The file format is netCDF, and each UTH CDR file for this version contains:Longitudes and Latitudes of grid cell centres and grid cell boundaries; Observation and satellite overpass counts for ascending and descending branches; Earliest and latest time of day of pixel contribution to the monthly average, for ascending and descending branches;; Monthly average and standard deviation of 183.31±1 GHz brightness temperatures that were used to derive UTH (excluding cloudy pixels), for ascending and descending branches;Monthly average of all 183.31±1 GHzbrightness temperatures (including cloudy pixels), for ascending and descending branches;Monthly average and standard deviation of UTH (derived from channel 3 brightness temperatures);Independent, structured and common uncertainty for monthly averages of brightness temperatures and UTH, for ascending and descending branches;The dimensions of the variables in the NetCDF file are xand y, indicating east-west and north-south direction, respectively. For further information see thefile format specification in the documentation.