Assimilation of Remote Sensing and Crop Model for LAI Estimation Based on Ensemble Kaiman Filter

Agricultural Sciences in China Pub Date : 2011-10-01 Epub Date: 2011-10-21 DOI:10.1016/S1671-2927(11)60156-9
LI Rui , LI Cun-jun , DONG Ying-ying , LIU Feng , WANG Ji-hua , YANG Xiao-dong , PAN Yu-chun
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引用次数: 34

Abstract

Data assimilation in agricultural remote sensing research is of great significance to integrate with remote sensing observations and model simulations for parameters estimation. The present investigation not only designed and realized the Ensemble Kaiman Filtering algorithm (EnKF) assimilation by combing the crop growth model (CERES-Wheat) with remote sensing data, but also optimized and updated the key parameters (LAI) of winter wheat by using remote sensing data. Results showed that the assimilation LAI and the observation ones agreed with each other, and the R2 reached 0.8315. So assimilation remote sensing and crop model could provide reference data for the agricultural production.

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基于集成Kaiman滤波的遥感与作物模型同化LAI估算
摘要农业遥感研究中的数据同化对于与遥感观测和模式模拟相结合进行参数估计具有重要意义。本研究不仅结合作物生长模型(CERES-Wheat)与遥感数据设计并实现了集成开曼滤波(Ensemble Kaiman Filtering, EnKF)同化,还利用遥感数据对冬小麦关键参数(LAI)进行了优化更新。结果表明,同化LAI与观测值基本一致,R2为0.8315。因此,同化遥感和作物模型可以为农业生产提供参考数据。
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Agricultural Sciences in China
Agricultural Sciences in China AGRICULTURE, MULTIDISCIPLINARY-
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