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Excerpt taken from: WMO No. 386 Manual on the Global Telecommunication System
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| (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) |
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