CCI THREDDS Data Server Catalog https://data.cci.ceda.ac.uk/thredds/catalog/esacci/sst/data/comparison/AVHRR_Pathfinder/1999/04/21/catalog.html

Dataset Size Last Modified
     Folder  21   --
         19990421155459-NODC-L3C_GHRSST-SSTskin-AVHRR_Pathfinder-PFV5.2_NOAA14_G_1999111_day-v02.0-fv01.0.nc 13.55 Mbytes 2013-11-22T13:47:05Z
         19990421031109-NODC-L3C_GHRSST-SSTskin-AVHRR_Pathfinder-PFV5.2_NOAA14_G_1999111_night-v02.0-fv01.0.nc 12.92 Mbytes 2013-11-22T13:47:05Z

CCI THREDDS Data Server at CEDA see Info
Documentation