The Time Series Spectral Analysis of Satellite Altimetry and Coastal Tide Gauges and Tide Modeling in the Coast of Caspian Sea

This study endeavors todeal with the least square spectral analysis on the time series, to findpresent significant frequencies, to analyze 40 tide components using harmonicmethods and to show relationship between discovered frequencies and 40components of tide. For the purpose of collecting data of altimetry satellitesof Topex/Poseidon (T/P), Jason 1, Jason 2 and coastal tide gauges of BandarAnzali, Noshahr, and Nekah were utilized. In this time series formed by crossover points of altimetry satellite and then using least square spectralanalysis on time series derived from altimetry satellite and coastal tidegauges the significant components were found and annual, biannual, and monthlycomponents were discovered. Then, analysis of 40 tide components was conductedusing harmonic method to find the amplitude and phase. It represented thatsolar annual (Sa) plays the most significant role on Caspian Sea correspondedto the least square spectral analysis of the time series. The results showsthat the annual (Sa) and semi-annual Solar (Ssa) constituents on all of theports listed have the highest amplitude in comparison with the otherconstituents which are respectively 16 cm, 18 cm and 15 cm for annualconstituent and 2.8 cm, 5.4 cm and 3.7 cm for semi-annual constituent.