GCOS Surface Network Reports

GSN reports provide summary counts detailing the
quantity and types of surface observations found
in the Integrated Surface Hourly (ISH) database and
indicators of the presence or absence of CLIMAT data
in the Monthly Climatic Data of the World (MCDW) 
database at the National Climatic Data Center (NCDC).

GSN summary reports are provided in two formats, 
(1) summaries of surface reports and CLIMAT data, and 
(2) summaries of the report types (METAR, SYNOP, etc) 
contained in the ISH database.  

Reports are organized by region and WMO number.

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Format #1:

These files provide monthly summaries for surface reports
in the Integrated Surface Hourly (ISH) database and
the CLIMAT reports in the Monthly Climatic Data of the 
World (MCDW) database.  ISH data are summarized by 
total observations and synoptic observations.

These data are provided in two file sizes.  The first
is smaller and contains statistics for six months or more 
of the latest data months, and the second is larger
and contains statistic beginning with January, 2001.


(a)	Filename:	GSN_sum_yyyymm_YYYYMM.txt

where	yyyymm is the starting year and month in the report,
        and
	YYYYMM is the latest available year and month.

This file contains at least six months of the latest 
available data.  The first month will always be January.


(b)	Filename:	GSN_sum_200101_YYYYMM.txt

where	YYYYMM is the latest available year and month.

This file contains a complete summary starting in January, 
2001 through the latest available month of data.

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Format #2:

These files provide summaries of the report types (METAR,
SYNOP, etc) in the Integrated Surface Hourly database.  
Column totals in the reports provide hourly counts for 
the station-year.

Filename:	GSN_types_YYYY.txt

where YYYY is the data year.