Limited support from 2025-12-24 to 2026-01-01There will only be limited support during the time from wednesday, Dec 24th, to thursday, Jan 1st and creation of new WDCC account will take longer.
The ZTD (mm) is the 0-level product of the GPS data processing. It should be used for assimilation purpose. The IWV (kg/m**2) is the 1-level product of the GPS data. The conversion from ZTD to IWV is