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地球科学进展  2016, Vol. 31 Issue (2): 171-179    DOI: 10.11867/j.issn.1001-8166.2016.02.0171
研究论文     
中国遥感卫星辐射校正场热红外通道在轨场地辐射定标方法精度评估
张 勇,戎志国,闵 敏
中国遥感卫星辐射测量与定标重点开放实验室,国家卫星气象中心,北京 100081
Accuracy Evaluations of the CRCS In-orbit Field Radiometric Calibration Methods for Thermal Infrared Channels
Zhang Yong, Rong Zhiguo, Min Min
Key Laboratory of Radiometric Calibration and Validation for Environmental Satellites, China Meteorological Administration (LRCVES/CMA), Beijing 100081, China
 全文: PDF(8828 KB)   HTML
摘要: 基于中国遥感卫星辐射校正场对在轨运行的遥感卫星热红外通道进行在轨绝对辐射定标,利用TERRA/AQUA MODIS卫星观测数据,对中国遥感卫星辐射校正场热红外通道在轨场地辐射定标方法进行精度评估与分析。将MODIS观测的入瞳亮温与外场实测数据通过辐射传输模式模拟到卫星入瞳的亮温进行比较,结果表明对热红外窗区通道的定标精度优于1.0 K(@300 K)。目前应用于我国在轨风云气象卫星热红外通道的中国遥感卫星辐射校正场绝对辐射定标方法本身具有很好的定标精度:对10.5~11.5 μm通道,误差在0.747 K以内;对11.5~12.5 μm通道,误差在0.851 K以内。
关键词: 辐射定标精度评估中国遥感卫星辐射校正场发射率光谱热红外遥感    
Abstract: In order to achieve the in-orbit absolute radiometric calibration of the operational meteorological satellites’ thermal infrared channels, China Radiometric Calibration Sites (CRCS) were established and the accuracy of the CRCS in-orbit field absolute radiometric calibration methods (FCM) for thermal infrared channels (TIR) was evaluated and analyzed based on TERRA/AQUA MODIS observations. Comparisons between the MODIS at pupil brightness temperatures (BTs) and the simulated BTs at the top of atmosphere using radiative transfer model (RTM) based on field measurements showed that the accuracy of the current in-orbit field absolute radiometric calibration methods was better than 1.0K (@ 300K) in thermal infrared channels. Therefore, the current CRCS field calibration method for TIR channels applied to Chinese meteorological satellites was with favorable calibration accuracy: for 10.5~11.5 μm channel was better than 0.747 K and for 11.5~12.5 μm channel was better than 0.851 K.
Key words: Radiometric calibration    Accuracy evaluation.    China radiometric calibration sites    Thermal infrared remote sensing    Emissivity spectrum
收稿日期: 2015-11-10 出版日期: 2016-02-10
:  P407  
基金资助: 国家自然科学基金项目“自旋稳定静止气象卫星星上黑体辐射定标修正模型研究”(编号:41171275) 和“热红外遥感传感器辐射定标的模型融合与综合方法研究”(编号:40701118)资助.
作者简介: 张勇(1977-),男,陕西镇巴人,副研究员,主要从事定量遥感、遥感传感器辐射定标和热红外遥感的理论和应用研究.E-mail:zhangyong@cma.gov.cn
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引用本文:

张 勇, 戎志国, 闵 敏. 中国遥感卫星辐射校正场热红外通道在轨场地辐射定标方法精度评估[J]. 地球科学进展, 2016, 31(2): 171-179.

Zhang Yong, Rong Zhiguo, Min Min. Accuracy Evaluations of the CRCS In-orbit Field Radiometric Calibration Methods for Thermal Infrared Channels. Advances in Earth Science, 2016, 31(2): 171-179.

链接本文:

http://www.adearth.ac.cn/CN/10.11867/j.issn.1001-8166.2016.02.0171        http://www.adearth.ac.cn/CN/Y2016/V31/I2/171

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