paper , the error in estimating the atmospheric extinction coefficient from the observed data of visibility in terms of Koschmieder visibility formula has been discussed .

将其装载在轮船、飞机等载体上对大气消光系数、能见度进行主动遥感探测具有十分重要的军事应用意义。

By loaded on ships , aircraft and other carriers , it can do initiative remote sensing detection of atmospheric extinction coefficient or visibility . This has important significance for military applications .

结果表明，本文所采用的方法对气溶胶含量较少时的大气消光系数反演较好，当天空出现低云或气溶胶浓度过高时，则会出现消光系数截断的现象。

Results show that the method used in the paper is able to retrieve extinction coefficient well . However , when there is low cloud or high aerosol concentration , the extinction coefficient truncation appears .

2μm固体激光器因其体积小、成本低、大气消光比低、人眼安全等优点，成为相干多普勒测风激光雷达的首选光源。

On account of the advantages including small size , low cost , low atmospheric extinction ratio , eye-safe , etc. , 2 μ m solid-state laser is thought to be the preferred laser source for coherent doppler lidar .

1980-2002年西安地区大气水平消光特性分析

Analysis of aerosol optical property of horizontal extinction in Xi'an during 1980-2002

大气气溶胶消光特性和折射率的测量

Characteristics measurement of extinction and refractive index of aerosol particles

实验结果表明，水平大气气溶胶消光系数与黑碳质量浓度、地面风速等近地气象因子均有较好的相关性；

The results indicate that : the correlations of black carbon mass concentration and near ground wind speed to aerosol extinction coefficient are good ;

文中综述了激光雷达的发展现状，以及激光雷达探测大气气溶胶消光特性的理论基础；

In the paper , a developing actuality on lidar and theory of extinction properties of atmospherical aerosol based on lidar detection are summarized .

给出了具体探测的实验结果，推算出系统的几何重叠因子，根据激光雷达方程的反演方法，得出了大气气溶胶消光系数随高度变化的垂直分布廓线图。

Based on the experimental results , the overlap factor of the system and retrieve the profile of the atmosphere aerosol extinction coefficient can be deduced .

实验结果表明，经过一定的对比和标定，该系统可直接用来测量、监测白天大气的消光系数或水平气象能见度。

The results show that this system can directly be used in monitoring and measuring daytime atmospheric extinction coefficient or horizontal visibility , as the system is calibrated correctly .

前向散射能见度仪测量前向散射光强度，确定大气的消光系数，进而获得大气的能见度值。

The intensity of forward-scattered light is measured by the forward-scattering visibility sensor , which determines the extinction coefficient of the air , then the visibility can be obtained .

该方法设计出来的大气气溶胶消光系数检测系统体积小、操作简单、探测速度快，对监测大气污染和能见度等有一定的应用价值。

The atmospheric aerosol detector developed by this method has many merits , such as small size , easy and quick to operate . So it has certain application value on monitoring air pollution and visibility .