Hyperion高光谱遥感器的在轨自动化定标
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摘要
利用布设在敦煌辐射校正场的自动化观测设备,对Hyperion高光谱遥感器开展定标试验;详细描述自动化定标的原理和方法,明确定标流程;针对高光谱遥感器的特点建立参考反射率数据库,以解决通道反射率与参考反射率光谱形状不匹配的问题;在2016年10月至2017年4月期间,对Hyperion高光谱遥感器共完成4次有效的自动化定标试验,并将试验结果与Hyperion高光谱遥感器观测的表观辐亮度进行比对验证。结果表明:在420～1044nm光谱范围内,场地自动化定标得到的表观辐亮度与卫星观测的表观辐亮度的相对偏差小于5%,标准方差小于2.3%;场地自动化定标结果与高光谱星上观测结果具有较高的一致性和稳定性。所提方法可以应用于高光谱遥感器的高频次在轨辐射定标。
In this study,the calibration tests were conducted on the Hyperion hyperspectral remote sensor using the automated observation equipment at the Dunhuang radiometric calibration site.This paper details the principle and method of automated calibration and specifies the applied calibration process.A reference reflectance database was established to solve the problem of mismatch between the channel reflectance in the hyperspectral remote sensor and the spectral shape of the reference reflectance.The results of the four effective automated calibration tests performed on Hyperion from October 2016 to April 2017 were compared with the apparent radiance observed by Hyperion.The results show that the relative deviation between the apparent radiance obtained from the site-automated calibration and that from the satellite observation is less than 5% with a standard deviation of less than 2.3% within the 420-1044 nm spectral range.The site-automated calibration results are found to be highly consistent and stable with respect to the hyperspectral satellite observations,indicating that the proposed method can be applied to the highfrequency on-orbit radiometric calibration of hyperspectral remote sensors.
In this study,the calibration tests were conducted on the Hyperion hyperspectral remote sensor using the automated observation equipment at the Dunhuang radiometric calibration site.This paper details the principle and method of automated calibration and specifies the applied calibration process.A reference reflectance database was established to solve the problem of mismatch between the channel reflectance in the hyperspectral remote sensor and the spectral shape of the reference reflectance.The results of the four effective automated calibration tests performed on Hyperion from October 2016 to April 2017 were compared with the apparent radiance observed by Hyperion.The results show that the relative deviation between the apparent radiance obtained from the site-automated calibration and that from the satellite observation is less than 5% with a standard deviation of less than 2.3% within the 420-1044 nm spectral range.The site-automated calibration results are found to be highly consistent and stable with respect to the hyperspectral satellite observations,indicating that the proposed method can be applied to the highfrequency on-orbit radiometric calibration of hyperspectral remote sensors.
引文
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[16]LüJ Y,He M Y,Chen L,et al.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,等.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.
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[18]Wang L,Hu X Q,Chen L.FY-3C/MERSI caliration for solar band using multi-reflectance stable targets[J].Optics and Precision Engineering,2015,23(7):1911-1920.
[19]Wei W,Zhang Y N,Zhang M,et al.Multisite highfrequency 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.
[20]Wei W,Song S,Sun Y G,et al.Development and application of automated vicarious calibration system[J].Chinese Optics Letters,2017,15(10):100101.
[21]Qiu G G.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的研制与定标应用[D].合肥:中国科学技术大学,2017.
[22]Tan B X,Li Z Y,Chen E X,et al.Preprocessing of EO-1 hyperion hyperspectral data[J].Remote Sensing Information,2005,20(6):36-41..谭炳香,李增元,陈尔学,等.EO-1 Hyperion高光谱数据的预处理[J].遥感信息,2005,20(6):36-41.
[2]Chen H Y.Spectral and radiometric calibration of hyperspectral sensor in visible-near infrared band[D].Hefei:University of Chinese Academy of Sciences,2010:1-4.陈洪耀.可见近红外波段高光谱遥感器光谱与辐射定标技术研究[D].合肥:中国科学院大学,2010:1-4.
[3]Qiu Y,Yu Y,Guo A,et al.Technological process of pre-processing for HJ-1A HSI data[J].Forest Engineering,2015,31(4):83-86,91.邱玥,于颖,郭安,等.HJ-1A星HSI数据预处理流程研究[J].森林工程,2015,31(4):83-86,91.
[4]Sun Y Z,Jiang G W,Li Y D,et al.Hyper-spectral observation satellite and it′s application prospects[J].Aerospace Shanghai,2017,34(3):1-13.孙允珠,蒋光伟,李云端,等.高光谱观测卫星及应用前景[J].上海航天,2017,34(3):1-13.
[5]McCorkel J,Thome K,Ong L.Vicarious calibration of EO-1 hyperion[J].IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing,2013,6(2):400-407.
[6]Green R O,Pavri B E,Chrien T G.On-orbit radiometric and spectral calibration characteristics of eo-1hyperion derived with an underflight of aviris and in situ measurements at salar de arizaro,argentina[J].IEEE Transactions on Geoscience and Remote Sensing,2003,41(6):1194-1203.
[7]Biggar S F,Thome K J,Wisniewski W.Vicarious radiometric calibration of eo-1sensors by reference to high-reflectance ground targets[J].IEEETransactions on Geoscience and Remote Sensing,2003,41(6):1174-1179.
[8]Gao H L,Gu X F,Yu T,et al.HJ1A/HSIradiometric calibration and spectrum response function sensitivity analysis[J].Spectroscopy and Spectral Analysis,2010,30(11):3149-3155.高海亮,顾行发,余涛,等.环境卫星HJlA超光谱成像仪在轨辐射定标及光谱响应函数敏感性分析[J].光谱学与光谱分析,2010,30(11):3149-3155.
[9]Li X,Zheng X B,Yin Y P.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.
[10]Czapla-Myers J S.Automated ground-based methodology in support of vicarious calibration[D].Tucson:The University of Arizona,2006:41-43,54-57.
[11]Czapla-Myers J S,Thome K J,Leisso N P.Radiometric calibration of earth-observing sensors using an automated test site at Railroad Valley,Nevada[J].Canadian Journal of Remote Sensing,2010,36(5):474-487.
[12]Wang N,Li C R,Ma L L,et al.Ground-based automated radiometric calibration system in Baotou site,China[J].Proceedings of SPIE,2017,10527:104271J.
[13]Schmechtig C,Santer R P,Roger J C,et al.Automatic ground-based station for vicarious calibration[J].Proceedings of SPIE,1997:3221:309-318.
[14]Kerola D X,Bruegge C J,Gross H N,et al.Onorbit calibration of the EO-1hyperion and advanced land imager(ALI)sensors using the LEDspectrometer(LSpec)automated facility[J].IEEETransactions on Geoscience and Remote Sensing,2009,47(4):1244-1255.
[15]Qiu G G,Li X,Wei W,et al.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.
[16]LüJ Y,He M Y,Chen L,et al.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,等.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.
[17]Strahler A H,Muller J-P.MODIS BRDF/albedo product:algorithm theoretical basis document version5.0[Z].1999:5-16.
[18]Wang L,Hu X Q,Chen L.FY-3C/MERSI caliration for solar band using multi-reflectance stable targets[J].Optics and Precision Engineering,2015,23(7):1911-1920.
[19]Wei W,Zhang Y N,Zhang M,et al.Multisite highfrequency 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.
[20]Wei W,Song S,Sun Y G,et al.Development and application of automated vicarious calibration system[J].Chinese Optics Letters,2017,15(10):100101.
[21]Qiu G G.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的研制与定标应用[D].合肥:中国科学技术大学,2017.
[22]Tan B X,Li Z Y,Chen E X,et al.Preprocessing of EO-1 hyperion hyperspectral data[J].Remote Sensing Information,2005,20(6):36-41..谭炳香,李增元,陈尔学,等.EO-1 Hyperion高光谱数据的预处理[J].遥感信息,2005,20(6):36-41.