Use grib_ls to inspect the contents of the file tp.grib1, printing also the paramId with the –P option: | No Format |
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$> grib_ls -P paramId tp.grib1
tp.grib1
paramId edition centre typeOfLevel level dataDate stepRange dataType shortName packingType gridType
142 1 ecmf surface 0 20170221 24 fc lsp grid_simple regular_ll
1 of 1 messages in tp.grib1
1 of 1 total messages in 1 files |
Alternatively, you could inspect the parameter namesapce namespace with grib_ls: | No Format |
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$> grib_ls -n parameter tp.grib1
tp.grib1
centre paramId units name shortName
ecmf 142 m Large-scale precipitation lsp
1 of 1 messages in tp.grib1
1 of 1 total messages in 1 files |
The shortName is set to lsp and paramId to 142, i.e., large-scale precipitation. | Info |
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The field was created using MARS compute to sum the convective and large-scale (stratiform) precipitation. When using MARS compute, the output field maintains the information from the GRIB header of the first input field so, in this case, we see that the field has paramId 142 even though the message is now supposed to contain the total precipitation. |
To change the parameter to total precipitation, use grib_set as follows: | No Format |
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$> grib_set -s shortName=tp tp.grib1 tp_new.grib1 |
Check with grib_ls: | No Format |
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$> grib_ls -P paramId tp_new.grib1
tp_new.grib1
paramId edition centre typeOfLevel level dataDate stepRange dataType shortName packingType gridType
228 1 ecmf surface 0 20170221 24 fc tp grid_simple regular_ll
1 of 1 messages in tp_new.grib1
1 of 1 total messages in 1 files |
| Tip |
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Note that changing the shortName has also changed the value of paramId. The same could be achieved by setting paramId=228: | No Format |
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$> grib_set -s paramId=228 tp.grib tp_new.grib |
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