Inside a validation diagnostic type, there are different diagnostics groups based on the same input data. This input data can be directly derived from altimetry measurements or corresponds to the external data used:
- Along-track altimetric components: values of the altimetric corrections (used in the sea-level calculation) or altimetric parameters (range, SWH…) or orbit calculation along the ground track of the satellite at 1 Hz and for valid measurements.
- Along-track Sea Level Anomaly (SLA): Sea level anomalies (sea surface height minus the mean sea surface) along the ground track of the satellite at 1 Hz and for valid measurements.
- Along theoretical track SLA: SLA along the theoretical ground track of the satellite at 1 Hz and for valid measurements (the sampling of the theoretical ground track is the same for each ground track allowing precise temporal analyses).
- Gridded map of SLA combined from several missions: SLA grids are derived from along-track SLA missions combining and interpolating in time and space several altimetric missions.
- SSH Crossovers: SSH differences between ascending and descending passes for time differences between both passes lower than 10 days (in order to reduce the effect of the oceanic variability).
- Tide gauges: global tide gauges network (GLOSS/Clivar, PMSL) covering all the altimetric period.
- Temperature/Salinity profiles: global network derived from ARGO data (from 2002 onwards)