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The tigge_check can do also very some basic quality control by checking the allowed value ranges for each parameter (with -v option) . Some allowed ranges can become obsolete at some point e.g. due to model upgrade to higher resolution meaning in general different values of some parameters. if they were defined. There is another newer better maintainable tool doing similar basic quality check called grib_check.py (. Read more information about both tools in Data quality checking tools (python source code is available there).
The There is a further tool grib_enc_check.py can be also which is used for data encoding check of another more recent project LC-WFV (Lead Centre for Wave Forecast Verification). The encoding checking is not as comprehensive as in tigge_check e.g. geometry checks are missing completely. Also this tool is not part of ecCodes yet as it is still under development.
Examples of tigge_check usage
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Checking S2S reforecast data
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Examples of grib_enc_check.py usage
grib_enc_check.py options
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# BIN=/home/ma/emos/def/lcwfv/bin
python $BIN/grib_enc_check.py
usage: grib_enc_check.py [-h] [-v VERBOSITY] [-d DEFS]
[inp_file [inp_file ...]]
positional arguments:
inp_file enter input file name(s)
optional arguments:
-h, --help show this help message and exit
-v VERBOSITY, --verbosity VERBOSITY
increase output verbosity [0-2]
-d DEFS, --defs DEFS path to definition files |
Checking LC-WVF data
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$BIN/grib_enc_check.py lw.grib2 field 223(Mean wave direction) key: dataRepresentationTemplateNumber expected: <0..2> encoded: 40 field 224(10 metre U wind component) key: dataRepresentationTemplateNumber expected: <0..2> encoded: 40 Number of error(s) found: 2 |
Performance tip to speed up checking big files
There is a new tool (ecCodes v>=2.6.0) called codes_split_file which is useful for parallellising decoding/checking tasks like tigge_check.
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set -e # Assume you have 8 cores codes_split_file 8 my_big.grib # Now you will have my_big.grib_01, my_big.grib_02, ... my_big.grib_08 for f in my_big.grib_*; do # Run check in the background. Now multiple processes are running in parallel tigge_check $f & done # With the 'wait' command you can force the execution of the script to pause until a # all background jobs have finished executing before continuing the execution # of your script wait # Now clean up the split files rm -f my_big.grib_* |
Examples of grib_check.py usage
grib_check.py options
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python $BIN/grib_check.py
usage: grib_check.py [-h] [-v VERBOSITY] [-w] [-his] [-l [LISTING]]
[inp_file [inp_file ...]]
positional arguments:
inp_file enter input file name(s)
optional arguments:
-h, --help show this help message and exit
-v VERBOSITY, --verbosity VERBOSITY
increase output verbosity [0-2]
-w, --warning warnings are treated as errors..
-his, --history add value ranges history, if exists, to listing..
-l [LISTING], --listing [LISTING]
list defined parameters (search if argument provided!) |
Checking LC-WVF data
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$BIN/grib_check.py lw.grib2
field 223(Mean wave direction) key: dataRepresentationTemplateNumber expected: <0..2> encoded: 40
field 224(10 metre U wind component) key: dataRepresentationTemplateNumber expected: <0..2> encoded: 40
Number of error(s) found: 2 |
List defined limits for a parameter
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python /home/ma/emos/def/lcwfv/bin/grib_check.py -l 131
131 [U component of wind] [min <-250, 5> max <1, 250>] (default)
[min <-150, -10> max <10, 150>] (levtype:pv)
[min <-250, 5> max <-250, 250>] (class:s2, origin:rksl) |