Data source:

1) Two tides are modeled: pole tide and long periodic zonal 
   tide. The oceanic response to these tides is considered equilibrium.
   The pole tide is the response of the oceanic mass to changes of
   the centrifugal potential due to the polar motion. The polar motion
   is modeled as a sum of a constant shift, secular drift, and three
   harmonic terms: with annual frequency, CW1 and CW2 frequencies.
   The periods that corresponds to CW1 and CW2 frequencies are 
   and 442.12 and 430.71 days respectively. Only the response to these three 
   harmonic terms is modeled. Amplitudes and phases of these harmonics 
   were fitted to series of polar motion over [1980, 2015.5]. 
   NB: one should avoid a temptation to interpret these frequencies:
   these are just fitting parameters. The rms of post-fit residuals 
   is 0.028 mas. This harmonic model allows to predict pole tide for the 
   period of [1980, 2020].

   The self-consistent equilibrium tide is computed with 8 iterations 
   according to Agnew, D. and Farrell, W.E., Geophys. J. R. Astr. Soc.,
   (1978) 171-181. At the first iteration, the vertical loading is set 
   to zero. At the next iteration, the crustal deformation from the 
   equilibrium ocean tide and the changes of the geopotential caused by 
   mass distribution are computed and added to the sea level change.
   The average ocean equilibrium tide height computed at the previous
   iteration is subtracted in order to enforce ocean water mass 
   conservation.

   10 zonal tides are modeled: 

     1:  MTM 
     2:  MTM+
     3:  MF  
     4:  MF+ 
     5:  MF 
     6:  MM  
     7:  MSM 
     8:  SSA 
     9:  SA  
    10:  NOD 

2) Love numbers were computed by J.-P. Boy. The Love numbers are computed
   in the coordinate system with the centrum at the center of mass of 
   the total Earth: solid Earth, ocean, and the atmosphere. Therefore, 
   loading displacements computed with using such Love numbers are 
   the displacements with respect to the center of mass of the total 
   Earth that includes the atmosphere.
