wgrib2: -varX
Introduction
The -varX option writes a raw variable name. It
shows the discipline, master table, local table, center, parameter category
and parameter number. The default format is
var{discipline}_{master table}_{local table}_{center}_{parameter_category}_{parameter}
ex. var0_10_1_57_1_51
discipline = 0
master table = 10
local table = 1
parameter category = 1
parameter = 51
When you use verbose mode > 0 (-v, -v2, -v98, -v99), then the format
of -varX changes to
(WMO defined variables)
ex. var discipline=0 master_table=2 parmcat=2 parm=3
For locally defined variables, the local table is important and the format is
ex. var discipline=0 local_table=1 center=7 parmcat=1 parm=195
One would use the -varX option when
the built-in tables have a problem. For example, suppose SGP
is a new parameter this is not in your version of wgrib2.
However, you want to write a script that will extract SGP
and work with both the
old and future versions of wgrib2. By using
-varX, your inventories will have a variable
name that is the same in both versions of wgrib2. The varX name
has been added to the match_inventory (2.0.2 3/2015) and is
understood by -set_var and -set_metadata (2.0.7 12/2017).
Usage
-varX
Example
$ wgrib2 test.grb2 -varX
1:0:var0_2_1_7_3_5
See also: -var
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