差分GPS数据对无人机空三精度影响的探讨  

Discussion of the Impact From Differential GPS-Supported Data on UAV Aerotriangulation Accuracy

作　　者：刘竹均 王义[1] Liu Zhujun;Wang Yi(China Railway Eryuan Engineering Group Co. Ltd., Chengdu 610031, China)

机构地区：[1]中铁二院工程集团有限责任公司,四川成都610083

出　　处：《铁道勘察》2019年第3期1-5,共5页Railway Investigation and Surveying

摘　　要：以某高铁一个测区为例,进行无人机影像差分GPS坐标和外控点坐标联合空三加密的计算试验,以分析有无像主点差分GPS数据、不同控制点布设方案对空三加密精度的影响。试验结果表明,加入差分GPS数据进行区域网平差,可以有效提升区域网的高程精度,且外控点布设方案对空三加密精度的影响远小于加入像主点差分GPS数据对空三加密精度的影响。In this paper, the authors used an survey area of one high-speed railway as an example, performed a test calculation of aerotriangulation combining both differential GPS data and the coordinates of ground control points, and analyzed whether the input of differential GPS data of the UAV image principal points, as well as the layouts of ground control points, would impact the accuracy of aerotriangulation. The results show that using differential GPS data as an input of block adjustment in aerotriangulation would improve the vertical accuracy of the whole block network obviously;and the layouts of ground control points have less impact on aerotriangulation accuracy than using differential GPS data.

关 键 词：无人机影像 空三加密 差分GPS 区域网平差 

分 类 号：P237[天文地球—摄影测量与遥感]