All these results presented in this article show that the
regional calibration method is generic and stable enough
to compute accurate bias estimates not only for nominal
missions at dedicated sites but also at non-dedicated sites.
It can be used as well for missions on interleaved orbits that
have no track directly flying over any calibration site. For
each mission, the bias estimates are coherent from one
crossover point to the other and the dispersion of all the
estimates is always in the order of the standard error of
the separate estimates. It means that the results are consistent
wherever they are computed around the calibration
sites, which confirms the reliability of the method. The
small discrepancies, in the order of 1–2 cm, observed from
one crossover point to the other are partly explained by the
differences in the mean sea surface profiles at the crossover
points, which are mainly due to the systematic geographically
correlated orbit errors that have different signatures
on ascending and descending tracks.