Since the Jason-1 mission launch, NOVELTIS has been
computing altimeter biases for this mission on its nominal
ground tracks in Corsica. Fig. 4 presents the configuration
of the Jason-1 nominal and interleaved tracks near the
Senetosa calibration site. For the bias estimation on the
nominal orbit, the tracks 085, 222 and 009 were used.
The track 085 directly flies over the calibration site and is
used by the OCA team to estimate the absolute bias of
the missions that fly the TOPEX/Jason nominal orbit
. The use of the regional method
on the track 085 is equivalent to the OCA method, except
that the data editing strategies and the determination of the
comparison points are slightly different. The results
obtained with both techniques can thus be compared.