摘要
针CPⅢ三角高程控制网数据处理后系统误差残余较大的问题,该文提出了顾及方向差异的CPⅢ三角高程控制网数据处理方法。通过实测数据进行对比实验,证明该方法与未顾及球气差方向差异的CPⅢ三角高程控制网数据处理方法相比,数据处理后高程中误差在限差为1mm的情况下整体降低约0.2mm,相邻点高差相对中误差在限差为0.5mm的情况下整体降低约0.04mm,同时也证明了CPⅢ三角高程控制网中各测站球气差影响确实存在方向差异。
In response to the problem of significant residual system errors after data processing in the CPⅢ triangular elevation control network,a data processing method that takes into account directional differences in the CPⅢ triangular elevation control network was proposed in this paper.Through comparative experiments on measured data,it was proved that compared with the data processing method for the CPⅢ triangular elevation control network that did not take into account the directional differences of the spherical air difference,the average elevation error after data processing decreased by about 0.2mm overall under a limit of 1mm;the relative mean square error of the height difference between adjacent points was reduced by approximately 0.04mm overall with a limit of 0.5mm,which also proved that there is indeed a directional difference in the influence of the spherical air difference among different stations in the CPⅢ triangular elevation control network.
作者
周瑞文
李建章
史良正
ZHOU Ruiwen;LI Jianzhang;SHI Liangzheng(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)
出处
《测绘科学》
CSCD
北大核心
2023年第12期58-65,共8页
Science of Surveying and Mapping
基金
国家自然科学基金项目(42361073)
兰州交通大学优秀平台支持项目(201806)
关键词
轨道控制网
三角高程
球气差
矩阵优化
数据处理
track control network
triangular elevation
spherical air difference
matrix optimization
data processing
