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Ensure any updates on the existing page in UDOC are incorporated on this page before it goes live. Real-time data - file naming convention & format
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)
Dissemination data stream indicator
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 |
File format
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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