Developing a dual-wavelength full-waveform terrestrial laser scanner to characterise forest canopy structure
Danson, FM, Gaulton, R, Armitage, RP, Mathias, D, Gunawan, OT, Philip, L, Pearson, G and Ramirez, A 2014, 'Developing a dual-wavelength full-waveform terrestrial laser scanner to characterise forest canopy structure' , Agricultural and Forest Meteorology, 198 , pp. 7-14.
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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.
|Uncontrolled Keywords:||Terrestrial laser scanner; SALCA; forest canopy structure; full-waveform; dual-wavelength|
|Schools:||Schools > School of Environment and Life Sciences > Ecosystems and Environment Research Centre
Schools > School of Environment and Life Sciences
|Journal or Publication Title:||Agricultural and Forest Meteorology|
|Funders:||Natural Environment Research Council (NERC)|
|Depositing User:||S Rafiq|
|Date Deposited:||04 Aug 2014 18:21|
|Last Modified:||30 Nov 2015 23:54|
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