摘要
本文提出一种仅利用激光跟踪仪所观测的高精度距离观测值参与平差来建立控制网的方法。利用徕卡AT960激光跟踪仪建立三维测边控制网,在网中采用空间后方交会计算各点位初始近似坐标,然后利用秩亏自由网平差模型进行平差,平差过程只有高精度距离观测值参与,排除角度观测值建立高精度控制网。该控制网建立的方法减轻甚至消除了角度观测值误差对于最终点位误差的影响,平差结果表明,空间点三维坐标平差值反算的距离与测量距离的差值优于8μm,单位权中误差为12μm,证明了该方法的准确性。
This paper proposes a method that only uses the high-precision distance observations observed by the laser tracker to participate in the adjustment to establish a control network.Use the Leica AT960 laser tracker to establish a three-dimensional edge measurement control network,use the spatial rear intersection to calculate the initial approximate coordinates of each point,and then use the rank-deficiency free network adjustment model to perform the adjustment.The adjustment process only has high-precision distance observations.Participate,eliminate angle observations and establish a high-precision control network.The method established by the control network reduces or even eliminates the influence of the angle observation value error on the final point position error.The adjustment result shows that the difference between the back-calculated distance of the spatial point three-dimensional coordinate adjustment value and the measured distance is better than 8μm.The error in weight is 12μm,which proves the accuracy of the method.
作者
谭舸
赵梦娜
吴冲
TAN Ge;ZHAO Mengna;WU Chong(School of Geodesy and Geomatics,Wuhan University,Wuhan 430079,China)
出处
《测绘通报》
CSCD
北大核心
2020年第S01期107-110,共4页
Bulletin of Surveying and Mapping
关键词
激光跟踪仪
测边控制网
秩亏网平差
后方交会
laser tracker
edge measuring control network
rank defect net adjustment
resection
作者简介
谭舸(1996—),男,硕士,主要研究方向为精密工程测量。E-mail:1242285337@qq.com
