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	Three improved methods for measuring spectral emissivity based on the FTIR spectrometer
	Tian J.
	2013
关键词	FTIR spectrometer spectral emissivity temperature and emissivity separation (TES) gray body assumption land-surface emissivity separation algorithm infrared data scanner data temperature retrieval formulation
英文摘要	To minimize the uncertainties related to the FTIR spectrometer, three improved methods were proposed to measure the spectral emissivity. For method 1 (M-1) and method 2 (M-2), an invented device was used to change the environment radiation which makes the ill conditioned equation solvable. Method 3 (M-3) is based on the gray body assumption, and an iterative procedure was applied to derive the temperature of samples, then the spectral emissivity can be retrieved based on this temperature and the FTIR measurements. In order to validate these methods, the emissivity derived from the measured temperature was used as a reference. The results indicate that for the samples with high emissivity, such as quartz plates and cardboard, three improved methods have comparable accuracy; while for the samples with low emissivity, such as rusty iron plate and aluminum plate, the M-3 is more reliable than the other two methods. M-1 and M-2 need to go through more procedures than M-3, and this may lead to some deviation from the reality. Overall, three improved methods greatly improved the spectral emissivity measurements with FTIR spectrometer.
出处	Journal of Infrared and Millimeter Waves
卷	32
期	4
页	366-371
收录类别	SCI
语种	英语
ISSN号	1001-9014
内容类型	SCI/SSCI论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/30098]
专题	地理科学与资源研究所_历年回溯文献
推荐引用方式 GB/T 7714	Tian J.. Three improved methods for measuring spectral emissivity based on the FTIR spectrometer. 2013.

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