邢艳秋, 王立海. 基于ICESat-GLAS完整波形的坡地森林冠层高度反演研究——以吉林长白山林区为例[J]. 武汉大学学报 ( 信息科学版), 2009, 34(6): 696-700.
引用本文: 邢艳秋, 王立海. 基于ICESat-GLAS完整波形的坡地森林冠层高度反演研究——以吉林长白山林区为例[J]. 武汉大学学报 ( 信息科学版), 2009, 34(6): 696-700.
CHEN Nan, WANG Qinmin. ICESat-GLAS Full Waveform-based Study on Forest Canopy Height Retrieval in Sloped Area—A Case Study of Forests in Changbai Mountains,Jilin[J]. Geomatics and Information Science of Wuhan University, 2009, 34(6): 696-700.
Citation: CHEN Nan, WANG Qinmin. ICESat-GLAS Full Waveform-based Study on Forest Canopy Height Retrieval in Sloped Area—A Case Study of Forests in Changbai Mountains,Jilin[J]. Geomatics and Information Science of Wuhan University, 2009, 34(6): 696-700.

基于ICESat-GLAS完整波形的坡地森林冠层高度反演研究——以吉林长白山林区为例

ICESat-GLAS Full Waveform-based Study on Forest Canopy Height Retrieval in Sloped Area—A Case Study of Forests in Changbai Mountains,Jilin

  • 摘要: 为了评价大光斑激光雷达在坡地反演森林冠层高度的能力,以长白山汪清林区为例,利用冰、云和陆地高程卫星(ICESat)上搭载的地学激光测高系统(GLAS)提供的完整波形数据,在不同地形坡度范围内,以激光波形长度和地形指数为变量建立森林冠层高度反演模型。研究结果显示,在0~5°坡度范围所建立的模型能够解释90%的冠层高度,随着坡度范围的扩大,相对应的模型反演精度显著下降。总体来讲,在地形坡度不大于15°的地区,GLAS波形能够比较合理地反演森林冠层高度,具有很大的应用潜力。

     

    Abstract: To test and evaluate the capabilities of the large-footprint LiDAR for estimating canopy height in sloped areas,the full waveform data of the geoscience laser altimeter system(GLAS) onboard the ice,cloud,and land elevation satellite(ICESat) were used to retrieve forest canopy heights in Wangqing of Changbai mountains.The forest canopy height was regressed as a function of waveform extent and terrain index in terms of terrain slope ranges.The results show that final regression model for slope category of 0 to 5° could explain 90% variance of forest canopy heights.With the increasing of slope categories,the model performance significantly declines.Generally,for the forest canopy height in the area with terrain slope not larger than 15°,the GLAS waveform data provides reasonable prediction and has great potential for applications.But its capabilities in the areas with terrain slope larger than 15° needs to be further investigated.

     

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