Barzaghi Riccardo, Cazzaniga Noemi Emanuela, De Gaetani Carlo Iapige, Pinto Livio, Tornatore Vincenza
Politecnico di Milano, Department of Civil and Environmental Engineering (DICA)-Geomatics and Geodesy Section, Piazza Leonardo da Vinci 32, 20133 Milan, Italy.
Sensors (Basel). 2018 Mar 2;18(3):756. doi: 10.3390/s18030756.
Global Navigation Satellite Systems (GNSS) receivers are nowadays commonly used in monitoring applications, e.g., in estimating crustal and infrastructure displacements. This is basically due to the recent improvements in GNSS instruments and methodologies that allow high-precision positioning, 24 h availability and semiautomatic data processing. In this paper, GNSS-estimated displacements on a dam structure have been analyzed and compared with pendulum data. This study has been carried out for the Eleonora D'Arborea (Cantoniera) dam, which is in Sardinia. Time series of pendulum and GNSS over a time span of 2.5 years have been aligned so as to be comparable. Analytical models fitting these time series have been estimated and compared. Those models were able to properly fit pendulum data and GNSS data, with standard deviation of residuals smaller than one millimeter. These encouraging results led to the conclusion that GNSS technique can be profitably applied to dam monitoring allowing a denser description, both in space and time, of the dam displacements than the one based on pendulum observations.
全球导航卫星系统（GNSS）接收机如今在监测应用中普遍使用，例如，用于估算地壳和基础设施的位移。这主要得益于GNSS仪器和方法的近期改进，这些改进使得高精度定位、24小时可用性以及半自动数据处理成为可能。在本文中，对一座大坝结构上GNSS估算的位移进行了分析，并与摆锤数据进行了比较。这项研究是针对位于撒丁岛的埃莱奥诺拉·达尔博雷亚（坎托尼耶拉）大坝开展的。已将2.5年时间跨度内的摆锤和GNSS时间序列进行对齐，以便具有可比性。已估算并比较了拟合这些时间序列的分析模型。这些模型能够很好地拟合摆锤数据和GNSS数据，残差的标准差小于一毫米。这些令人鼓舞的结果得出结论，即GNSS技术可有效地应用于大坝监测，与基于摆锤观测的方法相比，能够在空间和时间上更密集地描述大坝位移。
