机载RTK定位精度对无人机测图精度的影响分析

Impact Analysis of Airborne RTK Positioning Accuracy on UAV Mapping Accuracy

机载RTK定位精度存在波动现象,进而会影响无人机测图精度。针对无人机航测中机载RTK定位精度的异常波动问题,详细分析了机载RTK定位精度对无人机测图精度的影响,以及机载RTK定位精度差异成因。通过铜陵长江公铁大桥大比例尺地形图航测项目实验结果表明,机载RTK定位精度对无人机测图精度具有显著影响。因此无人机航测时应选择精度稳定可靠的RTK定位模式,并在航飞作业过程中实时监控机载RTK的定位精度;当机载RTK精度较差时,通过自建单基站方式或者通过选择RTK定位精度较好的时段进行作业,以保证大比例尺地形测图的精度。该研究成果可为无人机免像控作业规范规程的制定提供参考。

There is fluctuation about the airborne RTK positioning accuracy,which affects the mapping accuracy of UAV.To solve the problem,we analyzed the influence of airborne RTK positioning accuracy on UAV mapping accuracy and reasons for the differences of airborne RTK posi-tioning accuracy.Taking the large-scale aerial topographic mapping project of Tongling Yangtze River Highway and Railway Bridge for example,we obtained the result that the airborne RTK positioning accuracy had a significant impact on UAV mapping accuracy.Therefore,it’s recom-mended that stable and reliable RTK positioning mode should be selected during UAV aerial survey,and the real time positioning accuracy of air-borne RTK should be monitored during aerial flight operation.When the accuracy of airborne RTK is poor,we can carry out the operation by building a single base station or selecting a time period with good RTK positioning accuracy to ensure the accuracy of large-scale topographic mapping.