n | Meaning | Real-time comment | Delayed-mode comment | qartod flag | qartod meaning
-- | -- | -- | -- | -- | --
0 | No QC is performed | No QC is performed. | No QC is performed. | 2 | Not evaluated
1 | Good data | Good data. All Argo real-time QC tests passed. These measurements are good within the limits of the Argo real-time QC tests. | Good data. No adjustment is needed, or the adjusted value is statistically consistent with good quality reference data. An error estimate is supplied. | 1 | Pass
2 | Probably good data | Probably good data. These measurements are to be used with caution. | Probably good data. Delayed-mode evaluation is based on insufficient information. An error estimate is supplied. | 3 | Suspect or Of High Interest
3 | Probably bad data that are potentially adjustable | Probably bad data. These measurements are not to be used without scientific adjustment, e.g. data affected by sensor drift but may be adjusted in delayed-mode. | Probably bad data. An adjustment may (or may not) have been applied, but the value may still be bad. An error estimate is supplied. | 3 | Suspect or Of High Interest
4 | Bad data | Bad data. These measurements are not to be used. A flag '4' indicates that a relevant real-time qc test has failed. A flag '4' may also be assigned for bad measurements that are known to be not adjustable, e.g. due to sensor failure. | Bad data. Not adjustable. Adjusted data are replaced by FillValue. | 4 | Fail
5 | Value changed | Value changed | Value changed | 1 | Pass
6 | Not used | Not used | Not used | - | -
7 | Not used | Not used | Not used | - | -
8 | Estimated value | Estimated value (interpolated, extrapolated or other estimation). | Estimated value (interpolated, extrapolated or other estimation). | 1 | Pass
9 | Missing value | Missing value. Data parameter will record FillValue. | Missing value. Data parameter will record FillValue. | 9 | Missing data
‘ ‘ | FillValue | Empty space in NetCDF file. | Empty space in NetCDF file. | - | -
Argo QC flags are documented in RR2 and RD2 reference tables. Qartoq QC flags scale is documented in http://dx.doi.org/10.25923/w8y6-d298
RR2 and RD2 Argo QC flags should be mapped to Qartod QC flag.
Here is the mapping proposal
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n | Meaning | Real-time comment | Delayed-mode comment | qartod flag | qartod meaning -- | -- | -- | -- | -- | -- 0 | No QC is performed | No QC is performed. | No QC is performed. | 2 | Not evaluated 1 | Good data | Good data. All Argo real-time QC tests passed. These measurements are good within the limits of the Argo real-time QC tests. | Good data. No adjustment is needed, or the adjusted value is statistically consistent with good quality reference data. An error estimate is supplied. | 1 | Pass 2 | Probably good data | Probably good data. These measurements are to be used with caution. | Probably good data. Delayed-mode evaluation is based on insufficient information. An error estimate is supplied. | 3 | Suspect or Of High Interest 3 | Probably bad data that are potentially adjustable | Probably bad data. These measurements are not to be used without scientific adjustment, e.g. data affected by sensor drift but may be adjusted in delayed-mode. | Probably bad data. An adjustment may (or may not) have been applied, but the value may still be bad. An error estimate is supplied. | 3 | Suspect or Of High Interest 4 | Bad data | Bad data. These measurements are not to be used. A flag '4' indicates that a relevant real-time qc test has failed. A flag '4' may also be assigned for bad measurements that are known to be not adjustable, e.g. due to sensor failure. | Bad data. Not adjustable. Adjusted data are replaced by FillValue. | 4 | Fail 5 | Value changed | Value changed | Value changed | 1 | Pass 6 | Not used | Not used | Not used | - | - 7 | Not used | Not used | Not used | - | - 8 | Estimated value | Estimated value (interpolated, extrapolated or other estimation). | Estimated value (interpolated, extrapolated or other estimation). | 1 | Pass 9 | Missing value | Missing value. Data parameter will record FillValue. | Missing value. Data parameter will record FillValue. | 9 | Missing data ‘ ‘ | FillValue | Empty space in NetCDF file. | Empty space in NetCDF file. | - | -