数字农科院2.0

Retrieval Of Surface Temperature And Emissivity From Ground-Based Time-Series Thermal Infrared Data

文献类型： 外文期刊

作者： Qian, YG; Wang, N; Li, K; Wu, H; Duan, SB; Liu, YK; Ma, LL; Gao, CX; Qiu, S; Tang, LL; Li, CR

作者机构：

关键词： Land surface temperature (LST); emissivity; time series; thermal infrared data

期刊名称： IEEE JOURNAL OF SELECTED TOPICS IN APPLIED EARTH OBSERVATIONS AND REMOTE SENSING

ISSN： 1939-1404

年卷期： 2020 年 13 卷

页码：

收录情况： JCR（2021版） ; EI（2021版）

摘要： This article addressed the simultaneous retrieval of land surface temperature (LST) and emissivity (LST&E) from the time-series thermal infrared data. On the basis of the assumption that the time-series LSTs can be described by a piecewise linear function, a new method has been proposed to simultaneously retrieve LST&E from atmospherically corrected time-series thermal infrared data using LST linear constraint. A detailed analysis has been performed against various errors, including error introduced by the method assumption, instrument noise, initial emissivity, atmospheric downwelling radiance error, etc. The proposed method from the simulated data is more immune to noise than the existing methods. Even with a noise equivalent delta temperature of 0.5 K, the root-mean-square error of LST is observed to be only 0.13 K, and that of the land surface emissivity (LSE) is 1.8E-3. In addition, our proposed method is simple and efficient and does not encounter the problem of singular values unlike the existing methods. To validate the proposed method, a field experiment from June to September 2017 was conducted for sand target in Baotou site, China. The results show that the samples have an accuracy of LST within 0.87 K and that the mean values of LSE are accurate to 0.01.

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