An Algorithm for Retrieving Land Surface Temperatures Using VIIRS Data in Combination with Multi-Sensors
文献类型: 外文期刊
第一作者: Xia, Lang
作者: Xia, Lang;Mao, Kebiao;Ma, Ying;Zhao, Fen;Qin, Zhihao;Jiang, Lipeng;Shen, Xinyi
作者机构:
关键词: land surface temperature;retrieval;MODIS;VIIRS
期刊名称:SENSORS ( 影响因子:3.576; 五年影响因子:3.735 )
ISSN: 1424-8220
年卷期: 2014 年 14 卷 11 期
页码:
收录情况: SCI
摘要: A practical algorithm was proposed to retrieve land surface temperature (LST) from Visible Infrared Imager Radiometer Suite (VIIRS) data in mid-latitude regions. The key parameter transmittance is generally computed from water vapor content, while water vapor channel is absent in VIIRS data. In order to overcome this shortcoming, the water vapor content was obtained from Moderate Resolution Imaging Spectroradiometer (MODIS) data in this study. The analyses on the estimation errors of vapor content and emissivity indicate that when the water vapor errors are within the range of +/- 0.5 g/cm(2), the mean retrieval error of the present algorithm is 0.634 K; while the land surface emissivity errors range from -0.005 to +0.005, the mean retrieval error is less than 1.0 K. Validation with the standard atmospheric simulation shows the average LST retrieval error for the twenty-three land types is 0.734 K, with a standard deviation value of 0.575 K. The comparison between the ground station LST data indicates the retrieval mean accuracy is -0.395 K, and the standard deviation value is 1.490 K in the regions with vegetation and water cover. Besides, the retrieval results of the test data have also been compared with the results measured by the National Oceanic and Atmospheric Administration (NOAA) VIIRS LST products, and the results indicate that 82.63% of the difference values are within the range of -1 to 1 K, and 17.37% of the difference values are within the range of +/- 2 to +/- 1 K. In a conclusion, with the advantages of multi-sensors taken fully exploited, more accurate results can be achieved in the retrieval of land surface temperature.
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