实时动态GPS_PPP在无人机光束法区域网平差中的应用  

The Application of Real-time Kinematic GPS_PPP in the UAV Bundle Block Adjustment

作　　者：柯伟钰 Ke Weiyu(Fuzhou Investigation and Surveying Institute,Fuzhou 350108,China)

机构地区：[1]福州市勘测院,福建福州350108

出　　处：《城市勘测》2020年第6期84-87,共4页Urban Geotechnical Investigation & Surveying

摘　　要：简要介绍了GPS精密单点定位(PPP)原理,给出了无电离层数学模型。将Levenberg-Marquardt(LM)算法应用于光束法区域网平差,利用IGS中心发布的Final、Rapid和RTS三种星历进行无人机光束法区域网平差,对比分析了三种星历下的摄站坐标及其光束法区域网平差的精度。实验表明,使用Rapid和Final星历计算摄站坐标的偏差在0.02 m以内,由其进行光束法区域网平差的结果几乎一致;使用RTS和Final星历计算摄站坐标的最大偏差可达0.70 m,但在四角布设地面控制点条件下的光束法区域网平差精度没有实质性差异。The principle of GPS precise point positioning(GPS_PPP)is introduced,and the ionosphere-free mathematical model is deduced in this paper.The Levenberg-Marquardt(LM)algorithm is used to the block bundle adjustment(BBA),and then three ephemeris(Final,Rapidand RTS)published by IGS center are used to unmanned aerial vehicle(UAV)BBA,and the coordinates of camera station are computed by using the three ephemeris and the accuracy of BBA are compared and analyzed.The experiment shows that the bias of camera station coordinates between Rapid and Final ephemeris is less than 0.02m,and their results of BBA are almost the same,the maximum bias of camera station coordinates between RTS and Final ephemeris is 0.70m,but there is no substantial difference in BBA results between them under the four corner ground control points.

关 键 词：实时动态GPS 精密单点定位 无人机 光束法区域网平差 

分 类 号：P228[天文地球—大地测量学与测量工程]