A Monte Carlo reflectance simulation of rice canopy based on digital 3-D structure 

作成者 Kushida, Keiji, Yoshino, Kunihiko, Yamaji, Eiji
日本十進分類法 (NDC) 417
内容 研究概要:NIR bidirectional reflectance distribution of thirteen kinds of rice canopy is simulated using the 3-D Monte Carlo method and measured in an experimental field. The simulation is carried out under two different field conditions. One is similar to the condition of the experimental field (condition A) and the other is the wide spread field condition under the parallel solar beam (condition B). The framework of the simulation model is 1cm×1cm×1cm sized rectangular solid cell. Each cell has an information of leaf area, inclination, and direction which is calculated using a 3-D digital stereo measurement method. Other than the structural information, the sensitivity of individual leaf reflectance is accounted. The sensitivity is decided by measuring some kinds of individual leaf reflectance. From the measurement, NIR reflectance and transmittance of rice leaves has low coefficient of variation. The simulated bidirectional reflectance under condition A fitted the measured one relatively well. As the result of the simulation, the ratio of the reflectance factors from wide spread field to different view zenith angles is suggested to give average inclination of rice canopy.
コンテンツの種類 研究報告書 Research Paper
DCMI資源タイプ text
掲載誌情報 Proceedings of the international symposium on Vegetation Monitoring page.170-177 (1995)
言語 英語

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