期刊名称：ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences
印刷版ISSN：2194-9042
电子版ISSN：2194-9050
出版年度：2005
卷号：XXXVI-3/W19
页码：1-6
出版社：Copernicus Publications
摘要：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 .ying heights. Sensor noise and relative accuracy is evaluated through 4 cardboard tables, being plain and homogeneously re.ecting. The standard deviation of all laser returns from such a target decreases with lower .ying altitude, as well as positional offsets computed tend to increase with .ying altitude. The positional error along track is smaller than across track, probably due to different point spacing in these two directions. Target size and re.ectance effects are assessed using wooden slats of different widths and colors. The effect of re.ectance 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 re.ectance 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
关键词：laser scanning; accuracy; high resolution; point clouds; sensor specifications
