红外与毫米波学报, 2009, 28 (3): 188, 网络出版: 2010-12-13   

利用大洋浮标数据和NCEP再分析资料对FY-2C红外分裂窗通道的绝对辐射定标

ABSOLUTE RADIOMETRIC CALIBRATION OF FY-2C INFRARED SPLIT-WINDOW CHANNELS BY USING SEA BUOY DATA AND NCEP REANALYSIS DATA
作者单位
1 国家卫星气象中心 中国遥感卫星辐射测量与定标重点开放实验室,北京 100081
2 中国科学院遥感应用研究所 遥感科学国家重点实验室,北京 100101
摘要
介绍利用大洋浮标数据和NCEP再分析资料对FY-2C红外分裂窗通道进行在轨绝对辐射定标的方法,并选 择了2006年10个时次的卫星数据进行辐射定标试验.将利用这种方法获得的定标结果与FY-2C卫星数据产品中 提供的定标查找表进行比较分析,结果表明两套不同的定标系数反演的大气层顶(TOA)亮度温度的主要差别集中 在云顶、冰雪覆盖区域等低温像元;而在常温区的陆表和海表像元定标结果差别较小,反演的TOA亮温差在2K左 右.提出的替代定标方法可以极大地提高定标频次,为实现FY-2C红外分裂窗通道的实时绝对辐射定标提供了重 要的方法基础.
Abstract
A method of absolute radiometric calibration for FY-2C infrared split-window channels by using sea buoy data and NCEP reanalysis data was introduced. In 2006, ten times remote sensing data were selected to obtain the radiometric calibration coefficients. The calibration results obtained from this new method were compared with the product brightness temperature provided by FY-2C. The results show that the biggest differences of the brightness temperatures at the top of atmosphere(TOA) obtained from these two suits of calibration coefficients are mainly located at the low surface temperature pixels, such as the top of clouds and snow covered areas, however, the calibration differences are small in the normal temperature pixels of land and sea surface areas, and the differences of TOA brightness temperature are mainly around 2K. This new vicarious calibration method can increase the calibration frequency and provide a methodological foundation for the real-time radiometric calibration of FY-2C infrared split-window channels.

张勇, 李元, 戎志国, 胡秀清, 许健民. 利用大洋浮标数据和NCEP再分析资料对FY-2C红外分裂窗通道的绝对辐射定标[J]. 红外与毫米波学报, 2009, 28(3): 188. ZHANG Yong, LI Yuan, RONG Zhi-Guo, HU Xiu-Qing, XU Jian-Min. ABSOLUTE RADIOMETRIC CALIBRATION OF FY-2C INFRARED SPLIT-WINDOW CHANNELS BY USING SEA BUOY DATA AND NCEP REANALYSIS DATA[J]. Journal of Infrared and Millimeter Waves, 2009, 28(3): 188.

本文已被 4 篇论文引用
被引统计数据来源于中国光学期刊网
引用该论文: TXT   |   EndNote

相关论文

加载中...

关于本站 Cookie 的使用提示

中国光学期刊网使用基于 cookie 的技术来更好地为您提供各项服务,点击此处了解我们的隐私策略。 如您需继续使用本网站,请您授权我们使用本地 cookie 来保存部分信息。
全站搜索
您最值得信赖的光电行业旗舰网络服务平台!