If you are looking for the procedures of posting the upper-air domain-averaged scores (a.k.a. "WMO scores") please refer to the respective document.
One file shall contain scores relevant to one parameter and one month. In order to reduce the data volume and facilitate the data transfer the files can be additionally compressed by one of the supported methods: GZIP (DEFLATE method), ZIP or BZIP2.
Should the originating centre wish to compress the data file it is requested to liaise with LCDNV to verify LCDNV can handle the chosen compression method.
The format of the files is described here.
Pattern for file names
yyyymm _ cccc _ PARAM .svs[. zzz ]
where:
yyyymm is year and month of the calendar month data are relevant for;
cccc is the 4-character WMO identifier of the originating centre
(ammc=Melbourne, cwao=Montreal, dems=New Delhi, ecmf=ECMWF, edzw=Offenbach, egrr=Exeter, kwbc=Washington, lfpw=Toulouse, rjtd=Tokyo, rksl=Seoul, rums=Moscow, ...);
PARAM is the string identifying the parameter:
| parameter name | units | |
|---|---|---|
| t2m | air temperature at 2 meters above the model orography | K |
| td2m | dewpoint at 2 meters above the model orography | K |
| rh2m | relative humidity at 2 meters above the model orography | % |
| tp06 | total precipitation accumulated over previous 6 hours | mm |
| tp24 | total precipitation accumulated over previous 24 hours | mm |
| ff10m | speed of wind at 10 meters above the model orography | m/s |
| dd10m | direction of wind at 10 meters above the model orography | deg |
| tcc | total cloud cover | okta (rounded to nearest okta for contingency table) |
| mslp | mean-sea-level pressure | hPa |
| z500hPa | geopotential height of 500hPa level | m |
| t850hPa | air temperature at 850hPa level | K |
| w850hPa | (vector) wind speed at 850hPa level | m/s |
| r700hPa | relative humidity at 700hPa level | % |
zzz is optional suffix labelling used compression:
| zzz value | compression method |
|---|---|
| gz | GZIP |
| zip | ZIP (one file only) |
| bz2 | BZIP2 |
Example
201602_ecmf_rh2m.svs.gz
Incoming files
Originating centres should upload their files to the FTP server aux.ecmwf.int (using login wmolcdnv) to the directory /data/incoming/ (URL ftp://wmolcdnv@aux.ecmwf.int/data/incoming/)
The incoming directory for incoming files will be periodically scanned and new files processed. If a new file passes the syntax check it will be moved to the archive directory and its content imported to the LC DNV score database.
Archived files
URL sftp://wmolcdnv@aux.ecmwf.int/, directory: /data/svs/cccc/
(for the centre identifier cccc see above).
Note the preferable transfer protocol is SFTP, although the plain FTP can be also used. For information on how to get access to FTP server please check here.