圆扫描式机载激光测深系统定位模型与仿真分析

发布时间：2018-04-01 19:44

本文选题：遥感　切入点：机载激光测深　出处：《中国激光》2016年02期

【摘要】：基于海岸带测绘成像雷达(CZMIL)圆扫描式机载激光测深系统的内部结构,推导了激光光线在棱镜、大气、海水中的方向矢量,并针对激光、扫描仪、光学棱镜之间的安置误差纠正激光方向向量,结合全球定位系统和惯性导航系统提供的位置姿态数据,推导出成图坐标系中的激光脚点定位模型。从直线与平面交会的数学原理出发,模拟激光光线与海面的交会过程,继而根据折射原理解算激光光线在水中的方向矢量,最终根据激光光线与水中的直线方程和海底面数学方程模拟激光脚点的位置。探讨了存在视准轴偏角时飞机姿态和航高发生较大变化对点云分布的影响,对圆扫描式机载激光测深系统误差的检校及点云位置的纠正有着实际的意义。
[Abstract]:Based on the internal structure of the circular scanning airborne laser sounding system for coastal mapping imaging radar (CZMIL), the directional vector of laser light in prism, atmosphere and sea water is derived. The placement error between the optical prism corrects the laser direction vector and combines the position and attitude data provided by the Global Positioning system and the inertial navigation system. Based on the mathematical principle of straight line and plane rendezvous, the process of laser ray intersecting with sea surface is simulated, and the direction vector of laser light in water is calculated according to the original interpretation of refraction. Finally, the position of laser foot-point is simulated according to the linear equation of laser light in water and the mathematical equation of submarine surface. The influence of the aircraft attitude and altitude on the point cloud distribution is discussed when there is an apparent axis deflection angle. It is of practical significance to calibrate the errors of circular scanning airborne laser sounding system and correct the position of point cloud.
【作者单位】：信息工程大学地理空间信息学院;
【分类号】：P229;P237

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