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Preflight Evaluation of the Performance of the Chinese Environmental Trace Gas Monitoring Instrument (EMI) by Spectral Analyses of Nitrogen Dioxide

Zhang, Chengxin and Liu, Cheng and Wang, Yang and Si, Fuqi and Zhou, Haijin and Zhao, Minjie and Su, Wenjing and Zhang, Wenqiang and Chan, Ka Lok and Liu, Xiong and Xie, Pinhua and Liu, Jianguo and Wagner, Thomas (2018) Preflight Evaluation of the Performance of the Chinese Environmental Trace Gas Monitoring Instrument (EMI) by Spectral Analyses of Nitrogen Dioxide. IEEE Transactions on Geoscience and Remote Sensing, 56 (6), pp. 3323-3332. IEEE - Institute of Electrical and Electronics Engineers. ISSN 0196-2892

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Abstract

The Environmental trace gas Monitoring Instrument (EMI) onboard the Chinese high-resolution remote sensing satellite GaoFen-5 is an ultraviolet-visible imaging spectrometer, aiming to quantify the global distribution of tropospheric and stratospheric trace gases and planned to be launched in spring 2018. The preflight calibration phase is essential to characterize the properties and performance of the EMI in order to provide information for data processing and trace gas retrievals. In this paper, we present the first EMI measurement of nitrogen dioxide (NO 2 ) from a gas absorption cell using scattered sunlight as the light source by the differential optical absorption spectroscopy technique. The retrieved NO 2 column densities in the UV and Vis wavelength ranges are consistent with the column density in the gas cell calculated from the NO 2 mixing ratio and the length of the gas cell. Furthermore, the differences of the retrieved NO 2 column densities among the adjoining spatial rows of the detector are less than 3%. This variation is similar to the well-known “stripes-pattern” of the Ozone Monitoring Instrument and is probably caused by remaining systematic effects like a nonperfect description of the individual instrument functions. Finally, the signal-to-noise ratios of EMI in-orbit measurements of NO 2 are estimated on the basis of on-ground scattered sunlight measurements and radiative transfer model simulations. Based on our results, we conclude that the EMI is capable of measuring the global distribution of the NO 2 column with the retrieval precision and accuracy better than 3% for the tested wavelength ranges and viewing angles.

Item URL in elib:https://elib.dlr.de/129093/
Document Type:Article
Title:Preflight Evaluation of the Performance of the Chinese Environmental Trace Gas Monitoring Instrument (EMI) by Spectral Analyses of Nitrogen Dioxide
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Zhang, ChengxinUniversity of Science and Technology of ChinaUNSPECIFIED
Liu, ChengUniversity of Science and Technology of ChinaUNSPECIFIED
Wang, YangMPI MainzUNSPECIFIED
Si, FuqiAnhui Institute of Optics and Fine MechanicsUNSPECIFIED
Zhou, HaijinAnhui Institute of Optics and Fine MechanicsUNSPECIFIED
Zhao, MinjieAnhui Institute of Optics and Fine MechanicsUNSPECIFIED
Su, WenjingUniversity of Science and Technology of ChinaUNSPECIFIED
Zhang, WenqiangUniversity of Science and Technology of ChinaUNSPECIFIED
Chan, Ka LokKa.Chan (at) dlr.deUNSPECIFIED
Liu, XiongHarvard-Smithsonian Center for Astrophysics, Cambridge, MA, USAUNSPECIFIED
Xie, PinhuaAnhui Institute of Optics and Fine MechanicsUNSPECIFIED
Liu, JianguoAnhui Institute of Optics and Fine MechanicsUNSPECIFIED
Wagner, ThomasMPI MainzUNSPECIFIED
Date:June 2018
Journal or Publication Title:IEEE Transactions on Geoscience and Remote Sensing
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:56
Page Range:pp. 3323-3332
Publisher:IEEE - Institute of Electrical and Electronics Engineers
ISSN:0196-2892
Status:Published
Keywords:air pollution measurement;atmospheric composition;atmospheric measuring apparatus;atmospheric spectra;atmospheric techniques;calibration;ozone;radiative transfer;remote sensing;stratosphere;sunlight;preflight evaluation;Chinese Environmental trace gas Monitoring Instrument;spectral analyses;nitrogen dioxide;Chinese high-resolution remote sensing satellite GaoFen-5;ultraviolet-visible imaging spectrometer;global distribution;stratospheric trace gases;preflight calibration phase;data processing;trace gas retrievals;EMI measurement;gas absorption cell;differential optical absorption spectroscopy technique;2 column densities;column density;gas cell;2 mixing ratio;Ozone Monitoring Instrument;individual instrument functions;on-ground scattered sunlight measurements;retrieval precision;NO2;Electromagnetic interference;Atmospheric measurements;Calibration;Instruments;Extraterrestrial measurements;Gases;Absorption;Differential optical absorption spectroscopy (DOAS);NO₂;remote sensing;satellite;spectral analysis;trace gases
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Earth Observation
DLR - Research area:Raumfahrt
DLR - Program:R EO - Erdbeobachtung
DLR - Research theme (Project):Vorhaben Spectroscopic Methods in Remote Sensing
Location: Oberpfaffenhofen
Institutes and Institutions:Remote Sensing Technology Institute > Atmospheric Processors
Deposited By: Chan, Ka Lok
Deposited On:23 Sep 2019 11:57
Last Modified:01 Jun 2020 03:00

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