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首页> 外文期刊>International journal of remote sensing >Ground-based C-band tomographic profiling of a conifer forest stand
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Ground-based C-band tomographic profiling of a conifer forest stand

机译：针叶林林分的地面C波段层析成像

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摘要

We provide a demonstration of the new tomographic profiling (IP) technique, here applied to forestry for the first time. The portable ground-based synthetic aperture radar (GB-SAR) system was used to capture profiles of the vertical polarimetric backscattering patterns through a ～7 m tall stand of Norway spruce trees. The TP scheme collects data as for normal SAR imaging, but with the antennae aligned in the along-track direction. Adaptive post-processing meant that each TP scan simultaneously captured along-track image transects over the incidence angle range 0°-60°. An important feature of the derived image products is that incidence angle is constant at every point within an image. The measured HH-W height backscatter profiles were very similar, whilst the cross-/co-polarization ratio showed very little variation with height through the stand. Backscattering profiles showed closest agreement with the branch biomass distribution through the canopy, rather than with trunk or branch + trunk biomasses. Equivalent interferometric tree heights were estimated from the centre of mass of the backscatter-height distribution, which displayed increasing height with increasing incidence angle. There was no significant vertical separation between the cross- and co-polarization returns.
机译：我们提供了新的断层分析（IP）技术的演示，该技术首次在林业中应用。便携式地面合成孔径雷达（GB-SAR）系统用于通过高约7 m的挪威云杉林捕获垂直极化后向散射图的轮廓。 TP方案收集的数据与常规SAR成像相同，但天线沿沿轨道方向对齐。自适应后处理意味着每次TP扫描会同时在入射角范围0°-60°上捕获沿轨迹图像的横断面。派生图像产品的一个重要特征是，入射角在图像内的每个点都是恒定的。测得的HH-W高度后向散射曲线非常相似，而交叉/共极化比显示出整个支架高度都几乎没有变化。反向散射剖面显示与通过冠层的分支生物量分布最接近，而不是与树干或分支+树干生物量最接近。从后向散射高度分布的质心估计等效干涉树的高度，该高度随入射角的增加而增加。交叉极化和同极化返回之间没有明显的垂直间隔。

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  • 来源
    《International journal of remote sensing》 |2013年第22期|7838-7853|共16页
  • 作者

    Keith Morrison; John Bennett; Svein Solberg;

  • 作者单位

    Department of Informatics & Systems Engineering, Cranfield University, Shrivenham, Swindon SN6 8LA, UK;

    Department of Electronic & Electrical Engineering, University of Sheffield,Sheffield S1 3JD, UK;

    Norwegian Forest and Landscape Institute, Pb 115, NO-1431 As, Norway;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
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