Number of observations
Plots of the number of records decoded for surface reports at CMC in 6-hour periods, divided by format of report:SYNOP/, Automatic SYNOP, WMO-FM-13 SHIP, Buoys, WMO-FM-18 DRIFTER.

O-P and O-A Statistics
Plots of mean and std of observations minus first guess and observations minus analysis, and plots of the number of observations, after the selection procedure. Means are performed over a 6h period.