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星载高动态范围差分吸收成像光谱仪成像电路设计及实现

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光学精密工程 2024年第13期32卷 2017-2028页

作者：王煜陆亦怀周海金司福祺刘国华常振林方刘文清安徽大学物质科学与信息技术研究院安徽大学信息材料与智能感知安徽省实验室中国科学院合肥物质科学研究院安徽光学精密机械研究所环境光学与技术重点实验室

星载差分吸收成像光谱仪通常运行于太阳同步轨道，探测地表反射光的光谱并根据特征气体的谱线吸收强度测量区域内某些痕量气体浓度。第一代星载差分吸收光谱仪受限于探测器性能等原因，探测的动态范围不大，造成暗背景下数据信噪比低，... 详细信息

星载差分吸收成像光谱仪通常运行于太阳同步轨道，探测地表反射光的光谱并根据特征气体的谱线吸收强度测量区域内某些痕量气体浓度。第一代星载差分吸收光谱仪受限于探测器性能等原因，探测的动态范围不大，造成暗背景下数据信噪比低，亮背景下像元饱和。随着更大阱深，更高速度的探测器出现，第二代高动态范围的差分吸收成像光谱仪得以实现。本文介绍了高动态范围的差分吸收光谱仪成像电路的研制过程，包括器件选型，电路方案及电路测试，并对测试结果进行了分析。重点讨论了高动态范围的实现，给出了单点测量值的概念，提出了最大单点测量值的计算公式，解释了最大单点测量值与动态范围的关系，并评估了探测器件的单点探测能力，同时规划了未来进一步提高动态范围的方法，从而为同类设备的研制提供参考。

关键词：差分吸收光谱仪 CCD成像电路高动态范围卫星载荷

Three-Year Observations of Ozone Columns over Polar Vortex Edge Area above West Antarctica

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Advances in Atmospheric Sciences 2021年第7期38卷 1197-1208页

作者： Yuanyuan QIAN Yuhan LUO fuqi si Taiping YANG Dongshang YANG Key Laboratory of Environmental Optical and Technology Anhui Institute of Optics and Fine MechanicsHefei Institutes of Physical ScienceChinese Academy of SciencesHefei 230031China University of Science and Technology of China Hefei 230026China

Ozone vertical column densities(VCDs)were retrieved by Zenith Scattered Light-Differential Optical Absorption Spectroscopy(ZSL-DOAS)from January 2017 to February 2020 over Fildes Peninsula,West Antarctica(62.22°S,58.96°W).Each year,ozone VCDs started to decline around July with a comparable gradient around 1.4 Dobson Units(DU)per day,then dropped to their lowest levels in September and October,when ozone holes appeared(less than 220 DU).Daily mean values of retrieved ozone VCDs were compared with Ozone Monitoring Instrument(OMI)and Global Ozone Monitoring Experiment 2(GOME-2)satellite observations and the Modern-Era Retrospective analysis for Research and Applications Version 2(MERRA-2)reanalysis dataset,with correlation coefficients(R2)of 0.86,0.94,and 0.90,*** better understand the causes of ozone depletion,the retrieved ozone VCDs,temperature,and potential vorticity(PV)at certain altitudes were *** profiles of ozone and PV were positively correlated during their fluctuations,which indicates that the polar vortex has a strong influence on stratospheric ozone depletion during Antarctic *** at the edge of polar vortex,the observed data will provide a basis for further analysis and prediction of the inter-annual variations of stratospheric ozone in the future.

关键词： ozone VCDs ZSL-DOAS Antarctic ozone depletion polar vortex

Effect of spectral resolution on the measurement of monoaromatic hydrocarbons by DOAS

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Journal of Environmental Sciences 2008年第5期20卷 632-640页

作者： PENG Fumin XIE Pinhua ZHANG Yinghua ZHU Yanwu si fuqi LIU Wenqing WANG Junde Key Laboratory of Environmental Optical and Technology Anhui Institute of Optics and Fine Mechanics Chinese Academy of Sciences Hefei 230031 China College of Chemistry and Chemical Engineering Anhui University Hefei 230039 China Dalian Institute of Chemical Physics Chinese Academy of Sciences Dalian 116023 China

The excellent response characteristics and detection sensitivity with much lower operational cost and the capability to discriminate between the isomer of some monoaromatic hydrocarbons （MAHCs） make differential optical absorption spectroscopy （DOAS） a powerful tool to trace concentration variation of MAHCs. But due to the similarity in chemical structure, those MAHCs have the similar overlapped characteristic absorption structures, which make the selection of instrumental parameter critical to the accurate detection of MAHCs. Firstly, the spectral resolution used in DOAS system determines the nonlinear absorption of O2 and the mass dependence of characteristic absorption structure; thereby it determines the effect of elimination error of O2 absorption in the atmospheric spectra for the detection of MAHCs. Secondly, spectral resolution determines the differential absorption characteristics of twelve MAHCs representing major constituents in technical solvents used in the automobile industry and the interference of spectral overlapping. Thirdly, the spectral resolution determines the sensitivity, time resolution and linear range. So the spectral resolution range with the best ratio of signal to noise is used to determine the most suitable spectral resolution range, as well as the spectral resolution range that ensure the characteristic absorption structure of MAHCs and the minimization of O2 absorption interference. Finally, 0.15-0.16 nm （FWHM： full width at half maximum） is assumed to be closest to the optimum spectral resolution and it is confirmed by the results of practical measurement of MAHCs by DOAS.

关键词： differential optical absorption spectroscopy (DOAS) monoaromatic hydrocarbons (MAHCs) spectral resolution characteristic absorption structure

A Statistical Algorithm for Retrieving Background Value of Absorbing Aerosol Index Based on TROPOMI Measurements

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Advances in Atmospheric Sciences 2023年第6期40卷 1104-1116页

作者： Fuying TANG Weihe WANG fuqi si Haijin ZHOU Yuhan LUO Dongshang YANG Yuanyuan QIAN Key Laboratory of Environmental Optics and Technology Anhui Institute of Optics and Fine MechanicsHefei Institutes of Physical ScienceChinese Academy of SciencesHefei 230031China University of Science and Technology of China Hefei 230026China Key Laboratory of Radiometric Calibration and Validation for Environmental Satellites FengYun Meteorological Satellite Innovation Center(FY-MSIC)China Meteorological Administration(LRCVES/CMA)Beijing 100081China

The ultraviolet aerosol index(UVAI) is essential for monitoring the absorbing aerosols during aerosol events. UVAI depends on the absorbing aerosol concentration, the viewing geometry, and the temporal drift of radiometric sensitivity. To efficiently detect absorbing aerosols with the highest precision and to improve the accuracy of long-term UVAI estimates,the background UVAI must be examined through the UVAI retrieval. This study presents a statistical method that calculates the background value of UVAI using TROPOspheric Monitoring Instrument(TROPOMI) observation data over the Pacific Ocean under clear-sky scenes. Radiative transfer calculations were performed to simulate the dependence of UVAI on aerosol type and viewing geometry. We firstly applied the background UVAI to reducing the effects of viewing geometry and the degradation of the TROPOMI irradiance measurements on the UVAI. The temporal variability of the background UVAI under the same viewing geometry and aerosol concentration was identified. Radiative transfer calculations were performed to study the changes in background UVAI using Aerosol Optical Depth from the Moderate Resolution Imaging Spectroradiometer(MODIS) and reflectance measurements from TROPOMI as input. The trends of the temporal variations in the background UVAI agreed with the simulations. Alterations in the background UVAI expressed the reflectance variations driven by the changes in satellite state. Decreasing trends in solar irradiance at 340 and 380 nm due to instrument degradation were identified. Our findings are valuable because they can be applied to future retrievals of UVAI from the Environmental Trace Gases Monitoring Instrument(EMI) onboard the Chinese GaoFen-5 satellite.

关键词： ultraviolet aerosol index background UVAI TROPOMI reflectance degradation

First observation of tropospheric nitrogen dioxide from the Environmental Trace Gases Monitoring Instrument onboard the GaoFen-5 satellite

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Light(Science & Applications) 2020年第1期9卷 1389-1397页

作者： Chengxin Zhang Cheng Liu Ka Lok Chan Qihou Hu Haoran Liu Bo Li Chengzhi Xing Wei Tan Haijin Zhou fuqi si Jianguo Liu School of Earth and Space Sciences University of Science and Technology of ChinaHefei 230026China Department of Precision Machinery and Precision Instrumentation University of Science and Technology of ChinaHefei 230026China Key Laboratory of Environmental Optics and Technology Anhui Institute of Optics and Fine MechanicsChinese Academy of SciencesHefei 230031China Center for Excellence in Regional Atmospheric Environment Institute of Urban EnvironmentChinese Academy of SciencesXiamen 361021China Key Laboratory of Precision Scientific Instrumentation of Anhui Higher Education Institutes University of Science and Technology of ChinaHefei 230026China Remote Sensing Technology Institute(IMF) German Aerospace Center(DLR)OberpfaffenhofenGermany

The Environmental Trace Gases Monitoring Instrument(EMI)is the first Chinese satellite-borne UV–Vis spectrometer aiming to measure the distribution of atmospheric trace gases on a global *** EMI instrument onboard the GaoFen-5 satellite was launched on 9 May *** this paper,we present the tropospheric nitrogen dioxide(NO2)vertical column density(VCD)retrieval algorithm dedicated to EMI *** report the first successful retrieval of tropospheric NO_(2) VCD from the EMI *** retrieval improved the original EMI NO_(2) prototype algorithm by modifying the settings of the spectral fit and air mass factor calculations to account for the on-orbit instrumental performance *** retrieved EMI NO_(2) VCDs generally show good spatiotemporal agreement with the satellite-borne Ozone Monitoring Instrument and TROPOspheric Monitoring Instrument(correlation coefficient R of ~0.9,biassibly produce stable operational products that can contribute to global air pollution monitoring.

关键词： measurement dioxide satellite

Preliminary measurements of boundary layer reactive halogens based on MAXDOAS technique over Salt Lake in West China

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Acta Geologica sinica(English Edition) 2014年第S1期88卷 229-230页

作者： LUO Yuhan si fuqi DOU Ke ZHOU Haijin XIE Pinhua Anhui Institute of Optics and Fine Mechanism Chinese Academy of Sciences

The reactive halogens play key roles in the destruction of boundary layer ozone by catalytic reactions and provide a fast pathway to the sedimentation of elemental gaseous *** presence of bromine oxides in the lower

关键词： reactive halogens MAX-DOAS salt lake

Observations of stratospheric ozone above Ny-?lesund in the Arctic, 2010–2011

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Advances in Polar Science 2015年第3期26卷 256-263页

作者： LUO Yuhan si fuqi LIU Wenqing SUN Liguang LIU Yi Anhui Institute of Optics & Fine Mechanics Chinese Academy of Sciences Institute of Polar Environment School of Earth and Space Sciences University of Science and Technology of China National Synchrotron Radiation Laboratory University of Science and Technology of China

Stratosphere ozone depletion above the Arctic region has drawn increased attention recently. Here we present stratospheric ozone column densities above Ny-？lesund in the Arctic during summer 2010 and 2011, based on a self-developed passive differential optical absorption spectroscopy（DOAS） technique. By analyzing the received scattered solar spectrum, daily variations of ozone vertical column densities（VCDs） were obtained and correlated with satellite-borne ozone monitoring results and ozone sonde data. The comparisons showed good correlation, confirming the feasibility of DOAS in high-latitude Arctic regions. The preliminary analysis also demonstrated that abnormal low-level ozone columns found in spring 2011 had negative impacts on total ozone column densities over the entire year. The loss of stratospheric ozone may be correlated with low stratospheric temperatures, where heterogeneous atmospheric reactions were active.

关键词： ozone Arctic DOAS

CCD满阱自动化检测系统及其在相机研制中的应用

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光子学报 2023年第11期52卷 192-203页

作者：林方刘文清王煜常振司福祺中国科学技术大学环境科学与光电技术学院合肥230026 中国科学院合肥物质科学研究院安徽光学精密机械研究所环境光学与技术重点实验室合肥230031 安徽大学物质科学与信息技术研究院信息材料与智能感知安徽省实验室合肥230039

在相机研制过程中,电路参数的每次调整都伴随着对相机输出满阱的测试,参数调整繁复,满阱测试的次数过多。为获得最佳的满阱输出性能,对电路各项参数进行精确匹配,提高满阱测试的效率,设计了一套自动化满阱性能测试平台。研究了影响电荷... 详细信息

在相机研制过程中,电路参数的每次调整都伴随着对相机输出满阱的测试,参数调整繁复,满阱测试的次数过多。为获得最佳的满阱输出性能,对电路各项参数进行精确匹配,提高满阱测试的效率,设计了一套自动化满阱性能测试平台。研究了影响电荷耦合器件满阱性能的因素,建立了光子转移曲线模型,提出了一种光子转移曲线快速取点法,并讨论了模型和方法在满阱测试中的应用。搭建了包括光源系统、成像电路、和温度采集系统在内的测试平台,并完成了自动化流程的软硬件设计。将该测试平台应用于在研相机的测试,验证了平台构造和测试方法的正确性,测量精度优于±1.6%,满足科学级相机的研制使用要求。

关键词：电荷耦合器件光子转移曲线电路参数匹配满阱性能自动测试平台

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电厂烟囱烟羽截面断层重建研究

光学学报 2019年第5期39卷 17-24页

作者：钟鸣宇奚亮司福祺周海金王煜中国科学院安徽光学精密机械研究所安徽合肥230031 中国科学技术大学安徽合肥230031 安徽理工大学电气与信息工程学院安徽淮南232001

针对多轴差分吸收光谱仪重建图像的时间分辨率较低的问题,将成像差分吸收光谱仪技术与非负最小二乘法相结合,提出了一种新的重建二氧化硫(SO2)气体的空间二维分布的方法。采用Savitzky-Golay滤波器对采样得到的柱浓度数据进行预处理,使... 详细信息

针对多轴差分吸收光谱仪重建图像的时间分辨率较低的问题,将成像差分吸收光谱仪技术与非负最小二乘法相结合,提出了一种新的重建二氧化硫(SO2)气体的空间二维分布的方法。采用Savitzky-Golay滤波器对采样得到的柱浓度数据进行预处理,使用顺序坐标法进行重建,并利用克里金插值平滑重建图像。数值仿真结果表明,重建图像的接近度最低可达0.11。实验结果表明,所提方法从采集数据到完成图像重建的时间为52.37s,适用于捕捉烟羽截面的瞬态浓度,可实时重建SO2分布。

关键词：大气光学光学遥感环境光学烟羽重建顺序坐标法成像差分吸收光谱仪