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In this page the announcements or intention of switching off a set of TAC data will be listed and relevant documents linked or attached.

Note that there should be overlap of TAC and BUFR reports and that at least two months' notice of the withdrawal of TAC should be provided (eg via METNOs).  ECMWF and other monitoring centres will then check the quality and completeness of the BUFR data and provide feedback if necessary (although if many countries give notice at the same time this would stretch monitoring resources).  For more information see



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  1. Just wondering if the list of TAC data from the UK Met Office will appear here shortly... Judy (from CMC)