Table C3

World Meteorological Organization

WMO>WWW >WWW Operational Information Service (OIS)> Telecommunications Abbreviated Heading - TAAii CCCC

Explanation of Data Designators T1T2A1A2ii CCCC

TABLE C3

Geographical area designator A1 (when T1 = D, G, H, O, P, Q, T or Y) and
geographical area designator A2 (when T1 = I or K)

Instructions for the proper application of the level designators

(1)	The designator specified in this table should be used to the greatest extent possible to indicate the geographical area of the data contained within the text of the bulletin.
(2)	Where the geographical area of the data does not correspond exactly with the designator, the designator for the area most approximating that of the data may be used.
(3)	When the table does not contain a suitable designator for the geographical area, an alphabetic designator which is not assigned in the table should be introduced and the WMO Secretariat notified.

	Note: For T1T2= SZ, A1A2 area designator from Table C1 should be used.

A1	Geographical Area Designator
A	0° - 90°W northern hemisphere
B	90°W - 180° northern hemisphere
C	180° - 90°E northern hemisphere
D	90°E - 0° northern hemisphere
E	0° - 90°W tropical belt
F	90°W - 180° tropical belt
G	180° - 90°E tropical belt
H	90°E - 0° tropical belt
I	0° - 90°W southern hemisphere
J	90°W - 180° southern hemisphere
K	180° - 90°E southern hemisphere
L	90°E - 0° southern hemisphere
N	Northern hemisphere
S	Southern hemisphere
T	45°W - 180° northern hemisphere
X	Global Area (area not definable)

WORLD WEATHER WATCH

Reports of Meetings

OPERATIONAL INFORMATION SERVICE

Telecommunications Abbreaviated Heading
TTAAii CCCC

Symbolic Structure explained

Table Definitions

© World Meteorological Organization , 7bis, avenue de la Paix, Case postale No. 2300, CH-1211 Geneva 2, Switzerland - Tel.: +41(0)22 730 81 11 - Fax: +41(0)22 730 81 81