BDS辅助无人机免像控三角测量数据处理方法研究

Research on data processing method of BDS assisted unmanned aerial vehicle image-free control triangulation

针对无人机空中三角测量处理需要外业控制点数量多、工作量大的问题,提出了北斗卫星导航系统(BDS)辅助无人机大比例尺免像控精度验证方法.该方法利用搭载双频全球卫星导航系统(GNSS)接收机的无人机摄影测量平台接收BDS数据,探讨了高精度的BDS摄站坐标解算、BDS数据与无人机影像数据联合平差关键技术,最后,以工程实例验证该方法的有效性.实验结果表明:此方法在无像控点情况下满足1∶500的大比例测图精度要求.

Aiming at the problem of large number of field control points and heavy workload in the spatial triangular processing of unmanned aerial vehicle,the BeiDou Navigation Satellite System(BDS)assisted unmanned aerial vehicle large-scale image control free accuracy verification method is proposed in this paper.The unmanned aerial vehicle photogrammetry platform equipped with dual frequency Global Navigation Satellite System(GNSS)receiver is used to receive BDS data.The key technologies of highprecision BDS camera station coordinate solution and joint adjustment of BDS data and unmanned aerial vehicle image data are discussed and analyzed.Finally,an engineering example is given to verify the effectiveness of the method.The experimental results show that the method can meet the accuracy requirements of 1∶500 large scale mapping without the participation of image control points.