ASSESSMENT OF SENSOR CHARACTERISTICS OF AN AIRBORNE LASER SCANNER USING GEOMETRIC REFERENCE TARGETS
ASSESSMENT OF SENSOR CHARACTERISTICS OF AN AIRBORNE LASER SCANNER USING GEOMETRIC REFERENCE TARGETS
复制标题
使用几何参考目标评估机载激光扫描仪的传感器特性
DOI：
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发表时间：
2005
期刊：
影响因子：
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通讯作者：
N. Daniel
中科院分区：
文献类型：
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作者：
Lukas Wotruba;F. Morsdorf;E. Meier;N. Daniel
为了深入了解现代机载激光扫描系统的特性，我们在跑道上进行了一组几何目标和不同飞行高度的实验。传感器噪声和相对精度通过4张纸板表进行评估，平实均匀反射。该目标所有激光回波的标准差随飞行高度的降低而减小，位置偏移随飞行高度的增加而增大。沿轨道的位置误差小于沿轨道的位置误差，这可能是由于这两个方向上的点间距不同。使用不同宽度和颜色的木条评估目标尺寸和反射效果。反射率对目标可见度的影响远大于目标尺寸的影响，这与理论研究结果一致。有效的足迹大小试图由具有高反射率的板条形成星形来确定。几何足迹尺寸（仅通过光束发散计算）与有效足迹尺寸的差异随着测量距离的增加而增大，有效足迹直径小于几何足迹尺寸。
In order to get an experimental insight on the characteristics of a modern airborne laser scanning system, we carry out a set of experiments using geometrical targets on an air strip and use different flying heights. Sensor noise and relative accuracy is evaluated through 4 cardboard tables, being plain and homogeneously reflecting. The standard deviation of all laser returns from such a target decreases with lower flying altitude, as well as positional offsets computed tend to increase with flying altitude. The positional error along track is smaller than across track, probably due to different point spacing in these two directions. Target size and reflectance effects are assessed using wooden slats of different widths and colors. The effect of reflectance on target visibility is much larger than the effect of target size, which is in agreement to theoretical findings. Effective footprint size is attempted to be determined by slats with high reflectance forming a star. The difference between geometric (computed only by beam divergence) and effective footprint size increases with measurement distance, with the effective diameter being smaller than the geometric one.
影响因子：
13.5
作者：
Næsset, E
通讯作者：
Næsset, E