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Generation of land surface temperature with high spatial and temporal resolution based on FSDAF method |
Min YANG1,2,3( ), Guijun YANG2,3,4( ), Xiaoning CHEN5, Yongfeng ZHANG6, Jingni YOU5 |
1. Shaanxi Earthquake Agency, Xi’an 710068, China; 2. National Engineering Research Center for Information Technology in Agriculture, Beijing 100097, China 3. Key Laboratory of Agri-informatics, Ministry of Agriculture, Beijing 100097, China 4. Beijing Engineering Research Center of Agricultural Internet of Things, Beijing 100097, China 5. College of Geomatics, Xi’an University of Science and Technology, Xi’an 710054, China; 6. Xi’an Zhongtianweidi Surveying & Mapping Technology Co., Ltd, Xi’an 710065, China; |
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Abstract The application of the high spatio-temporal resolution data possesses very extensive foreground. Consequently, based on a flexible spatio-temporal data fusion(FSDAF)method and using MODIS and ASTER data,the authors generate the land surface temperature(LST) with high spatial and temporal resolution. FSDAF is a method based on spectral unmixing and thin plate spline interpolation function. Compared with the existing spatio-temporal data fusion method, its advantages lie in less input data,suitableness for heterogeneous surface and capability of predicting the gradient of land cover types and so on. The fusion results were verified by using the ASTER temperature products(7 days) and the surface radiation infrared temperature data(4 days)of the automatic weather station(AWS) sites. The results show that the LST images generated by the data fusion method based on FSDAF have higher clarity, the correlation coefficient of the fusion images and the ASTER LST products is higher than 0.91(September 28) , the room mean square error (RMSE) is less than 2.44 k(September 19), the mean absolute error (MAE) is less than 1.84 k (September 19)and the correlation coefficient of the fusion images and the AWS LST data R2 is higher than 0.64(August 18).
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Keywords
spatial and temporal fusion
data fusion
remote sensing
land surface temperature(LST)
automatic weather station(AWS)
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Issue Date: 08 February 2018
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