GNGTS 2022 - Atti del 40° Convegno Nazionale

GNGTS 2022 Sessione 1.3 169 and data into Universal Time Coordinates (UTC), communicate with the switching unit via SCPI directives, scaling the magnitudes and storing the measurements. Experimental Results. After the onsite implementation and calibration of the equipment, gravitational variations were started to be detected due to tidal variations. Processing of the data, such as removing outliers and applying a 3rd degree polynomial approximation with a 512-point window. Figure 3 shows the experimental results obtained in the period between the 10 th of April 2022 to the 21 st of April 2022. The data plotted in red represent the theoretical gravitational acceleration while the data plotted in green represent the acquired data. Fig. 3 - Theoretical vs Experimental Gravitational Force due to Tidal Variations. Conclusions. Themainobjectiveof this researchwas todesignand implement ameasurement node for gravitational applications in Arcavacata di Rende, a small city in the north of Calabria. The preliminary obtained results proved to follow the theoretical tidal variations in the month of April 2022, which allows us to conclude that the gravitational node is working properly, and that the data obtained by it can be utilized in upcoming research projects. In particular, we plan to apply data analysis techniques designed for nonlinear and non- stationary phenomena, as for example wavelets and the Empirical Mode Decomposition, to tidal time series, in order to investigate the properties of the deviation between empirical acquisition and theoretical models. This will allow us to investigate the physical properties of perturbation to the usual tides. References Agilent: Agilent Technologies. Agilent 34970A Data Acquisition and Switching Unit Manual. < https://www.avionteq. com/document/34901A-specification-sheet.pdf.> Albano A., Corrado G.; 2013: Five years of continuous gravity observations in the Neapolitan volcanic area . Bollettino di Geofisica Teorica ed Applicata, 54, 1-21, DOI 10.4430/bgta0065. Albano A., Corrado G., Gervasi A. and Guerra I.; 2015: Continuous gravity and tilt observations in an active geodynamic area of southern Italy: the Calabrian Arc system. Bollettino di Geofisica Teorica ed Applicata, 56, 1-18, DOI 10.4430/bgta0133 Applied Geomechanics: 700-Series Platform and Surface Mount Tiltmeters. User Manual. <http://docs.eao.hawaii . edu/JCMT/elec/inclinometer/002/700Series_B88_1016F.pdf > LaCoste and Romberg: A New Generation Dynamic Gravity Meter Manual. < http://www.lacosteromberg.com/pdf/ airSea.pdf.>