This GIF was produced by the Brazilian Navy Hydrography Center – Marine Meteorological Service, one of the GNC-A users.

They’re processing the daily Sea Ice GRIB files found on the EUMETSAT GNC-A ingestion folder. This is the naming convention:

S-OSI_-DMI_-MULT-GL_SH_CONC__-YYYYMMDD1200Z.grb.gz