This article reports the latest improvements and results
obtained with the regional method, based on the work of
at the Corsican calibration site of Senetosa
(France), where it was used for the evaluation of the Jason-
1 mission on both its nominal and interleaved orbits. In
addition, an exercise of cross-calibration was carried out
for Envisat and Jason-2 and the biases of both missions
were quantified at the Ajaccio and Senetosa calibration
sites.