NDLI: A Temporally Integrated Inversion Method for Estimating Leaf Area Index From MODIS Data

Content Provider	IEEE Xplore Digital Library
Author	Zhiqiang Xiao Shunlin Liang Jindi Wang Jinling Song Xiyan Wu
Copyright Year	1980
Abstract	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.
Sponsorship	IEEE Geoscience and Remote Sensing Society IEEE URSI
Starting Page	2536
Ending Page	2545
Page Count	10
File Size	1114815
File Format	PDF
ISSN	01962892
Volume Number	47
Issue Number	8
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2009-08-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	MODIS Electromagnetic coupling Remote sensing Image sensors Satellites Vegetation mapping Reflectivity Optimization methods Parameter estimation Performance analysis retrieval Dynamic model leaf area index (LAI) Moderate-Resolution Imaging Spectroradiometer (MODIS) radiative transfer
Content Type	Text
Resource Type	Article
Subject	Earth and Planetary Sciences Electrical and Electronic Engineering

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