Abstract:Due to the variation of amplitude of deformation observation time series, we use the least square method, the piecewise least square method based on F-test and the sliding Fourier method, to fit the annual period, respectively. The advantages, disadvantages and applicability of these three methods are analyzed by comparing the fitting residuals. The results show that they are all reasonable fitting in the case of the uniform or the gradual annual periodic amplitude. Otherwise, the piecewise least square method based on F-test, which would cause steps and discontinuous periods, is much better than the other two fitting methods.
WANG Wei,LI Hongyu,YE Biwen et al. Research on the Method for Annual Period Detection of Variable Amplitude for the Time Series of Deformation[J]. jgg, 2020, 40(1): 7-10.