Preflight calibration of the Chinese Environmental Trace Gases Monitoring Instrument (EMI)

doi:10.5194/amt-11-5403-2018

CORC > 合肥物质科学研究院 > 中国科学院合肥物质科学研究院 > 中科院安徽光学精密机械研究所

	Preflight calibration of the Chinese Environmental Trace Gases Monitoring Instrument (EMI)
	Zhao, Min Jie; Si, Fu Qi; Zhou, Hai Jin; Wang, Shi Mei; Jiang, Yu; Liu, Wen Qing
刊名	ATMOSPHERIC MEASUREMENT TECHNIQUES
	2018-09-28
卷号	11 期号:9 页码:5403-5419
ISSN号	1867-1381
DOI	10.5194/amt-11-5403-2018
通讯作者	Si, Fu Qi(sifuqi@aiofm.ac.cn)
英文摘要	An environmental trace gases monitoring instrument (EMI) is a nadir-viewing wide-field imaging spectrometer, which aims to quantify the global distribution of tropospheric and stratospheric trace gases, and is planned to be launched on 9 May 2018. The selected wavelength bands for EMI are ultraviolet channels: UV1 (240-315 nm), UV2 (311-403 nm) and visible channels: VIS1 (401-550 nm), and VIS2 (545-710 nm). The spectral resolution is 0.3-0.5 nm, and the swath is approximately 114 degrees wide to achieve a one-day global coverage. The preflight calibration of the EMI is discussed in this paper. A tunable laser and rotating platform are adopted for an EMI wavelength calibration of the entire field of view. The accuracy of the wavelength calibration is less than 0.05 nm. In addition, the solar calibration mode shows the same results compared with Earth observation mode. A thermal vacuum test is performed to investigate the influence of in-orbit thermal vacuum conditions on the EMI, and EMI spectral response changes with pressure, optical bench temperature, and charge-coupled device (CCD) detector temperature are obtained. For a radiometric calibration of UV1, a diffuser plate with a 1000 W xenon lamp, which produces sufficient UV output, is selected. An integrating sphere system with tungsten halogen lamp is selected for the UV2, VIS1, and VIS2. The accuracies of radiance calibration are 4.53% (UV1), 4.52% (UV2), 4.31% (VIS1), and 4.30%(VIS2). The goniometry correction factor and irradiance response coefficient of the EMI are also calibrated on the ground for an in-orbit calibration of the solar. A signal-to-noise ratio (SNR) model of the EMI is introduced, and the EMI in-orbit SNR is estimated using the SNR and MODTRAN radiance models.
资助项目	National Natural Science Foundation of China[41705016]
WOS关键词	REFLECTANCE DISTRIBUTION FUNCTION ; SCIAMACHY ; GOME
WOS研究方向	Meteorology & Atmospheric Sciences
语种	英语
出版者	COPERNICUS GESELLSCHAFT MBH
WOS记录号	WOS:000445906400001
资助机构	National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/39135]
专题	合肥物质科学研究院_中科院安徽光学精密机械研究所
通讯作者	Si, Fu Qi
作者单位	Chinese Acad Sci, Anhui Inst Opt & Fine Mech, Key Lab Environm Opt & Technol, Hefei 230031, Peoples R China
推荐引用方式 GB/T 7714	Zhao, Min Jie,Si, Fu Qi,Zhou, Hai Jin,et al. Preflight calibration of the Chinese Environmental Trace Gases Monitoring Instrument (EMI)[J]. ATMOSPHERIC MEASUREMENT TECHNIQUES,2018,11(9):5403-5419.
APA	Zhao, Min Jie,Si, Fu Qi,Zhou, Hai Jin,Wang, Shi Mei,Jiang, Yu,&Liu, Wen Qing.(2018).Preflight calibration of the Chinese Environmental Trace Gases Monitoring Instrument (EMI).ATMOSPHERIC MEASUREMENT TECHNIQUES,11(9),5403-5419.
MLA	Zhao, Min Jie,et al."Preflight calibration of the Chinese Environmental Trace Gases Monitoring Instrument (EMI)".ATMOSPHERIC MEASUREMENT TECHNIQUES 11.9(2018):5403-5419.