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MARS

The forecast time step in hours from the forecast base time:

step=<value>

E.g. fields specified with type=fc, time=12, step=6 verify at 18:00 on the same forecast base date. 

Examples:

step=240                           # step 240

step=6/12/18/24        # steps 6, 12, 18, 24

step=6/to/24/by/6 # steps 6, 12, 18, 24

step=12-36                     # a step range to specify a product valid for the step interval 12 - 36

The step also specifies the length of the forecast which verifies at First Guess time.

Dissemination

The forecast time step in hours from the forecast base time.

step=<value>

Valid values are hours (HH) from forecast base time.

Examples:

step=240                            # step 240

step=6/12/18/24         # steps 6, 12, 18, 24

step=6/to/24/by/6 # steps 6, 12, 18, 24

step=12-36                     # a step range to specify a product valid for the step interval 12 - 36

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