Monitoring large-area mine deformation by GPS considering plate movement

The purpose of this paper is to investigate how to establish the deformation monitoring datum unification using the nearby IGS station as reference station, which is characterized by stable geologic condition, easily obtain observation data and continuous observation. We have carried out several sets of experiments to test the validity of proposed method used for large-area mine monitoring, and demonstrated the relationship between positioning accuracy and observation time. Through analysis the variation of IGS stations coordinates in time series, the fact shown that the motion of IGS station is non-linear and the max discrepancy may be more than 10mm. Therefore the IGS stations coordinates should be adopted form IGS solution when used to determine the deformation monitoring datum. Finally, an example was test for different schemes, the results show that plate movement should be considered to the high precision GPS deformation monitoring.