搭载POS数据的无人机影像提高定位精度的方法  

A Method to Improve Positioning Accuracy of UAV Image Based on POS Data

作　　者：贾鑫 杨树文 张志华 闫如柳 JIA Xin;YANG Shuwen;ZHANG Zhihua;YAN Ruliu(Faculty of Geomatics,Lanzhou Jiaotong University,Lanzhou 730070,China;National-Local Joint Engineering Research Center of Technologies and Applications for National Geographic State Monitoring,Lanzhou 730070,China;Gansu Provincial Engineering Laboratory for National Geographic State Monitoring,Lanzhou 730070,China)

机构地区：[1]兰州交通大学测绘与地理信息学院,兰州730070 [2]地理国情监测技术应用国家地方联合工程研究中心,兰州730070 [3]甘肃省地理国情监测工程实验室,兰州730070

出　　处：《遥感信息》2019年第4期92-96,共5页Remote Sensing Information

基　　金：国家重点研发计划(地球观测与导航)(2017YFB0504201);国家自然科学基金(41761082);兰州市人才创新创业项目(2015-RC-28);兰州交通大学优秀平台支持(201806)

摘　　要：针对无人机航测依赖原始POS数据成像地理目标定位的精度较低问题,提出了一种建立误差模型纠正POS数据用于无人机成像的方法。鉴于原始POS数据存在系统误差,通过分析其误差来源,并根据奇、偶行带间影像外方位线元素误差具有相反性,建立POS数据纠正模型;利用误差改正数对原始机载POS数据进行纠正,并用改正后POS数据进行影像坐标定位精度对比。实验结果表明,纠正后的POS数据减小了系统误差,可以快速、有效地提高无人机影像地理坐标定位精度。Aiming at the problem of low accuracy of imaging geographic target positioning based on original POS data in aerial survey of UAV,an error model is proposed to correct POS data for UAV imaging.In view of the systematic error of original POS data,the correction model of POS data is established by analyzing the error source and the opposite error of the external line elements between odd and even lines.The original airborne POS data are corrected with error correction number,and the corrected POS data is used to compare the positioning accuracy of image coordinates.The results show that the corrected POS data reduces the system error,which can improve the positioning accuracy of UAV image geographic coordinates quickly and effectively.

关 键 词：无人机影像 POS数据 空间后方交会 误差纠正模型 误差相反性 

分 类 号：P231[天文地球—摄影测量与遥感]