For this study, the DAC was extracted from a regional
simulation of the TUGO model provided by the LEGOS,
for both the altimetry and the tide gauges datasets. The
complete solution of the model contains the response of
the sea surface for all the periods and it is consequently
not necessary to use the IB approximation in this case.
Moreover, the model contains the radiational part of the
S2 wave and the S1 radiational wave. This is why the S1
wave was not included in the tide correction.