SMHI SWEDEN
Norrkoping, 26 November 2020

SMHI Routing Catalogue lists from which channel a certain bulletin is allowed to be recieved from. 
As a bulletin sometimes can be transmitted on more than one channel, these bulletins are included 
several times with different CCCC's in field no 2 "GTS circuit from which the bulletin is received".

One example of this is ISMD40 LIIB:
"ISMD40 LIIB","EDZW","EFKL","ESWI","EYHM","UMRR","XXXX"
"ISMD40 LIIB","RUMS","EFKL","ESWI","EYHM","UMRR","XXXX"

In the Routing Catalogue you will find two kind of undefined CCCC. These are:

XXXX: This is used when the bulletin is sent to an internal or a national system, and not to an 
international center within WMO GTS.
****: This declares that we have no CCCC for the channel. Examples of these are AFTN and AMHS-channels.


If you have any questions about SMHI Routing Catalogue, please contact us at rth@smhi.se