vcal_baseline - bruno-beloff/scs_mfr GitHub Wiki
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DESCRIPTION
The vcal_baseline utility is used to adjust the zero offset of the reported vCal value. A positive offset value cause the output to be higher.
In normal circumstances, the vCal offset should be set so that the minimum vCal value for the given gas on the given device matches the minimum vCal value in the model compendium.
Important note: the vCal baseline does not change the vCal value as reported by the gases_sampler utility. Instead, it is used by the gas exegesis system, as part of the preprocessing of data that is passed to the interpretation model.
Each sensor is identified by the gas that it detects. For example, a nitrogen dioxide sensor is identified as NO2, and an ozone sensor is identified as Ox.
Note that the greengrass processes must be restarted for changes to take effect.
SYNOPSIS
vcal_baseline.py [{ -b GAS | { { -s | -o } GAS VALUE [-r SAMPLE_REC -t SAMPLE_TEMP -m SAMPLE_HUMID] } | -d }] [-v]
| Options | |
|---|---|
| --version | show program's version number and exit |
| -h, --help | show this help message and exit |
| -b BASELINE, --baseline=BASELINE | report offset for GAS |
| -s SET, --set=SET | set offset for GAS to integer VALUE |
| -o OFFSET, --offset=OFFSET | change offset for GAS, by integer VALUE |
| -d, --delete | delete the baseline configuration |
| -r SAMPLE_REC, --sample-rec=SAMPLE_REC | sample ISO 8601 datetime |
| -t SAMPLE_TEMP, --sample-temp=SAMPLE_TEMP | sample temperature |
| -m SAMPLE_HUMID, --sample-humid=SAMPLE_HUMID | sample humidity |
| -i INDENT, --indent=INDENT | pretty-print the output with INDENT |
| -v, --verbose | report narrative to stderr |
EXAMPLES
./vcal_baseline.py -s NO2 16
FILES
~/SCS/conf/vcal_baseline.json
DOCUMENT EXAMPLE
{"NO2": {"calibrated-on": "2022-06-23T08:40:06Z", "offset": 134, "env": null}}