Harmonic analysis of the tides: Based on the dynamic theory of the tides, only the periods of the partial or partial tides are initially known for each location, but not their amplitude and phase. If sufficiently long time series of the water level are available, both unknowns (amplitude and phase) can be derived from tidal observations or the results of numerical simulation calculations. This method is called harmonic analysis of the tides. The procedure of the Harnonic analysis is a special form of the Fourier decomposition of a time series. If the amplitudes and phases of the partial tides of a location are known, the water level for a given period can be predicted using harmonic synthesis of the tides, i.e. summation of the partial tides. Motivation: The calculation and graphic representation of the amplitude and phase of the partial tides of the water level serves to describe the system behavior in the North German coastal waters and estuaries, which are dominated by tidal dynamics. A comparison between values for amplitude and phase of the analyzed partial tides derived from tide observations and numerical model calculations offers a high-quality instrument for the verification of model processes, since tide spectra are compared with one another and deviations in relation to amplitude and phase can thus be precisely quantified. A precise description of the analysis modes can be found in the BAWiki (http://wiki.baw.de/de/index.php/Harmonische_Analyse_des_Wasserstands). Metadata: This metadata set is considered the parent data set for the specified metadata sets: - EasyGSH-DB_FRQW: M2 - Amplitude and Phase (1996-2015) Literature: - Hagen, R., et.al., (2019), Validation document - EasyGSH-DB - Part: UnTRIM-SediMorph-Unk, doi: https://doi.org/10.18451/k2_easygsh_1 - Freund, J., et.al., (2020), Areal Analysis of Numerical Simulations from EasyGSH-DB, doi: https:/ /doi.org/10.18451/k2_easygsh_fans_2 Annual identification sheets for the individual years are available as a summary of the annual validation on the EasyGSH-DB (www.easygsh-db.org). The EasyGSH-DB project page (www.easygsh-db.org) is available for further information. English Download: The data for download can be found under References ("further references"), where the data can be downloaded directly or via the web page redirection to the EasyGSH-DB portal. For further information, please refer to the download portal (https://mdi-de.baw.de/easygsh/EasyEN_index.html).
