中红外双通道夜间数据地表温度反演方法
地表温度反演是红外定量遥感的核心内容之一.与热红外(8~14μm)数据相比,中红外(3~5μm)波谱区大气透过率更高、对发射率的敏感性更低,在温度反演方面具有独特的优势.引入热红外地表温度反演思路,发展了仅利用夜间中红外双通道数据的地表温度反演算法,分析了宽通道组合(3~4 μm和4~5 μm)和窄通道组合(3929~3.989 μm和4.020~4.080μm)模式下的温度反演精度以及模型对噪声和发射率的敏感性.结果表明,宽、窄两种通道组合模型的温度反演精度分别为~0.5 K和~0.3 K;噪声等效温差和地表发射率误差对窄通道组合模型的影响更大....
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Published in | 红外与毫米波学报 Vol. 33; no. 3; pp. 303 - 310 |
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Main Author | |
Format | Journal Article |
Language | Chinese |
Published |
中国科学院大学,北京100049%中国科学院光电研究院定量遥感信息技术重点实验室,北京,100094
2014
中国科学院光电研究院定量遥感信息技术重点实验室,北京100094 |
Subjects | |
Online Access | Get full text |
ISSN | 1001-9014 |
DOI | 10.3724/SP.J.1010.2014.00303 |
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Summary: | 地表温度反演是红外定量遥感的核心内容之一.与热红外(8~14μm)数据相比,中红外(3~5μm)波谱区大气透过率更高、对发射率的敏感性更低,在温度反演方面具有独特的优势.引入热红外地表温度反演思路,发展了仅利用夜间中红外双通道数据的地表温度反演算法,分析了宽通道组合(3~4 μm和4~5 μm)和窄通道组合(3929~3.989 μm和4.020~4.080μm)模式下的温度反演精度以及模型对噪声和发射率的敏感性.结果表明,宽、窄两种通道组合模型的温度反演精度分别为~0.5 K和~0.3 K;噪声等效温差和地表发射率误差对窄通道组合模型的影响更大. |
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Bibliography: | mid-infrared night-time data, land surface temperature, land surface emissivity 31-1577/TN ZHAO En-Yu, QIAN Yong-Gang , WANG Ning , MA Ling-Ling, TANG Ling-Li ( 1. Key laboratory of Quantitative Remote Sensing Information Technology, Academy of Opto-Electronics, Chinese Academy of Sciences, Beijing 100094, China; 2. University of Chinese Academy of Sciences, Beijing 100049, China) Retrieval of land surface temperature (LST) is one of the key issues in mid- and thermal-infrared quantitative remote sensing. Compared with thermal-infrared (8~14μm) channel, mid-infrared (3~5μm) channel with the advantages, such as more transparent of atmospheric window and less sensitive to the surface emissivity, might be used to retrieve the LST. A two-channel LST retrieval algorithm, which only uses the night-time data of two mid-infrared channels and introduces the experience of thermal infrared LST retrieval method, has been proposed in this paper. The retrieval accuracies of two channel-combination models, i.e., narrow-channel |
ISSN: | 1001-9014 |
DOI: | 10.3724/SP.J.1010.2014.00303 |