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Remote Sensing Technology and Application  2014, Vol. 29 Issue (4): 531-538    DOI: doi:10.11873/j.issn.1004-0323.2014.4.0531
    
Land Surface Temperature Retrieval from FY3A/MERSI
Hu Juyang,Tang Shihao,Dong Lixin
(National Satellite Meteorological Center,Beijing 100081,China)
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Abstract  

Medium Resolution Spectral Imager (MERSI) is an important sensor carried by two on\|orbit Chinese polar-orbiting meteorological satellite.It enables images of the Earth with high spatial resolution and high temporal resolution.And its thermal infrared data can be used to retrieval high quality land surface temperature.In this paper,single\|channel method is developed by Jimёnez-Mu oz and Sobrino is improved in atmospheric parameter estimation and view angle correction,to more fit for thermal infrared channel spectral of FY3A/MERSI,so as to retrieval more accuracy and smooth LST.The improved algorithm is validated by simulation using MODerate Resolution Atmospheric TRANsmission (MODTRAN).The average error of LSTs at all view zenith angles is -0.6±2.2 K.The result also shows that introduction of view zenith angle factor fitting atmospheric parameters significantly improve the precision of LST.Finally,LSTs retrieved from FY3A/MERSI are compared with LSTs measured in Dunhuang Gobi site and MODIS LST products.The validation indicates MERSI LST is accurate in spatial distribution,and it has high precision.Average MERSI LST error is 1.74 K,and root mean square deviations are lower than 1.9 K relative to LST measured in site.Besides,LST difference between MERSI and MODIS in study area is 2.6307 K.Though its accuracy would be affected by the error of cloud detection and calibration of thermal infrared channel,LST retrieved from MERSI still has wide prospects for application in the related research and business.

Key words:  MERSI      Land surface temperature      Single band      View zenith angle     
Received:  23 April 2013      Published:  19 September 2014
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Hu Juyang
Tang Shihao
Dong Lixin

Cite this article: 

Hu Juyang,Tang Shihao,Dong Lixin. Land Surface Temperature Retrieval from FY3A/MERSI. Remote Sensing Technology and Application, 2014, 29(4): 531-538.

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http://www.rsta.ac.cn/EN/doi:10.11873/j.issn.1004-0323.2014.4.0531     OR     http://www.rsta.ac.cn/EN/Y2014/V29/I4/531

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