Quality control coding: Difference between revisions
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Amelie Meyer (talk | contribs) No edit summary |
Amelie Meyer (talk | contribs) No edit summary |
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| Line 29: | Line 29: | ||
| if FOM > FOM_limit | | if FOM > FOM_limit | ||
| Bit 0 | | Bit 0 | ||
| | | 2 | ||
| 0 | | 0 | ||
|- | |- | ||
| Line 35: | Line 35: | ||
| if despike_fraction > despike_fraction_limit | | if despike_fraction > despike_fraction_limit | ||
| Bit 1 | | Bit 1 | ||
| | | 40% | ||
| 0 | | 0 | ||
|- | |- | ||
| Line 41: | Line 41: | ||
| if |log(e_max)-log(e_min)|> diss_ratio_limit X \sigma_{\ln\varepsilon} | | if |log(e_max)-log(e_min)|> diss_ratio_limit X \sigma_{\ln\varepsilon} | ||
| Bit 2 | | Bit 2 | ||
| | | N/A | ||
| 1 | | 1 | ||
|- | |- | ||
| Line 47: | Line 47: | ||
| if despike_iterations > despike_iterations_limit | | if despike_iterations > despike_iterations_limit | ||
| Bit 3 | | Bit 3 | ||
| | | To be confirmed | ||
| 0 | | 0 | ||
|- | |- | ||
| Line 59: | Line 59: | ||
| manual flag to be defined by user | | manual flag to be defined by user | ||
| Bit 5 | | Bit 5 | ||
| | | N/A | ||
| 0 | |||
|- | |||
| 64 | |||
| manual flag to be defined by user | |||
| Bit 6 | |||
| N/A | |||
| 0|} | |||
|- | |||
| 128 | |||
| manual flag to be defined by user | |||
| Bit 7 | |||
| N/A | |||
| 0 | | 0 | ||
<br /> | <br /> | ||
Revision as of 19:39, 3 June 2022
In progress
Shear-probe quality-control flags
The Q (quality control) flags associated with shear-probe measurements are not compatible with the Ocean Sites Ocean Sites for quality control (QC) coding.
Every dissipation estimate from every probe must have Q flag. The numerical values of the Q flags are as follows:
1, if FOM > FOM_limit
2, if despike_fraction > despike_fraction_limit
4, if |log(e_max)-log(e_min)|> diss_ratio_limit X \sigma_{\ln\varepsilon}
8, if despike_iterations > despike_iterations_limit
16, if variance resolved > 50%
32, manual flag defined by user
| Flag Mask | Flag Meaning | Bit | Example threshold value | Ex: True =1 / False =0 |
|---|---|---|---|---|
| 1 | if FOM > FOM_limit | Bit 0 | 2 | 0 |
| 2 | if despike_fraction > despike_fraction_limit | Bit 1 | 40% | 0 |
| 4 | log(e_max)-log(e_min)|> diss_ratio_limit X \sigma_{\ln\varepsilon} | Bit 2 | N/A | 1 |
| 8 | if despike_iterations > despike_iterations_limit | Bit 3 | To be confirmed | 0 |
| 16 | if variance resolved less than a threshold | Bit 4 | 50% | 1 |
| 32 | manual flag to be defined by user | Bit 5 | N/A | 0 |
| 64 | manual flag to be defined by user | Bit 6 | N/A | } |
| 128 | manual flag to be defined by user | Bit 7 | N/A | 0
The Q flags are combined by their addition. For example a Q value of 3 means that the dissipation estimated failed both FOM_limit test and the despike_fraction test. A value of 15 means that all tests failed. A failure of any one test ([math]\displaystyle{ Q\ne0 }[/math]) means that a dissipation test should not be trusted. The reasons for a failure can be decoded by breaking the value of Q down to its powers of 2. |
