| 利用TERRA/MODIS对FY-3A/VIRR热红外通道进行交叉定标 |
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| 引用本文： | 李宜秀 吴军 方勇华. 利用TERRA/MODIS对FY-3A/VIRR热红外通道进行交叉定标[J]. 大气与环境光学学报, 2016, 11(3): 204-210 |
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| 作者姓名： | 李宜秀 吴军 方勇华 |
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| 作者单位： | （中国科学院安徽光学精密机械研究所通用光学定标与表征技术重点实验室，安徽 合肥 230031） |
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| 摘 要： | 针对FY-3A/VIRR传感器定标精度有限，且场地定标机会有限的问题，介绍了利用高精度的TERRA/MODIS 31通道对FY-3A/VIRR 红外4通道进行绝对交叉定标的方法。选用2013年1、3、和9三个月的卫星数据进行了交叉定标计算，并对交叉定标结果进行的验证。结果表明，VIRR利用交叉定标系数计算的通道亮温与MODIS匹配点处的实测结果具有很好的一致性，绝大多数的亮温偏差在1 K以内。对不同月份交叉定标结果进行的验证表明，交叉定标系数具有普遍适用性。
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| 关 键 词： | 交叉定标 红外通道 像元匹配 FY-3A MODIS |
| 收稿时间： | 2015-04-16 |
| 修稿时间： | 2015-04-23 |
Cross-Calibration of FY-3A/VIRR Thermal Infrared Channel with TERRA/MODIS |
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| LI Yi-Xiu,WU Jun,FANG Yong-Hua. Cross-Calibration of FY-3A/VIRR Thermal Infrared Channel with TERRA/MODIS[J]. Journal of Atmospheric and Environmental Optics, 2016, 11(3): 204-210 |
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| Authors: | LI Yi-Xiu WU Jun FANG Yong-Hua |
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| Affiliation: | （AnHui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences,AnhuiHefei 230031 China） |
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| Abstract: | Considering the limited calibration accuracy of FY-3A/VIRR sensor, and limited opportunities for calibration, the cross-calibration method of infrared channel of VIRR with high-precision MODIS of the onboard polar-orbit satellite TERRA is introduced. The cross-calibration is implemented by using the satellite data in January, March and September of 2013. The results show that the brightness temperature of VIRR calculated by using cross-calibration coefficients is nearly equal to the observed value of MODIS, and the vast majority of brightness temperature bias is less than1 K. The validation results showed that cross-calibration coefficients has universality. |
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| Keywords: | cross-calibration infrared channels spectral matching FY-3A MODIS |
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