Evaluations of Environmental Trace Gases Monitoring Instrument (EMI) Level 1 Data
文献类型：期刊论文
| 作者 | Cheng Liang-xiao1,2; Tao Jin-hua1; Zhou Hai-jin3 ; Yu Chao1; Fan Meng1; Wang Ya-peng4; Wang Zhi-bao5; Chen Liang-fu1
|
| 刊名 | SPECTROSCOPY AND SPECTRAL ANALYSIS
 |
| 出版日期 | 2021-12-01 |
| 卷号 | 41 |
| 关键词 | GF-5 EMI Wavelength calibration Slit function Data quality |
| ISSN号 | 1000-0593 |
| DOI | 10.3964/j.issn.1000-0593(2021)12-3881-06 |
| 通讯作者 | Tao Jin-hua(taojh@radi.ac.cn) |
| 英文摘要 | The Environmental trace gases Monitoring Instrument (EMI) is the first high spectral resolution imaging spectrometer in China designed to monitor trace gas in tropospheric and stratospheric. To fully understand the instrument's characteristics and make better use of the level 1 (L1 ) data, comprehensive evaluations of irradiance and radiance data measured by the EMI instrument were carried out in this study. For both ultraviolet-2 and visible-1 bands, the slit function change drastically as a function of detectors in the across-track direction of charge-coupled device (CCD) , which is more than 6 times larger than that of TROP(OMI). The use of different slit functions according to the row can improve the calibration accuracy. Small wavelength shifts were found in both irradiance and radiance data with an average value of 0. 015 and 0. 03 nm, respectively. Although they meet the requirement of the design specification (0. 05 nm) , wavelength calibration is still needed during the trace gas retrieval. EMI irradiance data agree highly (r>0. 95) with OMI and TROPOMI and the reference solar spectrum. EMI radiance data also shows a better agreement (r>0. 93) with OMI and TROPOMI by averaging the cloud-free pixels over the clean Pacific region. This study demonstrates the good quality of current EMI L1 data for trace gas retrieval, and it provides a reference for the design and data quality evaluation scheme of subsequent instruments. |
| WOS关键词 | COLUMN DENSITY RETRIEVAL ; NITROGEN-DIOXIDE ; SENTINEL-5 PRECURSOR ; TROPOMI ; CALIBRATION ; ALGORITHM ; FORMALDEHYDE ; QUALITY ; CLIMATE |
| WOS研究方向 | Spectroscopy |
| 语种 | 英语 |
| WOS记录号 | WOS:000747245000038 |
| 出版者 | OFFICE SPECTROSCOPY & SPECTRAL ANALYSIS |
| 源URL | [http://ir.hfcas.ac.cn:8080/handle/334002/127506]  |
| 专题 | 中国科学院合肥物质科学研究院 |
| 通讯作者 | Tao Jin-hua |
| 作者单位 | 1.Beijing Normal Univ, Chinese Acad Sci, Aerosp Informat Res Inst, State Key Lab Remote Sensing Sci, Beijing 100101, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Anhui Inst Opt & Fine Mech, Key Lab Environm Opt & Technol, Hefei 230031, Peoples R China 4.China Meteorol Adm, Natl Satellite Meteorol Ctr, Beijing 100081, Peoples R China 5.Northeast Petr Univ, Sch Comp & Informat Technol, Daqing 163318, Peoples R China |
| 推荐引用方式 GB/T 7714 | Cheng Liang-xiao,Tao Jin-hua,Zhou Hai-jin,et al. Evaluations of Environmental Trace Gases Monitoring Instrument (EMI) Level 1 Data[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS,2021,41. |
| APA | Cheng Liang-xiao.,Tao Jin-hua.,Zhou Hai-jin.,Yu Chao.,Fan Meng.,...&Chen Liang-fu.(2021).Evaluations of Environmental Trace Gases Monitoring Instrument (EMI) Level 1 Data.SPECTROSCOPY AND SPECTRAL ANALYSIS,41. |
| MLA | Cheng Liang-xiao,et al."Evaluations of Environmental Trace Gases Monitoring Instrument (EMI) Level 1 Data".SPECTROSCOPY AND SPECTRAL ANALYSIS 41(2021). |
入库方式： OAI收割
来源：合肥物质科学研究院
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