The Senetosa calibration site is dedicated to the missions
flying over the nominal TOPEX/Jason orbit, whereas the
Ajaccio site is intended for the calibration of the missions
on the Envisat/ERS nominal orbit. One of the interests
of the regional calibration method is that it can be used
for any mission on any site, including interleaved orbits.
Consequently, it has been possible to continue the monitoring
of the Jason-1 mission even after the orbit change and
the results are presented in the following section. Concerning
Jason-2 and Envisat, an exercise of cross-calibration
was carried out at both calibration sites.