摘要
目前,差分型无人机已广泛应用于军事和民用多个领域,其高精度定位优势为机载导航和地理信息数据生产提供了不可替代的作用。就目前差分GNSS系统而言,理论定位精度仅是静态条件下的测试结果,这样就很难为辅助光束法平差提供足够的精度依据,致使空中三角测量过程仍无法摆脱对控制点的依赖。文中以优化无人机影像对地定位结果为目标,在GNSS辅助空中三角测量过程中,探索差分型无人机的动态定位精度,以此为基础,研究出摄站坐标权值对定位精度的影响规律。实验证明,无人机差分GNSS技术配合最佳摄站权值下的辅助光束法平差,能改善定位精度,获得目标三维信息最优解。
At present,differential UAV had been widely used in military and civil fields.Advantages of high-precision positioning provided the irreplaceable role for the airborne navigation and the geographic information data production.As far as the current differential GNSS system was concerned,the theoretical positioning accuracy was only the test result under the static conditions,so it was difficult to provide enough accuracy basis for the auxiliary bundle adjustment,which made the aerial triangulation process still unable to get rid of the dependence on the control points.In this paper,in order to optimize the positioning results of UAV images to the ground,in the process of GNSS-supported aerial triangulation,the dynamic positioning accuracy of differential UAV was explored.Based on this,the influence law of the coordinate weight of the camera station on the positioning accuracy was studied.Experiments showed that the UAV differential GNSS technology combining with the auxiliary bundle adjustment under the optimal camera station weight could improve the positioning accuracy and the optimal solution of the three-dimensional coordinates was obtained.
作者
李飞
袁凯
张超
Li Fei;Yuan Kai;Zhang Chao(Jinan Geotechnical Investigation and Surveying Research Institute,Jinan 250101,China)
出处
《矿山测量》
2021年第3期68-73,89,共7页
Mine Surveying
