基于亮温光谱法的大气污染气体探测  

Remote sensing of pollution cloud by passive Fourier transform infrared spectrometry

作　　者：熊伟[1] 方勇华[1] 黄烨[1] 兰天鸽[1] 董大明[1] 李大成[1] 

机构地区：[1]中国科学院安徽光学精密机械研究所,安徽合肥230031

出　　处：《光电工程》2006年第4期27-30,共4页Opto-Electronic Engineering

摘　　要：在利用被动傅里叶变换红外光谱仪进行大气污染气体的探测识别研究时，由于作为背景的自然界的大部分物质的发射率很高，并且在700～1300cm^-1范围近似为常数，因此，可利用计算具有常数基线的亮温光谱的方法来进行探测。该方法不需要预先测量背景光谱，能直接从亮温光谱中扣除掉背景及干扰信号，提取出目标。Environmental monitoring with Fourier transform infrared （FTIR） spectrometer offers an effective method for the identification of hazardous gas pollutants. Infrared spectroscopy reveals the spectral signature of the pollutant when there is a temperature difference between the pollutant and the background radiation, resulting in emission or absorption by the pollutant. An algorithm of signal processing, without background subtraction, has been studied to extract directly the spectral signatures of the pollutant based on the analysis of the brightness temperature spectrum. It is better suited for analysis than the radiance.

关 键 词：红外光谱仪 傅里叶变换光谱仪 遥感探测 大气污染 

分 类 号：TH744.1[机械工程—光学工程]