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Description of the files containing the raw data and the results of SMM analysis made by the WMO Secretariat and available in the WMO FTP server

 

1. Introduction

The names of the sub-directories of the WMO FTP server and of the files contain variables. The characters representing the variables are underlined in the names. The values of these variables are as follows:

 

tt
type of data
sy
SYNOP
tt
TEMP
pp
PILOT
cl
CLIMAT
ct
CLIMAT TEMP
sh
SHIP
ts
TEMP SHIP
hy
BATHY
ac
TESAC
bu
BUOY
ai
AIREP
am
AMDAR
ba
BUFR aicraft
YY or yy year (e.g. 98) of the monitoring
M or m

month of the monitoring
M or m=4, 7, and A or a for April, July and October respectively

Example:
rsy97af.zip =
File related to the monitoring of SYNOP bulletins during the October 1997 SMM

 

2. Location and format of presentation of the files

The list of the participating monitoring centres (see hereunder paragraph 3) is available in the WMO FTP server under the sub-directory:

GTS_monitoring\SMM\from_WMO\SM<u>YYM</u>01.015\ANALYSIS\

The raw data (i.e. bulletins as received with full text, and information on the centre from which the bulletins were received and group date/time of reception) are available under the sub-directory:

GTS_monitoring\SMM\To_WMO\SMYYM01.015\

The results of the analysis (see hereunder paragraphs 5and 6 are available for each type of data under a next sub-directory which has the name of the relevant code form (AIREP, AMDAR, etc.), e.g. for AMDAR reports:

GTS_monitoring\SMM\from_WMO\SMYYM01.015\ANALYSIS\AMDAR

The files are ASCII files. The extension zip shows that the files are "zipped". The fields are surrounded by quotes (") and separated by commas.

 

3. List of the participating monitoring centres

The list of the MTN centres having participated in the SMM exercise is given in the file cntryymf.asc. Each record includes the following fields for each type of data: type of data (tt as defined above), in sequence as many fields as monitoring centres showing the locations indicators CCCC of the participating centres.

4. Raw data

The files containing the raw data are named: ccccttnn

Where:

  • cccc is the location indicator of the monitoring centre
  • nn is a sequence number

5. Analysis for fixed stations (tt=sy, tt, pp, cl or ct)

5.1 Files  rttyymf

These files provide information on the number of reports received from each RBSN station. Each record includes the following fields for each RBSN station: Regional Association, country code, RBSN station index number, in sequence as many fields as monitoring centres ordered by their location indicators CCCC showing the number of reports received by each monitoring centre from the RBSN station, and number of reports received by the monitoring centres from the RBSN station as a whole.

5.2 Files rbttyymf

These files provide information on the abbreviated headings of the bulletins into which at least one report from a RBSN station was compiled. Each record contains the following fields for each abbreviated heading: index number of the RBSN station (a report of which was received under the heading), abbreviated heading, in sequence as many fields as monitoring centres ordered by their location indicators CCCC (the field is blank if a report from the relevant RBSN station was received in any bulletin by the centre, value "1" otherwise).

5.3 Files bttyymf

These files provide information on each bulletin received. Each record contains the following fields for each individual bulletin received: TTAAII, CCCC, YYGGgg, BBB, number of reports received within the bulletin, best group date/time YYGGgg of reception, in sequence as many fields as monitoring centres ordered by their location indicators CCCC showing the difference in minutes between the time of reception of the bulletin at the centre and the best date/time of reception (the field is blank if the bulletin was not received by the centre).

6. Analysis for mobile stations (tt= ai, am, ba, te, bu, sh, ts)

6.1 Files raiyymf

This file provides information on each AIREP report received. Each record contains the following fields: aircraft identifier (group IA... IA), group date-time YYGGGG of the abbreviated heading of the bulletin into which the report was compiled, group hour/minutes GGgg of the observation, flag (=1 if the observation was made at the position of a beacon, which is identified in the next field, =2 if the co-ordinates are given in the next fields), identifier of the beacon or latitude (group LaLaLaLaA), blank (for a beacon) or longitude (group LoLoLoLoB), pressure altitude (group ShhIhIhI) in sequence as many fields as monitoring centres ordered by their location indicators CCCC with the value "1" if the report was received by the monitoring centre and blank otherwise.

6.2 Files ramyymf

This file provides information on each AMDAR report received. Each record contains the following fields: aircraft identifier (group IA... IA), day of the observation (group YYGG), group hour/minutes GGgg, latitude (group LaLaLaLaA), longitude (group LoLoLoLoB), pressure altitude (group ShhIhIhI), and in sequence as many fields as monitoring centres ordered by their location indicators CCCC with the value "1" if the report was received by the monitoring centre and blank otherwise.

6.3 Files rbayymf and rteyymf

This file provides information on each BATHY or TESAC report received. Each record contains the following fields: identifier of the mobile station (group D...D or A1bwnbnbnb), group day/month/year YYMMJ, group hour/minutes GGgg/, quadrant of the globe and latitude (group QcLaLaLaLaLa), longitude (group LoLoLoLoLo), in sequence as many fields as monitoring centres ordered by their location indicators CCCC with the value "1" if the report was received by the monitoring centre and blank otherwise.

6.4 Files rbuyymf

This file provides information on each BUOY report received. Each record contains the following fields: maritime zone and buoy number (group A1bwnbnbnb), group day/month/year YYMMJ, group hour/minutes GGggiw, quadrant of the globe and latitude (group QcLaLaLaLaLa), longitude (group LoLoLoLoLo), in sequence as many fields as monitoring centres ordered by their location indicators CCCC with the value "1" if the report was received by the monitoring centre and blank otherwise.

6.5 Files rshyymf

This file provides information on each SHIP report received. Each record contains the following fields: identifier of the mobile station (group D...D or A1bwnbnbnb), group day/hour YYGGiw, latitude (group 99LaLaLa), quadrant of the globe and longitude (group QcLoLoLoLo)I, and in sequence as many fields as monitoring centres ordered by their location indicators CCCC with the value "1" if the report was received by the monitoring centre and blank otherwise.

6.6 Files rtsyymf

This file provides information on each TEMP SHIP report received. Each record contains the following fields: identifier of the mobile station (group D...D), group day/hour YYGGId, latitude (group 99LaLaLa), quadrant of the globe and longitude (group QcLoLoLoLo)I, and in sequence as many fields as monitoring centres ordered by their location indicators CCCC with the value "1" if the report was received by the monitoring centre and blank otherwise.

6.7 Files bttyymf

As for the fixed stations (see above paragraph 5.3), these files provide information on each bulletin received. Each record contains the following fields for each individual bulletin received: TTAAII, CCCC, YYGGgg, BBB, number of reports received within the bulletin, best group date/time YYGGgg of reception, in sequence as many fields as monitoring centres ordered by their location indicators CCCC showing the difference in minutes between the time of reception of the bulletin at the centre and the best date/time of reception (the field is blank if the bulletin was not received by the centre).

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