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This happens for stepType of "max" and "min". Unfortunately edition 1 does not support maximum and minimum in its "Time Range Indicator" table (Table 5). So ECMWF invented its own centre-specific combination to support this. There is no such issue in GRIB edition 2.
To see this let's try setting the stepType key on a GRIB file whose centre is not ECMWF:
Code Block |
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% grib_ls -p centre,edition my.grib1
centre edition
consensus 1
# Set its stepType to max
% ECCODES_DEBUG=-1 grib_set -s stepType=max my.grib1 max.grib1
ECCODES DEBUG grib_set_string stepType=|max|
ECCODES DEBUG grib_set_long timeRangeIndicator=2
ECCODES DEBUG grib_set_long centre=98
% grib_ls -p centre,stepType max.grib1
centre stepType
ecmf max |
Here we turn on the debugging to see what other keys get set when we change the stepType. We can see that the centre got changed to "98" (=ecmwf).
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