Introduction
This is a brief introduction of the main request parameter syntax.
We recommend that you get familiar with datasets and their availability using http://apps.ecmwf.int/datasets/
You can also get the request syntax using "View MARS request" feature.
Syntax
verb,
keyword1 = value1,
... = value2,
keywordN = valueN
- verb: action to be taken (e.g. retrieve, list, read)
- keyword: a known MARS variable, e.g. type or date
- value: value assigned to the keyword, e.g. Analysis or temperature
Retrieve example from "View MARS request":
MARS request retrieve, stream=oper, levtype=sfc, param=165.128/41.128, "dataset"=interim, step=0, grid=0.75/0.75, time=00, date=2013-09-01/to/2013-09-30, type=an, class=ei | Python equivalence #!/usr/bin/env python
from ecmwfapi import ECMWFDataServer
server = ECMWFDataServer()
server.retrieve({
'dataset' : "interim",
'time' : "00",
'date' : "2013-09-01/to/2013-09-30",
'step' : "0",
'type' : "an",
'levtype' : "sfc",
'param' : "165.128/41.128",
'grid' : "0.75/0.75",
'target' : "interim201309.grib"
})
|
Keyword
In the Dataset service there is an extra mandatory keyword called dataset which does not appear in normal MARS requests.
| Keyword | definition |
|---|---|
| dataset | See Available Datasets |
the other possible MARS keywords are explained in the MARS keywords documentation.