CCI THREDDS Data Server Catalog https://data.cci.ceda.ac.uk/thredds/catalog/esacci/precursors/data/IASI_NH3_L3/v4R/catalog.html

Dataset Size Last Modified
     Folder  v4R   --
         Folder  METOP-C/   --
         Folder  METOP-B/   --
         Folder  METOP-A/   --
         Folder  MERGED/   --

CCI THREDDS Data Server at CEDA see Info
Documentation