| Effective understanding of tidal law provides technical support for human navigation,military activities and prediction of sea level changes,the use and development of satellite altimeters provide data support for the discovery and exploration of the oceans.This paper conducted the harmonic analysis of the 27 years before and 14 years after orbital transformation of four satellite altimeters?TOPEX/Poseidon and Jason-1,Jason-2 and Jason-3?data by using thej,v model.The tidal harmonic constants of 8 main tidal constituents in the Bohai,Yellow and East China sea were extracted by harmonic analysis and the results of the test and error analysis.For the first time to use the Jason-3 altimeter data to extract the tidal information,which proved that the Jason-3 altimeter data had highly available and accurate.The error of harmonic constants between ascending and descending passes at crossover points is calculated by regression analysis.To verify the reliability of research results.The RMS of harmonic constants extracted from 19 selected tidal stations in the Bohai,Yellow and East China sea were calculated and through the image to compared with the satellite altimeter data obtained from the research results.The correlation coefficient matrix diagram is used to analyze the relationship between 8 tidal fraction.Finally,the accuracy of the extracted tidal harmonic constants and the rationality of the correlation conclusion of the analysis were verified by cotidal mapping.The results indicated that the RMS of the eight main tidal constituents(M2,S2,K1,O1,K2,N2,Q1,P1)were 10.74cm,4.28cm,5.07cm,6.77cm,5.68cm,4.24cm,2.25cm,3.32cm.Compared with previous studies,the results of this paper show that the spatial resolution can be significantly improved by using satellite altimeter before and after orbital transformation long time series data,and the accuracy of extracted tidal information can be significantly improved. |
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