Measurements on individual trees using multiple VHFSAR images

被引：18

作者：

Hallberg, B ^{[1
]}

Smith-Jonforsen, G

Ulander, LMH

机构：

[1] Chalmers Univ Technol, Dept Radio & Space Sci, S-41296 Gothenburg, Sweden

[2] Def Res Agcy, Dept Radar Syst, S-58111 Linkoping, Sweden

来源：

IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING | 2005年 / 43卷 / 10期

关键词：

forest biomass; image matching; stem volume; scattering model; synthetic aperture radar (SAR); very high frequency (VHF);

D O I：

10.1109/TGRS.2005.855622

中图分类号：

P3 [地球物理学]; P59 [地球化学];

学科分类号：

0708 ; 070902 ;

摘要：

Multiple VHF-band radar images from the. airborne CARABAS-II system, retrieved with varying look direction to the imaged, area, are coregistered and combined to improve spatial and radiometric resolution. Combined images over boreal forest in southern Sweden are used to identify and make backscatter measurements of individual trees. A coregistration scheme is proposed, and backscatter is compared to ground measurements of individual stem volume. It is found that the spatial resolution and radiometric precision could be significantly improved by combining the images coherently. A nearly linear relation between backscattered amplitude and individual stem volume for trees with a stem volume over 0.2 m(3) was found, which is in agreement with previous results at stand level.

引用

页码：2261 / 2269

页数：9

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