基于抗差估计的CPⅢ平面控制网粗差分步探测  

CPⅢcontrol network gross error step-by-step detection method based on robust estimation

作　　者：史良正 李建章 周瑞文 SHI Liangzheng;LI Jianzhang;ZHOU Ruiwen(School of Surveying,Mapping and Geographic Information,Lanzhou Jiaotong University,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

出　　处：《测绘工程》2024年第5期57-61,80,共6页Engineering of Surveying and Mapping

基　　金：国家自然科学基金资助项目(42361073)。

摘　　要：针对CPⅢ平面控制网数据处理中粗差探测和严密定权相互影响的问题,提出基于抗差估计的CPⅢ平面控制网粗差分步探测法。将方向观测值和距离观测值分别构网,形成单一类型观测值控制网,再依次针对测边网、方向网采用抗差估计进行粗差探测。实验表明,与传统闭合差检验法相比,基于抗差估计的粗差分步探测法可使CPⅢ点位中误差提高0.15 mm,相邻点位中误差提高0.25 mm,避免了粗差观测值对严密定权的影响,具有更好的粗差探测能力。Aiming at the mutual influence of gross error detection and strict weighting in data processing of CPⅢplane control network,a step-by-step detection method of gross error in CPⅢplane control network based on robust estimation is proposed.The direction observation value and the distance observation value are respectively constructed into a network to form a single-type observation value control network,and then the robust error estimation is used for the edge measurement network and the direction network in turn to detect gross errors.Experiments show that compared with the traditional poor closure test method,the coarse difference step-by-step detection method based on robust estimation can increase the error of CPⅢpoint by 0.15mm,and the error of adjacent points by 0.25 mm,thus avoiding the the need for strict observation of gross error.The influence of fixed weight has better gross error detection ability.

关 键 词：CPⅢ平面控制网 抗差估计 粗差探测 

分 类 号：P209[天文地球—测绘科学与技术]