MARS

Identifies the experiment or model version.

expver=<value>

Each model run or research experiment is assigned a version number. Operational data is assigned 1 (or 2), pre-operational test data ..., 75, 76,... and IFS research experiments run by ECMWF or by Member States have a four character experiment identifier.

Examples:

expver=1         # Operational data

expver=69       # IFS cycle 41r2 test data

expver=bd1f    # IFS research experiment bd1f

Dissemination

Identifies the model version.

expver=<value>

Production data is usually assigned 1. Experimental or pre-operational test data in dissemination, as available, will be given other numbers.

Examples:

expver=1         # Operational data, default

expver=69       # IFS cycle 41r2 test data