雾霾天气红外辐射传输特性研究
发布时间：2019-05-28 06:37
【摘要】：随着激光应用于测距、制导、雷达等专业技术的快速发展,以及人们对深空探测技术和卫星遥感更加深入的研究,军事上已开始大面积应用大气辐射传输技术。长久以来辐射的传输过程在电子、传输、探测、定位、天体学等众多领域都得到了十分的重视,近半个世纪内取得了飞速的发展。近年来,由于地球上各种污染的逐步恶化,影响着大气中的各种气体分布。而其中各种分子的密度及含量对于大气分子吸收辐射能量的衰减程度有着最直接的影响。随着工业技术的迅猛发展,汽车尾气废弃物排放的增多,城市雾霾频频发生,浓度愈演愈烈,雾霾天气已引起人们的高度重视。虽然现在有很多对雾霾颗粒物浓度的测量仪器,但由于雾霾天气发生的随机性,轻重程度的不确定性,颗粒物分布的不稳定性,及现有资料的严重缺乏,导致我们用仪器只能测得某一次雾霾天气或者说某一地区雾霾天气的颗粒物分布情况,因此,本文提出了一种更具普遍性的雾霾天气红外辐射传输特性的研究体系。借助于气象数据及已测得的雾霾天气颗粒物浓度等进行分析,搭建更具有普遍性的粒子谱分布模型,进一步结合米氏理论计算雾霾天气颗粒物的吸收、散射及衰减特性,最终计算其热辐射。气体分子的透过率部分,为了得到更真实可靠的效果,在不考虑散射影响因素的前提下,利用MODTRAN对其透过特性进行计算。本文首先在介绍大气辐射传输特性发展现状以及其巨大应用意义的基础上,分析了雾霾天气下红外辐射特性研究的重要性；然后阐述了雾霾的红外辐射基本理论以及红外辐射计算中常用的辐射量,分析了雾霾天气大气辐射传输衰减产生的原因；分析了大气结构与相关参数,根据实际情况分析了雾霾条件下颗粒物复折射率数据库,对温度、高度进行合理的选择,结合米氏散射理论重点计算了雾霾天气颗粒物的散射、衰减及吸收因子,计算出颗粒物的散射、衰减和吸收系数,最终进行雾霾天气下3～5μm红外波段红外辐射特性的计算。本方法更具有普遍性,对雾霾天气目标识别等更具有广泛的应用价值。
[Abstract]:With the rapid development of laser in ranging, guidance, radar and other professional technologies, as well as more in-depth research on deep space detection technology and satellite remote sensing, atmospheric radiation transmission technology has been applied in a large area militarily. For a long time, the transmission process of radiation has been paid great attention to in many fields, such as electrons, transmission, detection, positioning, celestial science and so on, and has made rapid development in the past half century. In recent years, due to the gradual deterioration of all kinds of pollution on the earth, the distribution of all kinds of gases in the atmosphere has been affected. The density and content of various molecules have the most direct influence on the attenuation of radiative energy absorbed by atmospheric molecules. With the rapid development of industrial technology and the increase of automobile exhaust waste emissions, urban haze occurs frequently and the concentration is becoming more and more intense. Haze weather has attracted great attention. Although there are many instruments for measuring the concentration of haze particles, due to the randomness of haze weather, the uncertainty of severity, the instability of particle distribution and the serious lack of available data, As a result, we can only measure the distribution of particles in a certain haze weather or haze weather in a certain area by using the instrument. Therefore, a more universal research system for infrared radiation transmission characteristics of haze weather is proposed in this paper. With the help of meteorological data and the measured concentration of haze weather particles, a more universal particle spectrum distribution model is built, and the absorption, scattering and attenuation characteristics of haze weather particles are calculated according to Michele theory. Finally, the thermal radiation is calculated. In order to obtain more real and reliable effect, the transmittance of gas molecules is calculated by MODTRAN without considering the influence factors of scattering. In this paper, based on the introduction of the development status of atmospheric radiation transmission characteristics and its great application significance, the importance of studying infrared radiation characteristics in haze weather is analyzed. Then the basic theory of infrared radiation of haze and the radiation amount commonly used in infrared radiation calculation are described, and the causes of atmospheric radiation transmission attenuation in haze weather are analyzed. The atmospheric structure and related parameters are analyzed, the complex refractive index database of particles under haze condition is analyzed, the temperature and height are selected reasonably, and the scattering of haze weather particles is calculated according to the theory of Michele scattering. The scattering, attenuation and absorption coefficients of particles are calculated by attenuation and absorption factors, and finally the infrared radiation characteristics of 3 ~ 5 渭 m infrared band in haze weather are calculated. This method is more universal and has more extensive application value for haze weather target recognition.
【学位授予单位】：西安电子科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：X513;X87
本文编号：2486822
[Abstract]:With the rapid development of laser in ranging, guidance, radar and other professional technologies, as well as more in-depth research on deep space detection technology and satellite remote sensing, atmospheric radiation transmission technology has been applied in a large area militarily. For a long time, the transmission process of radiation has been paid great attention to in many fields, such as electrons, transmission, detection, positioning, celestial science and so on, and has made rapid development in the past half century. In recent years, due to the gradual deterioration of all kinds of pollution on the earth, the distribution of all kinds of gases in the atmosphere has been affected. The density and content of various molecules have the most direct influence on the attenuation of radiative energy absorbed by atmospheric molecules. With the rapid development of industrial technology and the increase of automobile exhaust waste emissions, urban haze occurs frequently and the concentration is becoming more and more intense. Haze weather has attracted great attention. Although there are many instruments for measuring the concentration of haze particles, due to the randomness of haze weather, the uncertainty of severity, the instability of particle distribution and the serious lack of available data, As a result, we can only measure the distribution of particles in a certain haze weather or haze weather in a certain area by using the instrument. Therefore, a more universal research system for infrared radiation transmission characteristics of haze weather is proposed in this paper. With the help of meteorological data and the measured concentration of haze weather particles, a more universal particle spectrum distribution model is built, and the absorption, scattering and attenuation characteristics of haze weather particles are calculated according to Michele theory. Finally, the thermal radiation is calculated. In order to obtain more real and reliable effect, the transmittance of gas molecules is calculated by MODTRAN without considering the influence factors of scattering. In this paper, based on the introduction of the development status of atmospheric radiation transmission characteristics and its great application significance, the importance of studying infrared radiation characteristics in haze weather is analyzed. Then the basic theory of infrared radiation of haze and the radiation amount commonly used in infrared radiation calculation are described, and the causes of atmospheric radiation transmission attenuation in haze weather are analyzed. The atmospheric structure and related parameters are analyzed, the complex refractive index database of particles under haze condition is analyzed, the temperature and height are selected reasonably, and the scattering of haze weather particles is calculated according to the theory of Michele scattering. The scattering, attenuation and absorption coefficients of particles are calculated by attenuation and absorption factors, and finally the infrared radiation characteristics of 3 ~ 5 渭 m infrared band in haze weather are calculated. This method is more universal and has more extensive application value for haze weather target recognition.
【学位授予单位】：西安电子科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：X513;X87
【参考文献】
相关期刊论文 前1条
1 王明星,任丽新,吕位秀,曾伟,游荣高;大气气溶胶的粒度谱分布函数及其随高度的变化[J];大气科学;1984年04期
，本文编号：2486822
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