Validation of the hot-spot model with terrestrial laser scanning

被引：0
|
作者：
Kuusk, Andres [1 ]
Sims, Allan [2 ,3 ]
机构：
[1] Univ Tartu, Tartu Observ, EE-61602 Toravere, Estonia
[2] Estonian Univ Life Sci, Inst Forestry & Rural Engn, Kreutzwaldi 5, EE-51014 Tartu, Estonia
[3] Estonian Environm Agcy, Forest Dept, Mustamae tee 33, EE-10616 Tallinn, Estonia
来源：
REMOTE SENSING OF ENVIRONMENT | 2022年 / 279卷
关键词：
Directional reflectance; Hot spot; Forest; Terrestrial laser scanning; FOREST REFLECTANCE; RADIATIVE-TRANSFER; LIDAR;
D O I：
10.1016/j.rse.2022.113108
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
Validation of the hot-spot theoretical model was carried out with extensive terrestrial laser scanning (TLS) measurements in the Jarvselja RAMI pine stand. A 120 m x 120 m x 12 m point cloud of laser hits of 1 cm resolution was built to describe the spatial structure of the crown layer. From this point cloud, foliage density was found at 1 dm resolution, and a Fourier analysis of the spatial structure of the crown layer was performed. The autocorrelation function of the transmittance of 1 dm slices of the crown layer, which controls the hot-spot profile of directional reflectance, was estimated directly from the point cloud. The determined value of the hotspot parameter was found to agree well with the value estimated indirectly from the measurements of reflectance profile in the principal plane.
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页数：7
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