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Remote Sensing Technology and Application
    
Correlation Analysis between L-band SAR and ForestStem Volume in Northeast China
Liang Zhifeng,Ling Feilong,Wang Xiaoqin
Key Laboratory of Spatial Data Mining & Information Sharing of Ministry Education, Fuzhou University,Fuzhou 350002,China)
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Abstract  Because Synthetic Aperture Radar(SAR)can penetrate into forest canopy and interact with the primary stem volume contents of the trees (trunk and branch),SAR data are widely used for forest stem volume estimation.This paper investigated the correlation between SAR data and forest stem volume in Xunke,Heilongjiang using the stand-wise forest inventory data in 2003 and ALOS PALSAR data for five dates in 2007.The influences of season and polarizations on the relationship between stem volume and SAR data were studied by analyzing the scatterplots;that was followed by interpretation of the mechanisms primarily based on a forest radar backscattering model-water cloud model.The results showed that the relationship between HV polarization backscatter and stem volume is better than HH polarization,and SAR data in summer dry conditions are more correlated to stem volume than the data acquired in other conditions.The interferometric coherence with 46-day temporal baseline is negatively correlated to the stem volume.The correlation coefficients from winter coherence are higher than those from summer coherence and backscatter.The study results suggest using the interferometric coherence in winter as the best choice for forest stem volume estimation with L-band SAR data.
Key words:  Forest Stem Volume      ALOS PALSAR      Backscatter      Interferometric Coherence     
Received:  22 August 2012      Published:  14 March 2014
TN 959.3  
  TP 79  
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Liang Zhifeng
Ling Feilong
Wang Xiaoqin

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Liang Zhifeng,Ling Feilong,Wang Xiaoqin. Correlation Analysis between L-band SAR and ForestStem Volume in Northeast China. Remote Sensing Technology and Application, 2013, 28(5): 871-878.

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http://www.rsta.ac.cn/EN/     OR     http://www.rsta.ac.cn/EN/Y2013/V28/I5/871

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