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Remote Sens. 2014, 6(11), 11494-11517; doi:10.3390/rs61111494

Evaluation of MODIS LST Products Using Longwave Radiation Ground Measurements in the Northern Arid Region of China

Heihe Remote Sensing Experimental Research Station, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, 320 Donggang West Road, Lanzhou 730000, China
University of Chinese Academy of Sciences, Beijing 100049, China
Harbin Institute of Technology, 92 West Dazhi Street, Nan Gang District, Harbin 150001, China
Author to whom correspondence should be addressed.
Received: 23 June 2014 / Revised: 3 November 2014 / Accepted: 7 November 2014 / Published: 19 November 2014
(This article belongs to the Special Issue Recent Advances in Thermal Infrared Remote Sensing)
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This study presents preliminary results of the validation of the Moderate Resolution Imaging Spectroradiometer (MODIS) daily LST products (MOD/MYD11A1, Version 5) using longwave radiation ground measurements obtained at 12 stations in the North Arid and Semi-Arid Area Cooperative Experimental Observation Integrated Research program. In this evaluation process, the broadband emissivity at each station was obtained from the ASTER Spectral Library or estimated from the MODIS narrowband emissivity Collection 5. A comparison of the validation results based on those two methods shows that no significant differences occur in the short-term validation, and a sensitivity analysis of the broadband emissivity demonstrates that it has a limited effect on the evaluation results. In general, the results at the 12 stations indicate that the LST products have a lower accuracy in China’s arid and semi-arid areas than in other areas, with a mean absolute error of 2–3 K. Compared with the temporal mismatch, the spatial mismatch has a stronger effect on the validation results in this study, and the stations with homogeneous land cover have more comparable MODIS LST accuracies. Comparisons between the stations indicate that the spatial mismatch can increase the influence of the temporal mismatch. View Full-Text
Keywords: validation; land surface temperature products (LSTs); MODIS; longwave radiation; remote sensing validation; land surface temperature products (LSTs); MODIS; longwave radiation; remote sensing

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Yu, W.; Ma, M.; Wang, X.; Geng, L.; Tan, J.; Shi, J. Evaluation of MODIS LST Products Using Longwave Radiation Ground Measurements in the Northern Arid Region of China. Remote Sens. 2014, 6, 11494-11517.

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