Study On Wavelet Correlation In Geodetic Signal

Based on the basic theory of wavelet analysis, this paper introduced wavelet spectrum analysis, wavelet entropy analysis and wavelet correlation analysis in detail. Combined with GPS coordinates time series signal of CASH,RIZH,TAIN,WUDI and troposphere delay correction data of CASH,JIMO,RIZH,WUDI, this paper explored the question of characteristics information,correlation and coherence according to the effectiveness of wavelet spectrum, wavelet entropy and wavelet correlation,coherence analysis to GPS coordinates time series signal and troposphere delay correction data. The main contents of the paper were following:Around the Fourier spectral, wavelet spectrum and wavelet entropy analysis theory, the simulation signal analysis respectively, verify the effectiveness of various methods. Put the GPS coordinates time series signal of CASH,RIZH,TAIN,WUDI into wavelet spectrum analysis and wavelet entropy analysis, the results show that wavelet spectrum analysis can effectively detect the time series of the existence of periodic signal of the information in the time domain. These cyclical information can from the side that CASH, RIZH,TAIN,WUDI four stations are behind the correlation of the data; Four monitoring stations analysis results are basically the same in the map of wavelet entropy. Four stations that forces the same basic data up regularity, basically the same complexity.Troposphere delay correct data of CASH,JIMO,RIZH,WUDI were obtained through the GAMIT software. By using wavelet theory of correlation analysis, put the data into correlation analysis of wavelet. The results show that Shandong monitoring carried related delay between quantity is close, not appear larger float. Minimum related delay for forward delay, in the CASH-RIZH, the biggest related delay for backward delayed, took place in the RIZH-JIMO.Discussed the wavelet coherence analysis method. Put the east direction,north direction and vertical direction of GPS coordinates time series signal of CASH,RIZH. TAIN,WUDI into coherence analysis and phase correlation analysis. The results show that north of the direction of between the lunar cycle, seasonal cycle the wavelet coherence is stronger, show that the lunar cycle is stronger, the influence factors have certain regularity; The monitoring stations seasonal cycle of direction between the phase coherence is weak, the half year cycle the direction of the coherence of the phase is stronger.