STATISTICAL ANALYSIS AND MODELING OF DATA OF HORIZONTAL PENDULUM TILTMETER OF TAIAN SEISMIC STATION

On basis of statistical analysis on over 20 years' optical recording data and 8 years digital data of horizontal pendulum at TaiAn reference seismic station,a annual variation law of earth tide is obtained,which is used as a basic model for further data analysis.Meanwhile,the reason why the two instruments which are lied on the same instrument frusta showing different changing trends is discussed through comparison of annual change curves of optical recording and digital recording.