Optimization of GPS Observation Strategy for Improvement of Tectonic Measurements

G. Taşkin, S. Üsküplü, H. Saygin, and S. Ergintav (Turkey)

Keywords

Geodetic Network Optimization, Model Simulation, Optimization, Global Positioning System (GPS)

Abstract

With the improvement of the geodetic techniques for the observation of the fault mechanism, it became very important to determine the stability and accuracy of the measurements. Following the new technologies (e.g. GPS) and high quality observations, many studies on tectonic problems can be initiated and improved. However, the quality and reliability of data obtained and results deduced from these studies depend on the location of stations, in other words, the design of geodetic networks, measurements techniques (e.g.continuous and campaign type GPS data collection) and observation errors. In this study, station number is fixed around a strike-slip fault and it is assumed that we observe the deformation pattern with these station positions correctly, and, using simulations, we checked the relationship between the accuracy of deformation model parameters based on errors (correlated noise and monument instability) and then investigate the sensitivity of the parameters according to the number of the stations, the distance from the fault and the type of the geodetic surveying. In addition, we investigated the simulation model for different value of the fault model parameters and compared the simulation results with a real world example. The western part of the Northern Anatolian Fault in zmit region is selected as case study by using MAGNET (Marmara GPS Network).

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