The Soil Behaviours of the GNSS Station

Abstract

The quality of GNSS data is very significant for determining the locations and kinematic structures of the station points. Therefore, the quality of the measurements needs to be high as well as the geological stratigraphy and the continuity of tectonic mechanism in subsurface of the point where the GNSS station is built should be investigated in detail. For this purpose in this study, the geophysical studies realized in the GNSS station are presented for interpreting the kinematic origin of the results of GNSS measurements which were obtained in Izmir (Turkey). In this scope, the GNSS data processing results and gravity changes were evaluated of the GNSS station wherein obtained GNSS and microgravity data for 3 years. In the results of 3 years measurements, it was pointed out that this GNSS station presented different movements relative to other GNSS stations. Therefore, it is requested to investigate whether the tectonic mechanism or the soil causes these differences. In this way, the soil dynamic analysis was realized by using the S velocity and density values obtained from the multichannel analysis of surface waves (MASW) method and gravity measurements realized in the GNSS station and its surrounding. Consequently, it is pointed out that the soil of GNSS station wherein seismically active region is also affected by the active environment. Therefore, all physical conditions needs to be taken account while interpreting the tectonic features of the findings obtained from this type of GNSS station.