ueSTC 遥感地面数据采集与实验方法 1956 实验 实验三地物辐射参数采集实验 授课教师：周纪 办公室：创新中心B531 联系方式：jzhou233@uestc.edu.cn Incident Solar Radiation Reflected Atmosphere 口口 Gra Bare Soil Bullt-up Area
授课教师: 周 纪 办公室 : 创新中心B531 联系方式: jzhou233@uestc.edu.cn
1.辐射、热辐射与热红外遥感 热红外遥感应用非常广泛，如： 验方法》 灾害预警与监测（地震、林火、火山喷发等） 全球、区域气候变化（全球增温等 建筑能耗与人居环境评侍？城市热岛效应等) 环境监测（核电站废永监测等) 水文-生态过程（农田蒸散发、水资源管理等） 军事侦察
热红外遥感应用非常广泛，如： 灾害预警与监测（地震、林火、火山喷发等） 全球、区域气候变化（全球增温等） 建筑能耗与人居环境评估（城市热岛效应等） 环境监测（核电站废水监测等） 水文-生态过程（农田蒸散发、水资源管理等） 军事侦察
2.关键术语 2.1.1.9 Blackbody A blackbody is an ideal thermal emitter that transforms heat energy into radiant energy with maximum rate permitted by thermodynamic laws.Any real material at the same temperature cannot emit thermally at a rate exceeding that of a blackbody. Likewise,a blackbody must absorb and convert all incident radiant energy into heat energy regardless of the spectral band of the radiant energy (Colwell et al.1983). 9 2.1.1.14 Gray Body A gray body is a hypothetical source that would radiate as a blackbody but with an emissivity lower than unity and constant with wavelength.The gray body assumption is more useful as a first approximation to the actual emission of a real object or medium than is the ideal blackbody radiation.It is used in radiative transfer problem,for instance,in planetary atmospheres(Colwell et al.1983). 电寸
2.关键术语 2.1.1.10 Planck's Law Planck's law describes the spectral distribution of the radiation from a blackbody as (Planck 1914) B(T)= C (2.11) λ5[exp(号)-1] where Ba(T)is the spectral radiance [W m2 um sr]of a blackbody at temperature T [K]and wavelength A [um];Ci and C2 are the physical constants (C1=1.191×108Wum4sr-1m2,C2=1.439×104um.K). 2.1.1.11 Stefan-Boltzmann's Law Integrating the emitted radiance over the whole spectrum gives an expression for the total flux emitted by an isotropic blackbody of unit area.This is known as the Stefan-Boltzmann's law (Stefan 1879;Boltzmann 1884): M(T)=元。B(T)=aT4 (2.12) where M is the emitted radiant exitance,and o is the Stefan-Boltzmann constant (o=5.67×10-8Wm-2K-4)
2.关键术语 2.1.1.13 Spectral Emissivity (e) The land surface emissivity (s)is a measure of the ability of surface to emit thermal radiation.The spectral emissivity,s,is defined as the ratio of the spectral radiance,Ra(Is),emitted by a body at the temperature,I's,and the spectral radiance, Ba(Ts),emitted by a blackbody at the same temperature,Ts (Becker and Li 1995; Rees2001): Ra(Ts) (2.14) Bx(Ts) where Ba(Ts)is the Planck's law. 电子科技大