线扫描式机载LiDAR系统误差影响分析研究

Analysis of the influences caused by systematic errors of line scanning airborne LiDAR

机载LiDAR系统会受到多种误差源的影响,系统误差会给激光脚点的坐标带来系统偏差。针对安置向量误差、安置角误差、激光测距误差以及扫描角尺度因子误差这几种重要误差源,从机载LiDAR系统几何定位方程出发,推导了机载LiDAR系统误差影响计算公式,并结合模拟实验,分别研究了这几类误差源对激光脚点定位精度的影响规律,从理论上分析了各类误差对机载LiDAR系统定位精度的综合作用。文中的结果为设计系统检校方法并消除这些系统误差的影响提供理论依据,具有重要的参考价值。

Airborne LiDAR system can be influenced by a variety of error sources, which brings the laser foot point coordinate. Aiming at several important error source,such as the offset error, boresight angle error, laser ranging error and scanning angle scale factor error, from airborne LiDAR system geometric positioning equation, this paper derives the system error influence formula of airborne LiDAR, and respectively studies the several kinds of error sources on the influence law of laser foot point positioning accuracy combined with the simulation experiment. The synthetic influence of laser foot point coordinates of various kinds of error are analyzed and studied theoretically. The conclusions from various types of errors will have important theoretical and practical value of eliminating systemitic errors and checking post- processing LiDAR data, which servers as a reference value.