...

The dataset is covering the period from 1 Nov 2015 until present 16 Dec 2015 (status on 8 Mar 2016).

MARS

If you have access to ECMWF systems you can retrieve test data from MARS archive using these keywords:

class=mc
expver=0067

...

#!/usr/bin/env python
from ecmwfapi import ECMWFDataServer
server = ECMWFDataServer()
server.retrieve({
    "dataset": "cams_nrealtime_test",
    "stream": "oper",
    "type": "fc",
    "date": "20151101/to/20151130",
    "time": "00",    
    "step":"0/to/120/by/1",
    "levtype":"sfc",
    "param" : "aod550",       # see parameter table at http://macc.copernicus-atmosphere.eu/oper_info/global_nrt_data_access/ftp/20150911_cams_upgrade/
    "grid": "0.4/0.4",        # 0.4˘ x 0.4˘ regular lat-lon grid
    "area": "70/-35/35/60",   # N/E/S/W area boundaries
    "format": "netcdf",
    "target": "/tmp/cams_nrealtime_test.grib"
})

ECPDS dissemination

 The dataset will be made available through operational ECPDS dissemination. The list of parameters will be the same as in the current global data stream but at the higher horizontal resolution.

If everything else fails ...

... you can always contact us by using this contact form putting "Request for CAMS global test dataset" as a subject and specify:

• which parameters you requireand levels
• which time period
• forecast step / time frequency
• which geographical area
• which data format you require