一种顾及观测视场的行播作物热辐射方向性模型
Received:January 10, 2018  Revised:February 14, 2018  点此下载全文
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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  
基金项目:国家高技术研究发展计划(863计划),国家重点研发专项,中科院先导项目,青年创新促进会
中文摘要:热辐射方向性是热红外遥感反演和产品真实性检验中的关键问题之一。本文针对行播作物,构建了一个综合考虑光照植被/阴影植被、光照土壤/阴影土壤、植被-土壤多次散射和观测视场多影响因素的行播作物热辐射方向性模型,并详细分析模型精度以及模型对LAI、冠层结构等参数的敏感性。结果表明,本文模型不仅能够很好体现出行播结构热辐射特性和热点效应,而且适用于连续作物热辐射特性模拟;与现有FRA97模型和FovMod模型对比一致性良好,均方根误差分别为0.18 K和0.36 K。
中文关键词:观测视场  行播作物  热辐射  方向性
 
A directional thermal radiance model for row crop canopy impact of sensor footprint
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》