| 高光谱GIIRS中波通道的最优选择及其对云检测的影响 |
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| 引用本文： | 王根,邵立瑛,丁卫东,陈娇,刘倪,谢菲. 高光谱GIIRS中波通道的最优选择及其对云检测的影响[J]. 红外, 2021, 42(7): 36-42 |
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| 作者姓名： | 王根 邵立瑛 丁卫东 陈娇 刘倪 谢菲 |
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| 作者单位： | 安徽省气象台大气科学与卫星遥感安徽省重点实验室,安徽合肥230031;中亚大气科学研究中心,新疆乌鲁木齐830002;安徽省气象科学研究所,安徽合肥230031;安徽省气象台大气科学与卫星遥感安徽省重点实验室,安徽合肥230031 |
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| 基金项目： | 国家自然科学基金项目(41805080);中亚大气科学研究基金项目(CAAS202003);安徽省气象台自立项目(AHMO202007;AHMO202004) |
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| 摘 要： | 风云四号A星干涉式大气垂直探测仪(Geostationary Interferometric In-frared Sounder,GIIRS)中波通道的最优选择是有效变分同化此资料的关键技术之一,能减少冗余信息所引起的变分同化和反演的不适定性.将通用的熵减法(Entropy Reduction,ER)用于GIIRS通道...
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| 关 键 词： | 高光谱GIIRS 通道选择 云检测 熵减法 台风" 利奇马" |
| 收稿时间： | 2021-02-28 |
| 修稿时间： | 2021-03-20 |
Optimal Selection of Medium-Wave Channels in Hyperspectral GIIRS and Its Influence on Cloud Detection |
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| WANG Gen,SHAO Li-ying,DING Wei-dong,CHEN Jiao,LIU Ni and XIE Fei. Optimal Selection of Medium-Wave Channels in Hyperspectral GIIRS and Its Influence on Cloud Detection[J]. Infrared, 2021, 42(7): 36-42 |
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| Authors: | WANG Gen SHAO Li-ying DING Wei-dong CHEN Jiao LIU Ni XIE Fei |
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| Affiliation: | Anhui Meteorological Observatory,Anhui Meteorological Observatory,Anhui Meteorological Observatory,Anhui Meteorological Observatory,Anhui Meteorological Observatory,Anhui Meteorological Observatory |
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| Abstract: | The optimal selection of medium-wave channels in the geostationary interferometric infrared sounder (GIIRS) of FY-4A is one of the key technologies for effective variational assimilation of the data, which can reduce the ill-posed assimilation and inversion caused by redundant information. In this paper, the general entropy reduction method is applied to GIIRS channel optimization. In addition, since the observations of infrared sounders are easily affected by clouds, cloud detection is needed to obtain field points or cloud parameter information in the clear sky during the variational assimilation of GIIRS bright temperature data. In this paper, the minimum residual method is used to conduct cloud detection of GIIRS data. This method can not only determine whether there are clouds, but also obtain the information of effective cloud amount and cloud top pressure at the field-of-view. Since the detection accuracy is affected by the combination of different channels, the influence based on the data of Typhoon "Lekima (2019)" is further discussed in this paper. |
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