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
    • mmddhhii 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 Weather Parameter products
B Ensemble Weather Parameter products,
C Tropical Cyclone high resolution trajectory forecast products
D High Resolution HRES
E Ensemble forecast products (control and perturbed forecast);
F Monthly Forecast real time atmospheric data
H Monthly re-forecast atmospheric data
L Seasonal Forecasting System products
M High Resolution Stand Alone Wave model (HRES-SAW)
O Ensemble Forecast Overlap data
P Wave Model couple with the HSER (HRES-WAM)
Q Boundary Condition WAVE Project products;
S Boundary Condition Project products;
T Tropical Cyclone ENS trajectory forecast products
U Wave Ensemble derived products (other then control and perturbed forecast);
V Monthly Forecast real time wave data
W Wave Ensemble products;
Y Ensemble derived products (other then control and perturbed forecast)
Z Monthly re-forecast wave data

 

File format

Products are encoded in WMO FM-92 GRIB edition 1 except expect for the following products subsets:

  • Product subset I-i-c : Model level parameters of the High Resolution Atmospheric Model, 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