Developing a dual-wavelength full-waveform terrestrial laser scanner to characterize forest canopy structure
Developing a dual-wavelength full-waveform terrestrial laser scanner to characterize forest canopy structure
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DOI：
10.1016/j.agrformet.2014.07.007
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发表时间：
2014-11-01
影响因子：
6.2
通讯作者：
Ramirez, Alberto F.
中科院分区：
文献类型：
--
作者：
Danson, F. Mark;Gaulton, Rachel;Ramirez, Alberto F.
介绍了一种用于测量森林树冠三维结构的双波长全波形地面激光扫描仪的研制，并利用野外测量对该仪器的测量特性进行了评估和测试。索尔福德高级激光冠层分析仪(SALCA)测量了两个激光波长的背向散射辐射的全波形，一个在近红外(1063 Nm)，一个在短波红外(1545 Nm)。该仪器可现场携带，在仪器上方的一个完整半球内，在两个波长下测量多达900万个波形。SALCA是专门为测量森林树冠的结构特征而建造的，本文报告了使用该仪器进行野外数据收集的第一批结果。概述了波形的特点和波形数据处理，评价了双波长测量的应用，并描述了该仪器在森林试验场的现场部署情况。报告介绍了初步的仪器校准结果，并强调了在提取有关森林结构的有用信息方面面临的挑战。全波形多波长地面激光扫描仪很可能在未来提供更详细、更准确的森林结构测量。这项研究展示了SALCA如何为开发、测试和应用这项新技术在一系列与森林有关的问题上提供关键步骤。(C)2014年提交人。Elsevier B.V.出版。这是一篇基于CC by License(http://creativecommons.org/licenses/by/3.0/).的开放获取文章
The development of a dual-wavelength full-waveform terrestrial laser scanner to measure the three-dimensional structure of forest canopies is described, and field measurements used to evaluate and test the instrument measurement characteristics. The Salford Advanced Laser Canopy Analyser (SALCA) measures the full-waveform of backscattered radiation at two laser wavelengths, one in the near-infrared (1063 nm) and one in the shortwave infrared (1545 nm). The instrument is field-portable and measures up to nine million waveforms, at the two wavelengths, across a complete hemisphere above the instrument. SALCA was purpose-built to measure structural characteristics of forest canopies and this paper reports the first results of field-based data collection using the instrument. Characteristics of the waveforms, and waveform data processing are outlined, applications of dual wavelength measurements are evaluated, and field deployment of the instrument at a forest test site described. Preliminary instrument calibration results are presented and challenges in extracting useful information on forest structure are highlighted. Full-waveform multiple-wavelength terrestrial laser scanners are likely to provide more detailed and more accurate forest structural measurement in the future. This research demonstrates how SALCA provides a key step to develop, test and apply this new technology in a range of forest-related problems. (C) 2014 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/3.0/).