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Archived data may originate from e.g. routine operations (od), from research experiments (rd), reanalysis data sets (e.g. e5 for ERA5, ei for ERA interim, e4 for ERA-40), TIGGE (ti) , S2S (s2) or experiments created by Member State's users (Internet country code, e.g. uk, es,...). Operations and reanalysis are the most frequently used data classes. A full list of ECMWF classes is available online.

Example - For 1 Sep 2018 all analysis fields of :  2 m temperature fields from the operational forecast. operational analyses at all synoptic time on 1st September 2018. 

Dissemination

Not supported (as all data needs to be from class od).

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