A Temporally Integrated Inversion Method for Estimating Leaf Area Index From MODIS Data
A Temporally Integrated Inversion Method for Estimating Leaf Area Index From MODIS Data
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一种利用MODIS数据估算叶面积指数的时间积分反演方法
DOI:
10.1109/tgrs.2009.2015656
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发表时间:
2009-04
期刊:
影响因子:
--
通讯作者:
Song Jinlin
中科院分区:
文献类型:
--
作者:
Wang Jindi;Liang Shunlin;Wu Xiyan;Xiao Zhiqiang;Song Jinlin
Multiple leaf area index (LAI) products have been generated from remote-sensing data. Among them, the Moderate-Resolution Imaging Spectroradiometer (MODIS) LAI product (MOD15A2) is now routinely derived from data acquired by MODIS sensors onboard Terra and Aqua satellite platforms. However, the MODIS LAI product is not spatially and temporally continuous and is inaccurate in many areas for some vegetation types. In this paper, a new algorithm is developed to estimate LAI from time-series MODIS reflectance data (MOD09A1). A radiative-transfer model is coupled with a double-logistic LAI temporal-profile model, and the shuffled complex evolution optimization method, developed at the University of Arizona, is used to estimate the parameters of the coupled model from the temporal signature in a given time window. Preliminary analysis using MODIS surface-reflectance data at flux sites was performed to validate this method. The results show that the new algorithm is able to construct a temporally continuous LAI product efficiently, and the accuracy has been significantly improved over the MODIS LAI product as compared to field-measured LAI data.
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DOI:
10.1109/36.263779
发表时间:
1993-09
期刊:
IEEE Trans. Geosci. Remote. Sens.
影响因子:
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DOI:
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发表时间:
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影响因子:
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DOI:
10.1109/tgrs.2006.872089
发表时间:
2006-08-01
影响因子:
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