A directional thermal radiance model for row crop canopy impact of sensor footprint
Received:January 10, 2018  Revised:February 14, 2018  download
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Author NameAffiliationE-mail
LI Kun Academy of Opto-Electronics, Chinese Academy of Sciences 1476783428@qq.com 
QIAN Yong-Gang Academy of Opto-Electronics, Chinese Academy of Sciences qianyg@aoe.ac.cn 
WANG Ning Academy of Opto-Electronics, Chinese Academy of Sciences  
MA Ling-Ling Academy of Opto-Electronics, Chinese Academy of Sciences  
QIU Shi Academy of Opto-Electronics, Chinese Academy of Sciences  
LI Chuan-Rong Academy of Opto-Electronics, Chinese Academy of Sciences  
TANG Ling-Li Academy of Opto-Electronics, Chinese Academy of Sciences  
CHEN Zhi-Ming   
WANG Guo-Zhu   
Abstract:The direction of thermal radiance is one of the key problems in thermal infrared remote sensing retrieval and product validation. Aiming at row crop, a directional thermal radiance model is built by considering the sunlit/shaded leaf, sunlit/shaded soil, multiple scattering and field of view. The accuracy and sensitivity of the model are discussed and the results show that the model can not only explain the row crop structure and hot spot effect well, but also be suitable for simulating the thermal radiance of continuous canopy. Compared with the FRA97 and the FovMod model, the directional distributions of directional brightness temperature are in good agreement. The root mean square error is 0.18 K and 0.36 K respectively.
keywords:sensor footprint, row crop, thermal radiance, directionality
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Copyright:《Journal of Infrared And Millimeter Waves》