敦煌辐射校正场太阳光度计现场定标
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摘要
为保证卫星在轨自动化定标中气溶胶光学特性观测的精度,针对基于相对稳定大气条件的Langley定标和基于高精度参考仪器的交叉定标,开展了辐射校正场太阳光度计的现场定标技术研究.定标结果表明高精度太阳光度计Langley定标和交叉定标与CE318太阳光度计反演的气溶胶光学厚度最大偏差分别在0.015和0.01以内.计算分析了大气条件、仪器参数等对现场定标的影响,将定标后的仪器和CE318太阳光度计放在青海湖同步比对观测,气溶胶光学厚度最大偏差在0.01以内.敦煌辐射校正场太阳光度计现场定标误差对卫星在轨定标的影响不超过0.21%,表明定标结果能够满足卫星在轨自动化定标的精度要求.
In order to ensure the accuracy of aerosol optical characteristics observation in on-orbit automatic calibration of satellites,field calibration techniques of sunphotometer in Dunhuang test site were studied,including Langley calibration based on relatively stable atmospheric conditions and cross calibration based on high precision reference instruments.The calibration results show that the maximum deviations of aerosol optical depth inversion from high precision sunphotometer compared with CE318 sunphotometer are within 0.015 and 0.01 respectively by Langley method and cross-calibration method.The effects of atmospheric conditions and instrument parameters on field calibration were calculated and analyzed.The calibrated high precision sunphotometer and CE318 sunphotometer were placed in Qinghai Lake for synchronous comparison observation.The maximum deviation of aerosol optical depth is within0.01.The influence of field calibration error of sunphotometer in Dunhuang test site on on-orbit calibration of satellite is less than 0.21%,which shows that the calibration results can meet the accuracy requirements of satellite on-orbit automatic calibration.
In order to ensure the accuracy of aerosol optical characteristics observation in on-orbit automatic calibration of satellites,field calibration techniques of sunphotometer in Dunhuang test site were studied,including Langley calibration based on relatively stable atmospheric conditions and cross calibration based on high precision reference instruments.The calibration results show that the maximum deviations of aerosol optical depth inversion from high precision sunphotometer compared with CE318 sunphotometer are within 0.015 and 0.01 respectively by Langley method and cross-calibration method.The effects of atmospheric conditions and instrument parameters on field calibration were calculated and analyzed.The calibrated high precision sunphotometer and CE318 sunphotometer were placed in Qinghai Lake for synchronous comparison observation.The maximum deviation of aerosol optical depth is within0.01.The influence of field calibration error of sunphotometer in Dunhuang test site on on-orbit calibration of satellite is less than 0.21%,which shows that the calibration results can meet the accuracy requirements of satellite on-orbit automatic calibration.
引文
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[18] WEI Wei.Research on long time series radiometric calibration of satellite sensor based on global calibration site network[D].Hefei:University of Science and Technology of China,2017:119-120.韦玮.基于全球定标网的卫星遥感器长时间序列定标方法研究[D].合肥:中国科学技术大学,2017:119-120.
[2] LI Xin,ZHENG Xiao-bing,YIN Ya-peng.Progress in automated site vicarious calibration technologies[J].Journal of Atmospheric and Environmental Optics,2014,9(1):17-21.李新,郑小兵,尹亚鹏.场地自动化定标技术进展[J].大气与环境光学学报,2014,9(1):17-21.
[3] QIU Gang-gang.Development and calibration applications of automatic observation system on satellite radiometric calibration site[D].Hefei:University of Science and Technology of China,2017:23-24邱刚刚.卫星辐射校正场自动化观测系统的研制与定标应用[D].合肥:中国科学技术大学,2017:23-24.
[4] WU Yun-fei,ZHU Jun,CHE Hui-zheng,et al.Column-integrated aerosol optical properties and direct radiative forcing based on sun photometer measurements at a semi-arid rural site in Northeast China[J].Atmospheric Research,2015,157:56-65.
[5] KAZADZIS S,KOUREMETI N,DIMOZ H,et al.Results from the 4th WMO filter radiometer comparison for aerosol optical depth measurements[J].Atmospheric Chemistry Physics,2018,18(5):3185-3201.
[6] HOLBEN B N,ECK T F,SLUTSKER I,et al.AERONET-a federated instrument network and data archive for aerosol characterization[J].Remote Sensing of Environment,1998,66(1):1-16.
[7] LI Zheng-qiang,LI Dong-hui,LI Kai-tao,et al.Sun-sky radiometer observation network with the extension of multiwavelength polarization measurements[J].Journal of Remote Sensing,2015,19(3):495-519李正强,李东辉,李凯涛,等.扩展多波长偏振测量的太阳—天空辐射计观测网[J].遥感学报,2015,19(3):495-519.
[8] HU Fang-chao,WANG Zhen-hui,ZHANG Bing,et al.Study on the field calibration of sunphotometer CE318for the direct radiation channels[J].Acta Optica Sinica,2009,29(s2):322-326胡方超,王振会,张兵,等.太阳光度计CE318直射通道的室外定标研究[J].光学学报,2009,29(s2):322-326.
[9] XIN Jin-yuan,WANG Yue-si,LI Zhan-qing,et al.Introduction and calibration of the Chinese sun hazemeter network[J].Chinese Journal of Enviromental Science,2006,27(9):1697-1702.辛金元,王跃思,李占清,等.中国地区太阳分光辐射观测网的建立与仪器标定[J].环境科学,2006,27(9):1697-1702.
[10] ZHANG Jun-hua,WANG Mei-hua,MAO Jie-tai.Error analysis and correction for multi-wavelength sun-photometer aerosol remote sensing[J].Chinese Journal of Atmosphere Sciences,2000,24(6):855-859.张军华,王美华,毛节泰.多波段光度计遥感气溶胶误差分析及订正[J].大气科学,2000,24(6):855-859.
[11] LEE K H,LI Zhan-qing,CRIBB M C,et al.Aerosol optical depth measurements in eastern China and a new calibration method[J].Journal of Geophysical Research Atmospheres,2010,115:D00K11.
[12] CHE Hui-zheng,ZHANG Xiao-ye,CHEN Hong-bin,et al.Instrument calibration and aerosol optical depth validation of the China Aerosol Remote Sensing Network[J].Journal of Geophysical Research,2009,114(D3):D03206.
[13] CERQUEIRA J G,FERNANDEZ J H,HOELZEMANN J J,et al.Langley method applied in study of aerosol optical depth in the Brazilian semiarid region using 500,670and 870nm bands for sun photometer calibration[J].Advances in Space Research,2014,54(8):1530-1543.
[14] CAMPANELLI M,NAKAJIMA T,OLIVIERI B.Determination of the solar calibration constant for a sun-sky radiometer:proposal of an in-situ procedure[J].Applied Optics,2004,43(3):651.
[15] SHAW G E.Error analysis of multi-wavelength sun photometry[J].Pure&Applied Geophysics,1976,114(1):1-14.
[16] BOXM A.Finite bandwidth and scattered light effects on the radiometric determination of atmospheric turbidity and the solar constant[J].Applied Optics,1981,20(13):2215-2219.
[17] CARLOS T,RAMIRO G,DAVID F,et al.Assessment of sun photometer langley calibration at the high-elevation sites Mauna Loa and Izaa[J].Atmospheric Chemistry and Physics,2018,18(19):14555-14567.
[18] WEI Wei.Research on long time series radiometric calibration of satellite sensor based on global calibration site network[D].Hefei:University of Science and Technology of China,2017:119-120.韦玮.基于全球定标网的卫星遥感器长时间序列定标方法研究[D].合肥:中国科学技术大学,2017:119-120.
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