Data-Specific Collective Files
The U.S. National Weather Service provides anonymous FTP access to files
containing collectives of coded observations and forecasts. The collectives
are in the same format as exchanged on the GTS and Family of Services.
The internal format of the files is described in the document OSO
File Name Standards. The naming conventions for the files are described
in the document File and Directory Name
Standards. The data is directly available at the server tgftp.nws.noaa.gov via anonymous FTP.
The following code forms are available on the server. The set of
data available includes all of the data types listed here that are received at the
NWS Telecommunication Gateway. However, these files do not include additional
data as defined by WMO Resolution 40.
Data Types List:
- DROP Sonde
- PILOT SHIP
- Profiler (BUFR)
- Supplementary Climatological Data (ASOS)
- TEMP SHIP
File and Directory Descriptions
See Directory and File Naming
Standards for information about directory and file name formats.
||Data root - for NWS Telecommunication Gateway Server
||Data in WMO character format
||Data category: surface data - land
||Data subcategory: aviation - METAR
||Data subcategory: surface synoptic - SYNOP
||Data Subcategory: Aviation - Supplementary Climate Data
||Data subcategory: aviation forecast - TAF (Terminal Area Forecast)
||Data category: surface data - sea
||Data subcategory: drifting buoy - DRIBU
||Data subcategory: ship synoptic - SHIP
||Data category: single-level upper-air data other than satellite
||Data subcategory: AIREP
||Data subcategory: AMDAR
||Data subcategory: RECON
||Data subcategory: SIGMET
||Data category: vertical sounding other than satellite
||Data subcategory: DROP sonde
||Data subcategory: Profiler - BUFR codeform
||Data subcategory: Rawinsonde - fixed land (TEMP, PILOT)
||Data subcategory: Rawinsonde - ship (TEMP SHIP, PILOT SHIP)
Data is updated on the FTP server every five minutes with the latest information
received from NWS communications sources. File names within each data subcategory
directory have the format sn.nnnn where nnnn is a four-digit
number ranging from 0000 to 0300. Files are written in sequence with the
file sn.0000 following sn.0300. This scheme provides unique file names
for at least the previous 24 hours of data receipt.
The first line of the file is the time when the file was last updated
and consists of the abbreviated day of the week, abbreviated month name,
day of month, hour, minute, second, time zone, and year. All remaining
lines in the file have the form:
path [tab] name
where path is the data subcategory path, starting at the data
root and name is the name of the most recently written file for
Data files are written only when data of that subcategory type is available.
Further questions or comments concerning data in SL.us008001 path may
be directed to NWS.ISG@noaa.gov.