变形监测
折射
全站仪
变形(气象学)
大地测量学
流离失所(心理学)
大气折射
航程(航空)
交叉口(航空)
准确度和精密度
均方误差
遥感
计算机科学
地质学
作者
Jianguo Zhou,Bo Shi,Guanlan Liu,Shujun Ju
出处
期刊:PLOS ONE
[Public Library of Science]
日期:2021-05-06
被引量:3
标识
DOI:10.1371/journal.pone.0251281
摘要
Robotic total stations have been widely used in continuous automatic monitoring of dam deformations. In this regard, monitoring accuracy is an important factor affecting deformation analysis. First the displacements calculation methods for dam deformation monitoring with total stations are presented, and the corresponding mean square error formulas are derived. Then for errors caused by atmospheric refraction, two correction methods are described. Simulations were conducted to compare the displacement accuracy calculated through different methods. It indicated that the difference between polar coordinate method and forward intersection is less than 0.5mm within around 400m' monitoring range, and in such cases, the polar coordinate method is preferred, as only one total station is required. Refraction correction tests with observations from two dams demonstrated that both correction methods could effectively enhance the monitoring accuracy. For observation correction, correction through the closest reference point achieves better correction results.
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