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Introduction
This is a brief introduction of the main request parameter syntax.
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MARS Request explanation
Identification Keywords
https://softwareconfluence.ecmwf.int/wiki/display/UDOC/Identification+keywords
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#Specifies the ECMWF classification given to the data class=ei, #Identifies the forecasting system used to generated the data when the same meteorological types are archived stream=oper, #Is the version of the data, 1 is OPERATIONAL expver=1, #Denotes type of level levtype=sfc, #Meteorological parameter param=165.128/41.128, #Determines the type of field to be retrieved: type=an, |
Date and Time Keywords
https://softwareconfluence.ecmwf.int/wiki/display/UDOC/Date+and+time+keywords
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#Specifies the forecast time step from forecast base time step=0, #Base time time=00, #Specifies the Analysis date, the Forecast base date or Observations date date=2013-09-01/to/2013-09-30, |
Post Processing Keywords
https://softwareconfluence.ecmwf.int/wiki/display/UDOC/Post-processing+keywords
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#Output grid mesh grid=0.75/0.75, #Area area=75/-15/30/42.5, |
Data Storage Keywords
https://softwareconfluence.ecmwf.int/wiki/display/UDOC/Data+storage+keywords
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#specifies a Unix file into which data is to be written after retrieval
target="ei_sfc_165_41.grib",
##OPTIONAL MARS SERVICE KEYWORD
#(Optional) argument to retrieve NetCDF format
format=netcdf,
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You can find all the keyword explanation in our Mars Keywords page.
There is an extra keyword that you can use in Access MARS that does not appear in the MARS Documentation:
| Keyword | definition |
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| format | You can add format = netcdf to retrieve the data in NetCDF format. |