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Assessment of terrain slope effects on GLAS waveform and canopy height retrieval using 3-D vegetation model
Lu, Xue-Hui1,2; Li, Ai-Nong1; Bian, Jin-Hu1,2; Jin, Hua-An1
Corresponding AuthorLi, Al-Nong
2017
Source PublicationActa Technica CSAV
ISSN0001-7043
Volume62Issue:2Pages:441-453
SubtypeArticle
Contribution Rank1
Abstract
Academy of Sciences of the Czech Republic, Dolejskova 5, Praha 8, 182 00, Czech Republic
Abstract: To assess the terrain effects on the Geoscience Laser Altimeter System (GLAS) waveform and canopy height retrieval, the 3-D lidar waveform model was used to simulate the GLAS waveform for the nine scenes with the slopes increasing from 0 to 30 ° in 1 °. When slope increased from 0 ° to 10 °, the magnitude of the canopy peak decreased by approximately 2/5 to 3/5, but the magnitude of the ground peak decreased by more than 4/5 for all the simulated scenes. The critical slope angle is in direct proportion to canopy height, and slightly decreases with the increased stand density. Further analysis showed that average error for the RH100 was 5.4 m when the slope was 10 °, and reached 9.4 m when the slope was 15 °. Meanwhile, the average error for the physical terrain correction method was -5.6 meters even for the slopes up to 30 °. Thus, it is suitable to retrieve tree height for areas with up to 10 ° slopes using the direct method. However, a simple physical slope correction could be used in areas with greater slopes. This work enhances our understanding of the interactions between surface topography, forest structure and waveform shape.
KeywordAneroid Altimeters Forestry Landforms Radio Altimeters Vegetation
Indexed ByEI
Language英语
EI Accession NumberAccession number: 20180304647485
Accession numberAccession number: 20180304647485
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/20835
Collection数字山地与遥感应用中心
Affiliation1.Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu; 610041, China;
2.University of Chinese, Academy of Sciences, Beijing; 100049, China
First Author Affilication中国科学院水利部成都山地灾害与环境研究所
Recommended Citation
GB/T 7714
Lu, Xue-Hui,Li, Ai-Nong,Bian, Jin-Hu,et al. Assessment of terrain slope effects on GLAS waveform and canopy height retrieval using 3-D vegetation model[J]. Acta Technica CSAV,2017,62(2):441-453.
APA Lu, Xue-Hui,Li, Ai-Nong,Bian, Jin-Hu,&Jin, Hua-An.(2017).Assessment of terrain slope effects on GLAS waveform and canopy height retrieval using 3-D vegetation model.Acta Technica CSAV,62(2),441-453.
MLA Lu, Xue-Hui,et al."Assessment of terrain slope effects on GLAS waveform and canopy height retrieval using 3-D vegetation model".Acta Technica CSAV 62.2(2017):441-453.
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