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1. 中国科学院 遥感应用研究所 北京,100101
2. 中国气象局 中国遥感卫星辐射测量和定标重点开放实验室 国家卫星气象中心 北京,100081
3. 中国科学院 上海技术物理研究所 上海,200083
收稿日期:2009-09-11,
修回日期:2009-11-17,
网络出版日期:2010-09-29,
纸质出版日期:2010-09-20
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胡秀清, 张里阳, 郑照军, 张 勇, 孙 凌, 丁 雷, 黄小仙. FY-3A中分辨率光谱成像仪热红外通道的多探元辐射定标[J]. 光学精密工程, 2010,18(9): 1972-1980
HU Xiu-qing, ZHANG Li-yang, ZHENG Zhao-jun, ZHANG Yong, SUN Ling, DING Lei, HUANG Xiao-xian. FY-3A multi-detector radiometric calibration for infrared band of medium resolution spectral imager[J]. 光学精密工程, 2010,18(9): 1972-1980
胡秀清, 张里阳, 郑照军, 张 勇, 孙 凌, 丁 雷, 黄小仙. FY-3A中分辨率光谱成像仪热红外通道的多探元辐射定标[J]. 光学精密工程, 2010,18(9): 1972-1980 DOI: 10.3788/OPE.20101809.1972.
HU Xiu-qing, ZHANG Li-yang, ZHENG Zhao-jun, ZHANG Yong, SUN Ling, DING Lei, HUANG Xiao-xian. FY-3A multi-detector radiometric calibration for infrared band of medium resolution spectral imager[J]. 光学精密工程, 2010,18(9): 1972-1980 DOI: 10.3788/OPE.20101809.1972.
FY-3A中分辨率光谱成像仪(MERSI)红外通道采取40探元跨轨并行扫描方式
针对其辐射定标要比传统单元探测器的辐射定标复杂的问题
研究了MERSI红外通道的多探元辐射定标方法。首先
基于星上黑体观测进行逐探元的辐射定标处理
消除探元辐射响应差异条纹;然后
利用各探元与基准探元光谱响应对不同温度黑体光谱辐亮度建立比值关系
基于其随着辐亮度呈非线性变化的关系
对逐探元定标后图像进行探元光谱差异的辐亮度归一化补偿
从辐射机理上最大限度地消除图像条纹
实现了多探元观测目标辐射信号的光谱响应差异归一化。为了验证MERSI红外通道辐射定标精度
文中还利用同时过星下点观测(SNO)交叉定标方法
将MERSI定标结果与美国Terra中分辨率成像光谱仪(MODIS)定标结果进行比对
结果显示
相对于后者
MERSI的红外通道亮温高1 K左右
认为这可能与两者的通道带宽不同有关。
As the FY-3A Medium Resolution Spectral Imager(MERSI) takes a cross-track scanning by 40 detectors in a thermal Infrared Window band
its radiometric calibration is more complicate than those of traditional single detectors. Therefore
this paper investigates a multi-detector radiometric calibration method for the MERSI. Firstly
the operational calibration algorithm for the IR band of MERSI based on onboard blackbody detector-by-detector is proposed to eliminate the radiometric response difference strips.Then
based on the radiance ratios of each detector to reference detector at different blackbody temperatures
this algorithm conducts the normalization processing for SRF-different bias (spectral normalization)to alleviate the image strips by radiometric mechanism. To verify the accuracy of MERSI calibration
the inter-calibration between MERSI and Moderate-resolution Imaging Spectroradiometer(MODIS) is performed by using Simultaneous Nadir Observation (SNO).Experiments show that the difference of their brightness temperatures is about 1.0 K
which may come from their different bandwidths.
杨军,董超华,卢乃锰,等. 中国新一代极轨气象卫星风云三号
. 气象学报,2009,67(4),501-509. YANG J, DONG CH H, LU N M, et al.. FY-3A: The new generation polar-orbiting meteorological satellite of china
. Acta Meteorological Sinica, 2009,67(4):501-509.(in Chinese)
丁雷. FY-3卫星中分辨率光谱成像仪正样设计报告 . 上海:中国科学院上海技术物理研究所,2005. DING L. Flight Model Design of FY-3A MEdium Resolution Spectral Imager (MERSI) . Shanghai: Shanghai Institute of Technical Physics of Chinese Academy of Sciences,2005.(in Chinese)
丁雷. FY-3卫星中分辨率光谱成像仪正样(Z01-2)研制总结报告 . 上海:中国科学院上海技术物理研究所,2007. DING L. Flight Model (Z01-2) Development Review of FY-3A MEdium Resolution Spectral Imager (MERSI) . Shanghai: Shanghai Institute of Technical Physics of Chinese Academy of Sciences,2007.(in Chinese)
GUENTHER B W. KNIGHT B S. MODIS calibration: A brief review of the strategy for the at-Launch calibration approach
. J. Atmos. Ocean. Tech., 1996,13,274-285.
XIONG J,TOLLER G,CHIANG V, et al.. MODIS level 1B Algorithm Theoretical Basis Document, MODIS Characterization Support Team
. 2005.
GUENTHER B,GODDEN G D,XIONG X, et al.. Pre-launch algorithm and data format for the Level 1 calibration products for the EOS AM-1 Moderate Resolution Imaging Spectroradiometer (MODIS)
. IEEE Trans. Geosci. Remote Sens., 1998,36,1142-1151.
XIONG X K, CHIANG B GUENTHER, et al.. MODIS thermal emissive bands calibration algorithm and on-orbit performance
. SPIE, 2002a,4891:392-401.
XIONG X K. CHIANG, GUENTHER B, et al.. MODIS thermal emissive bands calibration algorithm and on-orbit performance
.SPIE, 2002b:4891,392-401.
朱小祥,范天锡,黄签. 《神舟三号》成像光谱仪图像条纹消除的一种有效方法
. 红外与毫米波学报,2004,23(6):451-454. ZHU X X , FAN T X, HUANG Q. Method to destripe imaging spectroradiometer data Of SZ-3
. J . Inf rared Millim. Waves.,2004,23(6):451-454.
杨忠东 ,张文建 ,李俊,等. 应用小波收缩方法剔除热红外波段数据条带噪声
. 遥感学报,2004,8(1):23-30. YANG ZH D, ZHANG W J, LI J,et al.. Destriping for MODIS inf rared band data via wavelet shrinkage
. Journal of Remote Sensing,2004,8(1):23-30. (In Chinese)
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