作　　者： (贾继堂）; (郑凯迪）; (曹雪娟）; (李少朋）; (孙振蓉）;

机构地区： 天津航天中为数据系统科技有限公司

出　　处： 《测绘通报》 2017年第S1期11-14,17,共5页

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。 Both GPS module of unmanned aerial vehicle( uav) flight control system and airborne differential GPS devices get coordinates of GPS camera stations at the same time in one sortie. In this paper,firstly,an comparative analysis of the accuracy were made between two kind of coordinates of GPS camera stations. Then,an comparative analysis of the accuracy were made between DGPS-supported aerotriangulation and airborne flight control system GPS-supported aerotriangulation with different number of ground control points. The results showed that there are 4. 606 and 6. 383 m difference between the two kind of coordinates of GPS camera stations in X,Y and Z. The accuracy of coordinates of GPS camera stations has a great influence on accuracy of GPS-supported aerotriangulation,especially on X,Y. The accuracy of DGPS-supported aerotriangulation is better than the accuracy of airborne flight control system GPS-supported aerotriangulation with no ground control points or fewer ground control points. With the increase of the number ground control points,the accuracy of two kind of GPS-supported aerotriangulation are significantly improved and rapidly approaching.

关 键 词： 辅助空中三角测量 控制点 摄站点 坐标 精度