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Table C7

Data Type Designator A1 for Values of T2 = S, U, O, F, and V

( when T1   =   K - CREX )

CBS XI, Cairo 1996

Instructions for the proper application of the data type designators

1. The designators specified in this table should be used to the greatest extent possible to indicate the CREX type of observational data contained within the body of the bulletin.

2. When the table does not contain a suitable designator for the observational data type, an alphabetic designator which is not assigned in the table should be introduced and the WMO Secretariat notified.

3. In the event no standard format has been established for a particular data type, and there is a recommended format, that format is given in square brackets under the column labeled Code Form (e.g. [ASCII]). This is a character code - International Alphabet No.5 (Attachment II-2) will be used.

T2 = S Surface
Designator Data Type Code Form (CREX)
A Land based hourly reports [ASCII]
C Climatic reports [ASCII]
I Land intermediate synoptic reports [ASCII]
M Land based main synoptic reports [ASCII]
N Asynoptic intermediate reports [ASCII]
P Land based hourly specials [ASCII]
R Hydrologic reports [ASCII]
S Floating platforms (ship, buoy, etc.) [ASCII]
X Other surface reports [ASCII]
Z CREX bulletins with mixed data type reports [ASCII]

T2   = U   Upper Air
Designator Data Type Code Form (CREX)
A Single level aircraft reports [ASCII]
B Single level balloon reports [ASCII]
C Single level satellite derived reports [ASCII]
D Dropsondes/dropwindsondes [ASCII]
L Ozone data [ASCII]
N Rocketsondes [ASCII]
P Profiler [ASCII]
R Radiance data [ASCII]
S Radiosonde/pibal [ASCII]
T Satellite derived sondes [ASCII]
X Other upper air reports [ASCII]
Z Mixed upper air data type reports [ASCII]

T2   = O   Oceanographic/Liminographic
Designator Data Type Code Form (CREX)
I Sea ice [ASCII]
S Sea surface and below sounding [ASCII]
T Sea surface temperature [ASCII]
W Sea surface waves [ASCII]
X Other sea environmental [ASCII]
Z Mixed collection of oceanographic types [ASCII]

T2 = F   FORECASTS - Surface/Sea Level
Designator Data Type Code Form (CREX)
A Surface area forecast (e.g. airways) [ASCII]
M Surface forecasts (e.g. MOS) [ASCII]
P Forecast amendments (airways) [ASCII]
R Hydrologic forecasts [ASCII]
S Forecast amendments (TAF) [ASCII]
T Aerodrome forecasts (TAF) [ASCII]
X Other surface forecasts [ASCII]
Z Mixed collection of forecasts [ASCII]

T2 = V   FORECASTS - Upper Air
Designator Data Type Code Form (CREX)
A Single level [ASCII]
S Soundings [ASCII]
X Other upper air forecasts [ASCII]
Z Mixed collection of forecasts [ASCII]
Note: The allocation of abbreviated headings for CREX messates is pending the formal approval of the code CREX.

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     Page last Modified: 23 October, 2013 2:21 PM