基于场地自动化观测技术的SNPP VIIRS高频次在轨辐射定标
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摘要
针对遥感卫星高频次、高时效和高精度定标的技术需求,利用布设在敦煌辐射校正场自动化定标系统,对SNPP VIIRS遥感器的可见光到短波红外波段开展了高频次自动化绝对辐射定标试验,详细描述了自动化定标的原理和方法,明确了定标流程.针对长时间跨度中,地表光谱反射率光谱形状的变化,建立了参考反射率数据库,以解决通道反射率与参考反射率光谱形状不匹配问题.在2018年5月～11月,对SNPP VIIRS共完成了13次有效的自动化定标,并与SNPP VIIRS星上观测的表观反射率进行了比对验证.结果表明,场地自动化定标得到的表观反射率与卫星观测的表观反射率相对偏差小于5%,均方根小于3.2%,表明场地自动化定标结果与星上定标结果具有较高的一致性和稳定性,可以用于高频次在轨辐射定标.
The automatic calibration system laid in Dunhuang radiometric calibration site was adopted to carry out the high-frequency automatic absolute radiometric calibration experiment from the visible to short-wave infrared of SNPP VIIRS remote sensor in allusion to the high-frequency,high-aging and highprecision calibration of remote sensing satellites.The principle automatic calibration was described in detail.In order to solve the mismatching problem between the channel reflectance and the reference reflectance spectral shape,a reference reflectance database was established for the change of the spectral shape of the surface spectral reflectance in a long-time span.A total of 13 effective automated calibrations of SNPP VIIRS were completed and compared with the apparent reflectance observed on SNPP VIIRS satellite from May to November,2018.The results show that the relative deviation of the apparent reflectance obtained from the site automatic calibration and satellite is less than 5%,and the root mean square is less than 3.2%.This phenomenon indicates that the automatic calibration results of the site and the satellite have a high consistency and stability,which could be used for the high-frequency on-orbit radiometric calibration.
The automatic calibration system laid in Dunhuang radiometric calibration site was adopted to carry out the high-frequency automatic absolute radiometric calibration experiment from the visible to short-wave infrared of SNPP VIIRS remote sensor in allusion to the high-frequency,high-aging and highprecision calibration of remote sensing satellites.The principle automatic calibration was described in detail.In order to solve the mismatching problem between the channel reflectance and the reference reflectance spectral shape,a reference reflectance database was established for the change of the spectral shape of the surface spectral reflectance in a long-time span.A total of 13 effective automated calibrations of SNPP VIIRS were completed and compared with the apparent reflectance observed on SNPP VIIRS satellite from May to November,2018.The results show that the relative deviation of the apparent reflectance obtained from the site automatic calibration and satellite is less than 5%,and the root mean square is less than 3.2%.This phenomenon indicates that the automatic calibration results of the site and the satellite have a high consistency and stability,which could be used for the high-frequency on-orbit radiometric calibration.
引文
[1]LV Jia-yan,HE Ming-yuan CHEN Lin.Automated radiation calibration method based on Dunhuang radiometric calibration site[J].Acta Optica Sinica,2017,37(8):0801003.吕佳彦,何明元,陈林.基于敦煌辐射校正场的自动化辐射定标方法[J].光学学报,2017,37(8):0801003.
[2]LIU En-chao,LI Xin,WEI Wei.Automatic field calibration and analysis of satillite based on hyper-spectral radio radiometer[J].Spectroscopy and Spectral Analysis,2016,36(12):40776.刘恩超,李新,韦玮.基于超光谱比值辐射仪的卫星自动化场地定标与分析[J].光谱学与光谱分析,2016,36(12):40776.
[3]LI Yuan,RONG Zhi-guo,ZHENG Zhao-jun.Post launch site calibration of visible and near-infrared channel of FY-3Avisible and infrared radiometers[J].Optics and Precision Engineering,2009,17(12):2966.李元,戎志国,郑照军.FY-3A扫描辐射计的可见近红外通道在轨场地定标[J].光学精密工程,2009,17(12):2966.
[4]LI Xin,ZHENG Xiao-bing,YIN Ya-peng.Progress in automated sitevicarious 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.
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[9]DANA X K,BRUEGGE C J.On-orbit calibration of the EO-1hyperion and advanced land imager(ALI)sensors using the LED spectrometer(LSpec)automated facility[J].IEEE Transactions on Geoscience and Remote Sensing,2009,47(4):1244-1255.
[10]QIU Gang-gang,LI Xin,WEI Wei.Experiment and analysis of on-orbit radiometric calibration for remote sensors based on in-site automated observation technology[J].Acta Optica Sinica,2016,36(7):0701001.邱刚刚,李新,韦玮等.基于场地自动化观测技术的遥感器在轨辐射定标试验与分析[J].光学学报,2016,36(7):0701001.
[11]WEI Wei.Research on long time serice radiometric calibration of satellite sensor based on global calibration site network[D].Hefei:University of Science and Technology of China,2017:1-10.韦玮.基于全球定标场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,2017:1-10.
[12]DONG Yi,LV Jia-yan,SONG Qing-tao.Introduction to the principle and process of reflectivity basic radiation calibration technology innovation and application[J].Technological Innovation and Application,2016,24,71-72.董毅,吕佳彦,宋青涛.反射率基法辐射定标原理和流程介绍[J].科技创新与应用,2016,24:71-72.
[13]University of Wyoming[DB/OL].[2018-11-26].http://weather.uwyo.edu/.
[14]NASA[DB/OL].[2018-11-26].ftp://toms.gsfc.nasa.gov/pub/omi/data/ozone/.
[15]WANG Ling,HU Xiu-qing,CHEN Lin.FY-3C/MERSI calibration for solar band using multi-reflectance stable targets[J].Optics and Precision Engineering,2015,23(7):1911-1920.王玲,胡秀清,陈林.基于多种亮度稳定目标的FY-3C/中分辨率光谱成像仪的反射太阳波段辐射定标[J].光学精密工程,2015,23(7):1911-1920.
[16]WEI Wei,ZHANG Yan-na,ZHANG Meng.Multisite high-frequency radiometric calibration of GF-1wide field of view[J].Acta Photonica Sinica,2018,47(2):0228001.韦玮,张艳娜,张孟等.高分一号宽视场成像仪多场地高频次辐射定标[J].光子学报,2018,47(2):0228001.
[17]YU Tang-qi,WEI Wei,ZHANG Yan-na.Analysis of the BRDF characteristics of Dunhuang radiometric calibration site in the spring[J].Acta Photonica Sinica,2018,47(6):0612004.余谭其,韦玮,张艳娜.敦煌辐射校正场春季BRDF特性分析[J].光子学报,2018,47(6):0612004.
[18]WEI Wei,SONG Shuai.Development and application of automated vicarious calibration system[J].Chinese Optics Letters,2017,15(10):100101.
[19]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,2017:28-34.邱刚刚.卫星辐射校正场自动化观测系统[D].合肥:中国科学技术大学,2017:28-34.
[20]SUN Ling,GUO Mao-hua,XU Na.On-orbit response variation of FY-3 MERSI reflective solar bands based on Dunhuang site calibration[J].Spectroscopy and Spectral Analysis,2012,32(7):1870-1877.孙凌,郭茂华,徐娜.基于敦煌场地定标的FY-3 MERSI反射太阳波段在轨响应变化分析[J].光谱学与光谱分析,2012,32(7):1870-1877.
[21]BIGGAR S F.In-flight methods for satellite sensor absolute radiometric calibration[D].Tucson:University of Arizona,1990:142-145.
[22]ZHANG Yu-xiang,ZHANG Guang-shun,HUANG Yi-bin.In-flight vicarious radiometric calibration for VIS-NIRchannels of FY-1Csatellite sensor at Dunhuang site[J].Acta Meteorologica Sinica,2002,60(6):740-747.张玉香,张广顺,黄意玢.FY-1C遥感器可见-近红外各通道在轨辐射定标[J].气象学报,2002,60(6):740-747.
[23]ZHANG Yu-xiang,QIU Kang-mu,HU Xiu-qing.Vicarious radiometric calibration of satellite FY-1Dsensors at visible and near infrared channels[J].Acta Meteorologica Sinica,2004,18(4):501-516.
[24]BIGGAR S F,SLATER P N,GELLMAN D I.Uncertainties in the in-flight calibration of sensors with reference to measured ground sites in the 0.4to 1.1μm range[J].Remote Sensing of Environment,1994,48:245-252.
[2]LIU En-chao,LI Xin,WEI Wei.Automatic field calibration and analysis of satillite based on hyper-spectral radio radiometer[J].Spectroscopy and Spectral Analysis,2016,36(12):40776.刘恩超,李新,韦玮.基于超光谱比值辐射仪的卫星自动化场地定标与分析[J].光谱学与光谱分析,2016,36(12):40776.
[3]LI Yuan,RONG Zhi-guo,ZHENG Zhao-jun.Post launch site calibration of visible and near-infrared channel of FY-3Avisible and infrared radiometers[J].Optics and Precision Engineering,2009,17(12):2966.李元,戎志国,郑照军.FY-3A扫描辐射计的可见近红外通道在轨场地定标[J].光学精密工程,2009,17(12):2966.
[4]LI Xin,ZHENG Xiao-bing,YIN Ya-peng.Progress in automated sitevicarious 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.
[5]CZAPLA-MYERS J S.Automated ground-based methodology in support of vicarious calibration[D].Tucson:The University of Arizona,2006:41-43,54-57.
[6]CZAPLA-MYERS J S,LESSON N P.Radiometric calibration of earth-oberving sensors using an automated test site at Railroad valley,Nevada[J].Canadian Journal of Remote Sensing,2010,36(5):474-487.
[7]WANG Ning,LI Chuan-rong.Ground based automated radiometric calibration system in Baotou site,China[C].SPIE,2017,10427:104271J.
[8]SCHMECHTIG C,SANTER R P,ROGER J C,et al.Automated ground-based station for vicarious calibration[C].SPIE,1997,3221:309-317.
[9]DANA X K,BRUEGGE C J.On-orbit calibration of the EO-1hyperion and advanced land imager(ALI)sensors using the LED spectrometer(LSpec)automated facility[J].IEEE Transactions on Geoscience and Remote Sensing,2009,47(4):1244-1255.
[10]QIU Gang-gang,LI Xin,WEI Wei.Experiment and analysis of on-orbit radiometric calibration for remote sensors based on in-site automated observation technology[J].Acta Optica Sinica,2016,36(7):0701001.邱刚刚,李新,韦玮等.基于场地自动化观测技术的遥感器在轨辐射定标试验与分析[J].光学学报,2016,36(7):0701001.
[11]WEI Wei.Research on long time serice radiometric calibration of satellite sensor based on global calibration site network[D].Hefei:University of Science and Technology of China,2017:1-10.韦玮.基于全球定标场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,2017:1-10.
[12]DONG Yi,LV Jia-yan,SONG Qing-tao.Introduction to the principle and process of reflectivity basic radiation calibration technology innovation and application[J].Technological Innovation and Application,2016,24,71-72.董毅,吕佳彦,宋青涛.反射率基法辐射定标原理和流程介绍[J].科技创新与应用,2016,24:71-72.
[13]University of Wyoming[DB/OL].[2018-11-26].http://weather.uwyo.edu/.
[14]NASA[DB/OL].[2018-11-26].ftp://toms.gsfc.nasa.gov/pub/omi/data/ozone/.
[15]WANG Ling,HU Xiu-qing,CHEN Lin.FY-3C/MERSI calibration for solar band using multi-reflectance stable targets[J].Optics and Precision Engineering,2015,23(7):1911-1920.王玲,胡秀清,陈林.基于多种亮度稳定目标的FY-3C/中分辨率光谱成像仪的反射太阳波段辐射定标[J].光学精密工程,2015,23(7):1911-1920.
[16]WEI Wei,ZHANG Yan-na,ZHANG Meng.Multisite high-frequency radiometric calibration of GF-1wide field of view[J].Acta Photonica Sinica,2018,47(2):0228001.韦玮,张艳娜,张孟等.高分一号宽视场成像仪多场地高频次辐射定标[J].光子学报,2018,47(2):0228001.
[17]YU Tang-qi,WEI Wei,ZHANG Yan-na.Analysis of the BRDF characteristics of Dunhuang radiometric calibration site in the spring[J].Acta Photonica Sinica,2018,47(6):0612004.余谭其,韦玮,张艳娜.敦煌辐射校正场春季BRDF特性分析[J].光子学报,2018,47(6):0612004.
[18]WEI Wei,SONG Shuai.Development and application of automated vicarious calibration system[J].Chinese Optics Letters,2017,15(10):100101.
[19]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,2017:28-34.邱刚刚.卫星辐射校正场自动化观测系统[D].合肥:中国科学技术大学,2017:28-34.
[20]SUN Ling,GUO Mao-hua,XU Na.On-orbit response variation of FY-3 MERSI reflective solar bands based on Dunhuang site calibration[J].Spectroscopy and Spectral Analysis,2012,32(7):1870-1877.孙凌,郭茂华,徐娜.基于敦煌场地定标的FY-3 MERSI反射太阳波段在轨响应变化分析[J].光谱学与光谱分析,2012,32(7):1870-1877.
[21]BIGGAR S F.In-flight methods for satellite sensor absolute radiometric calibration[D].Tucson:University of Arizona,1990:142-145.
[22]ZHANG Yu-xiang,ZHANG Guang-shun,HUANG Yi-bin.In-flight vicarious radiometric calibration for VIS-NIRchannels of FY-1Csatellite sensor at Dunhuang site[J].Acta Meteorologica Sinica,2002,60(6):740-747.张玉香,张广顺,黄意玢.FY-1C遥感器可见-近红外各通道在轨辐射定标[J].气象学报,2002,60(6):740-747.
[23]ZHANG Yu-xiang,QIU Kang-mu,HU Xiu-qing.Vicarious radiometric calibration of satellite FY-1Dsensors at visible and near infrared channels[J].Acta Meteorologica Sinica,2004,18(4):501-516.
[24]BIGGAR S F,SLATER P N,GELLMAN D I.Uncertainties in the in-flight calibration of sensors with reference to measured ground sites in the 0.4to 1.1μm range[J].Remote Sensing of Environment,1994,48:245-252.