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The GSN is based on the routine monitoring of CLIMAT reports done by DWD and JMA in their capacities as GSN monitoring centres. The system collects a file provided monthly by DWD with information on availability and completeness of CLIMAT data for all the GSN stations recorded in OSCAR/Surface. The data report is normally made available (monthly) on the 22nd of the following month.
On the GBON upper-air module legend, what does "complete soundings" mean?
A radiosonde (sounding) is deemed complete if it measures air temperature and horizontal wind up and above 100hPa and air humidity up to 100hPa. In the GBON upper-air module only complete soundings will be used to determine the station data availability. As a result, a radiosonde delivered by a station with measurements only up to 100hPa will not be included in the station's data availability statistics.