2015-04-27

Hungary's SYNOP BUFR contained operator 208035 before std sequence

On 16 April, ECMWF reported that SYNOP BUFR reported by Hungary contained operator 2-08-035 before the standard sequence 3-07-080.  The operator affects the length of the first string element in the sequence, namely the name of station.
Everybody in the expert team IPET-DRMM shared the view that it is not plausible style of work, but this is not explicitly prohibited by the B/C1 regulation.  I've made a question to ECMWF about what is acceptable for them, since it is also not nice to BUFR implementors worldwide to comment after their work.  I hope it will serve as good rule of thumb:

 - a B/C template without extension, i.e. the section 2 consists of single sequence only.
 - a B/C template followed by other descriptors
 - if the extension contains local number, that must come with local table version number more than zero

On 22 April, ECMWF reported that Hungary changed their way of reporting.

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