NDLI: Estimation of leaf area index (LAI) using POLInSAR: Preliminary research

Content Provider	IEEE Xplore Digital Library
Author	Fu Wenxue Guo Huadong Li Xinwu
Copyright Year	2011
Description	Author affiliation: Center for Earth Observation and Digital Earth, Chinese Academy of Sciences, Beijing, China (Fu Wenxue; Guo Huadong; Li Xinwu)
Abstract	Polarimetric interferometric synthetic aperture radar (POLInSAR) has been used to extract the forest height successfully. Leaf area index (LAI) is an important parameter for the estimation of forest biomass, however presently the most of LAI extraction approaches are based on optical data. For the dense forest, the optical image is mainly the reflection of the canopy surface, and it is saturated easily for the LAI retrieval. Microwave has the relative long wave length, can penetrate into the forest and even get the backscatter information of the ground surface, so it should be an ideal tool to estimate LAI. This paper built the linear relationship between the LAI and the product of tree height and extinction coefficient, the latter two parameters can be inversed by the means of POLInSAR technique. At last, this study provides a preliminary experimental result, which shows that the linear relationship between the LAI retrieved from the SPOT-5 image and the product of tree height and extinction coefficient inversed from POLInSAR based on RADARSAT-2 image pairs.
Starting Page	393
Ending Page	396
File Size	582114
Page Count	4
File Format	PDF
ISBN	9781457710032
ISSN	21537003
e-ISBN	9781457710056
DOI	10.1109/IGARSS.2011.6048982
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-07-24
Publisher Place	Canada
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Vegetation Extinction coefficients Indexes Coherence Estimation Optical saturation coherence leaf area index POLInSAR extinction coefficient
Content Type	Text
Resource Type	Article

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