What tide models are used in the merged sea level anomaly data?
For Jason-1&2 as well as for Envisat data, the tide models are • ocean tide is deduced from GOT00.V2 model (R. Ray code) (load tide is included) • earth tide is deduced from the Cartwright tide potential • polar tide is deduced from equilibrium model (IERS conventions)Each tide data is interpolated on the altimeter data position (time/space interpolation) and subtracted to the altimeter measurement. The same tidal solutions are applied to each mission in order to minimize inter-mission biases. Independently, multi-mission inter-calibration process (crossover adjustment using Jason-2 as reference) is done considering the data corrected from all geophysical corrections (tides, tropospheric and ionospheric effects, high frequency signal aliasing effect, …).
