机载DGPS与飞控系统GPS辅助空中三角测量精度对比分析

发布时间：2018-03-13 13:14

本文选题：GPS辅助空中三角测量　切入点：控制点　出处：《测绘通报》2017年S1期 　论文类型：期刊论文

【摘要】：在同一架次飞行作业时,分别由机载差分GPS设备与无人机飞行控制系统GPS模块获取两组相机曝光时刻摄站点三维坐标。首先对比分析了两组摄站点坐标精度,然后运用两组摄站点坐标分别进行辅助空中三角测量,并对比分析不同控制点个数情况下两组数据辅助空三加密成果精度。结果表明,机载差分GPS获取的摄站点坐标与无人机飞控系统GPS模块获取的摄站点平面点位平均差值为4.606 m,高程平均差值为6.383 m;摄站点坐标精度对GPS辅助空三加密精度有较大影响,特别是在平面位置精度上;在无控制点和较少控制点参与情况下,差分GPS辅助空三加密成果精度远优于飞控系统GPS辅助空三加密成果;随着控制点的增加,两种GPS辅助空三加密成果精度均显著提高,两种空三加密成果精度迅速逼近。
[Abstract]:In the same flight operation, the 3D coordinates of the two camera exposure time shooting stations are obtained by the airborne differential GPS equipment and the UAV flight control system GPS module respectively. Firstly, the coordinate accuracy of the two sets of cameras is compared and analyzed. Then, two sets of aerial triangulation coordinates are used to measure the air triangulation, and the precision of the two sets of data aided by air triangulation is compared and analyzed with different number of control points. The results show that, The average difference of aerial station coordinates obtained by airborne differential GPS and that obtained by GPS module of UAV flight control system is 4.606m, and the average difference of elevation is 6.383m.The coordinate precision of the camera station has great influence on the precision of GPS aided space triple encryption. Especially in the plane position accuracy, the accuracy of differential GPS aided air triple encryption is much better than that of flight control system GPS aided space triple encryption under the condition of no control points and less control points, and with the increase of control points, the accuracy of differential GPS aided space triple encryption is much better than that of flight control system. The precision of two kinds of GPS aided space-triple encryption is improved remarkably, and the precision of two kinds of space-triple-encryption is approaching rapidly.
【作者单位】：天津航天中为数据系统科技有限公司;
【分类号】：P228.4;P231.4

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