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X-TRACK Tidal correction

FES2012 tidal models (from Carrere et al. 2012) is used to compute this correction for all missions and over every region. Tidal corrections are delivered also in a separate field in case users would want to use another tidal correction.

Further details on tidal spectra:
The tidal spectrum implemented for the tidal correction based on the FES2004 model solutions includes astronomic  constituents M2, S2, N2, K2, K1, 01, Q1, 2N2, P1, Mf, Mm, Mtm and MSqm. Semi-diurnal constituents Mu2, Nu2, L2, T2, lambda2, KJ2 and R2, diurnal constituents OO1, J1, Phi1, Pi1, Psi1, Ro1, Sigma1, Theta1, 2Q1, Ki1 and long-period constituents. MSm, MSf, Mqm, MStm are added using admittances function. Finally, non linear constituent M4, long-period constituent Ssa and radiational S1 constituents are also included.

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