Effects of spectral sampling rate and range of CO2 absorption bands on XCO2 retrieval from TanSat hyperspectral spectrometer

	Effects of spectral sampling rate and range of CO2 absorption bands on XCO2 retrieval from TanSat hyperspectral spectrometer
	Liu Y.; Cai Z. N.; Yang D. X.; Zheng Y. Q.; Duan M. Z.; Lu D. R.
	2014
发表期刊	中文 Science Bulletin
ISSN	ISBN/1001-6538
卷号	59 期号:14 页码:1485-1491
摘要	The spectral sampling rate and range of CO2 absorption bands are critical for the optimal design of hyperspectral instrument for CO2 observation satellite. Undersampling of spectra in space-based spectrometer significantly contaminates signals measured in the CO2 1.61 mu m-band. The CO2 dry-air column (XCO2) error due to spectral undersampling can be up to similar to 1 ppm, which is the target precision of the 中文 Carbon Satellite (TanSat) for a single sounding. Undersampling error depends on surface albedo, solar zenith angle, and scattering properties in the atmosphere. The spectral sampling rate is recommended to be greater than 2.0 pixels per full width at half maximum to avoid undersampling. Reduction of spectral resolution and the use of narrower spectral regions can improve spectral sampling with little changes in CO2 retrieval sensitivity without losing much information. The full-band approach provides direct constraints on the wavelength-dependent surface albedo and particle scattering from the measurements. To keep a broader band, we recommend reduction of the spectral resolution by a factor of two.
收录类别	SCI
语种	英语
文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/43943
专题	中科院长春光机所知识产出
推荐引用方式 GB/T 7714	Liu Y.,Cai Z. N.,Yang D. X.,et al. Effects of spectral sampling rate and range of CO2 absorption bands on XCO2 retrieval from TanSat hyperspectral spectrometer[J]. 中文 Science Bulletin,2014,59(14):1485-1491.
APA	Liu Y.,Cai Z. N.,Yang D. X.,Zheng Y. Q.,Duan M. Z.,&Lu D. R..(2014).Effects of spectral sampling rate and range of CO2 absorption bands on XCO2 retrieval from TanSat hyperspectral spectrometer.中文 Science Bulletin,59(14),1485-1491.
MLA	Liu Y.,et al."Effects of spectral sampling rate and range of CO2 absorption bands on XCO2 retrieval from TanSat hyperspectral spectrometer".中文 Science Bulletin 59.14(2014):1485-1491.

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