Monitoring and analyzing movements of geodetic monuments
Erol, Serdar, Bihter Erol and Rahmi Nurhan Celik
The movements of a pillar in 1.20 m height, which is an IGS reference station in Istanbul and called ISTA, were monitored continuously using two micro-radian accuracy level dual-axis digital inclination sensors in two periods with 40 days each. Also, for the same periods, the baseline solution between two continuous reference stations, ISTA and KANT, was used for the analysis. The both station are on the same plate that is north side of NAF (North Anatolian Fault). KANT, founded on the ground, is one of the continuous reference stations of MAGNET (Marmara Continuous GPS Network) and organized by Earth & Marine Sciences Research Institute, Marmara Research Center, TUBITAK (The Scientific and Technological Research Council of Turkey). The inclination sensors data and baseline solutions for two periods were analyzed using Least Squares Spectral Analysis (LSSA) and Wavelet Analysis (WA) techniques. Their results for one period and for two periods were compared and interpreted. The results of comparisons of the analysis of two different periods and also the used analysis techniques were investigated. The movements and behaviors of the ISTA- IGS reference station monument was interpreted with considering the movements of the building, which carries the pillar on its top, weather conditions, atmospheric effects and low-magnitude earthquakes during the measurement periods.
Event: XXIII International FIG Congress : Shaping the change
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