This page has been revised as of to introduce the new naming convention for AIFS data available via dissemination. AIFS data was released via dissemination in April 2024. |
Naming convention - IFS data
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 | Stream & Type (where applicable) |
|---|---|---|
| A | HRES Weather Parameter products (10-day) | stream=oper, type=wp |
| B | ENS Weather Parameter products (15-day) | stream=enfo, type=wp |
| C | Tropical Cyclone high resolution trajectory forecast products (HRES) (10-day) | stream=oper/scda, type=tf |
| D | High resolution forecast products - atmospheric data (HRES) (10-day) | stream=oper (also scda for 06/18 if requested) |
| E | Ensemble forecast products- atmospheric data (ENS) (15-day) | stream=enfo (00/06/12/18) |
| F | Extended range forecast products - atmospheric data (ENS-extended) (46-day) | stream=eefo (was enfo) |
| G | Ensemble forecast products - high-frequency wave data (ENS-WAM) (15-day) | stream=waef |
| H | Extended range re-forecast products - atmospheric data (ENS-extended) (46-day) | stream=eefh/eehs (was enfh/efhs) |
| I | Ensemble re-forecast products - atmospheric data (ENS) (15-day) | stream=enfh/efhs (new) |
| J | Ensemble re-forecast products - wave data (ENS) (15-day) | stream=enwh/wehs (new) |
| L | Seasonal forecasting system products - atmospheric data (SEAS) | stream=mmsm/mmsf/mmsa |
| N | Seasonal forecasting system products - wave data (SEAS-WAM) | stream=wasf |
| P | High resolution forecast - wave data (HRES-WAM) (10-day) | stream=wave (00/12) |
| Q | High resolution forecast - high-frequency wave data (HRES-WAM) (10-day) | stream=scwv (06/18) |
| S | High resolution forecast - high-frequency atmospheric data (HRES) (10-day) | stream=scda |
| T | Tropical Cyclone ensemble trajectory forecast products (ENS) | stream=enfo, type=tf |
| U | Ensemble forecast post-processed products - wave data (e.g. ensemble means, extreme forecast indices) | stream=waef, type=em/efi/sot/ep |
| V | Extended range forecast products - wave data (ENS-WAM-extended) (46-day) | stream=weef (was waef) |
| W | Ensemble forecast products - wave data (ENS-WAM) (15-day) | stream=waef |
| X | Ensemble forecast products - high-frequency atmospheric data (ENS) (15-day) | stream=enfo |
| Y | Ensemble forecast post-processed products - atmospheric data (e.g. ensemble means, extreme forecast indices) | stream=enfo, type=em/efi/sot/ep |
| Z | Extended range re-forecast products - wave data | stream=weeh/wees (was enwh/wehs) |
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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