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Naming convention

The following dissemination filename convention is used for the transmission of ECMWF dissemination products:

ccSMMDDHHIImmddhhiiE where:

cc is Dissemination stream name
S is dissemination data stream indicator
MMDDHHII is month, day, hour and minute on which the products are based
mmddhhii is month, day, hour and minute on which the products are valid at
- ddhhii is set to “______” for Seasonal Forecasting System products
- ii is set to 01 for high resolution forecast time step zero, type=fc, step=0
E is the Experiment Version Number’ (as EXPVER in MARS, normally 1)

S	Description
A	HRES Weather Parameter products
B	ENS Weather Parameter products
C	Tropical Cyclone high resolution trajectory forecast products (HRES)
D	High resolution forecast products - atmospheric data (HRES)
E	Ensemble forecast products- atmospheric data (ENS)
F	Extended range forecast products - atmospheric data (ENS-extended)
G	Ensemble forecast products - high-frequency wave data (ENS-WAM)
H	Extended range re-forecast products - atmospheric data
L	Seasonal forecasting system products - atmospheric data (SEAS)
N	Seasonal forecasting system products - wave data (SEAS-WAM)
O	Ensemble forecast overlap data
P	High resolution forecast - wave data (HRES-WAM)
Q	High resolution forecast - high-frequency wave data (HRES-WAM)
S	High resolution forecast - high-frequency atmospheric data (HRES)
T	Tropical Cyclone ensemble trajectory forecast products (ENS)
U	Ensemble forecast post-processed products - wave data (e.g. ensemble means, extreme forecast indices)
V	Extended range forecast products - wave data (ENS-WAM-extended)
W	Ensemble forecast products - wave data (ENS-WAM)
X	Ensemble forecast products - high-frequency atmospheric data (ENS)
Y	Ensemble forecast post-processed products - atmospheric data (e.g. ensemble means, extreme forecast indices)
Z	Extended range re-forecast products - wave data

Most products are encoded in WMO FM-92 GRIB edition 1, unless otherwise specified in our Catalogue of Real-time products

Product subset I-i-c (High Resolution Atmospheric model), III-i-c (Ensemble Atmospheric model): Model level parameters encoded in WMO FM-92 GRIB edition 2
Product subsets I-ii, III-iv (Time Series of Weather Parameters) and Products subsets I-iii, III-viii (Tropical Cyclones), encoded in WMO FM-94 BUFR

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