Atomix - User contributions [en]

Quality control coding

2022-06-03T20:53:03Z

Amelie Meyer:

'''[In progress]
'''

'''Shear-probe quality-control flags'''

The Q (quality control) flags associated with shear-probe measurements are bitwise flags with boolean values which are CF compliant. More information available here: https://mplnet.gsfc.nasa.gov/about-flags

Every dissipation estimate from every probe must have Q flag.
The numerical values of the Q flags are as follows:

{| class="wikitable"
|-
! Flag Mask
! Bit
! Flag Meaning
! Example threshold value
| Ex: True =1 / False =0
| Ex: Q value
|-
| 1
| Bit 0
| if FOM > FOM_limit
| 2
| 0
| 0
|-
| 2
| Bit 1
| if despike_fraction > despike_fraction_limit
| 40%
| 0
| 0
|-
| 4
| Bit 2
| if |log(e_max)-log(e_min)|> diss_ratio_limit X \sigma_{\ln\varepsilon}
| N/A
| 1
| 4
|-
| 8
| Bit 3
| if despike_iterations > despike_iterations_limit
| To be confirmed
| 0
| 0
|-
| 16
| Bit 4
| if variance resolved less than a threshold
| 50%
| 1
| 16
|-
| 32
| Bit 5
| manual flag to be defined by user
| N/A
| 0
| 0
|-
| 64
| Bit 6
| manual flag to be defined by user
| N/A
| 0
| 0
|-
| 128
| Bit 7
| manual flag to be defined by user
| N/A
| 0
| 0
|-
|
|
|
|
|
| Final Q = 20
|}

 

The Q flags are combined by their addition.
For example a Q value of 20 means that the dissipation estimated failed both dissipation ratio limit test and the resolved variance test.
A value of 255 means that all tests failed.
The reasons for a failure can be decoded by breaking the value of Q down to its powers of 2.

[[Category: Shear probes]]

Quality control coding

2022-06-03T19:54:24Z

Amelie Meyer:

'''[In progress]
'''

'''Shear-probe quality-control flags'''

The Q (quality control) flags associated with shear-probe measurements are not compatible with the Ocean Sites [http://www.oceansites.org/ 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:

{| class="wikitable"
|-
! Flag Mask
! Bit
! Flag Meaning
! Example threshold value
| Ex: True =1 / False =0
| Ex: Q value
|-
| 1
| Bit 0
| if FOM > FOM_limit
| 2
| 0
| 0
|-
| 2
| Bit 1
| if despike_fraction > despike_fraction_limit
| 40%
| 0
| 0
|-
| 4
| Bit 2
| if |log(e_max)-log(e_min)|> diss_ratio_limit X \sigma_{\ln\varepsilon}
| N/A
| 1
| 4
|-
| 8
| Bit 3
| if despike_iterations > despike_iterations_limit
| To be confirmed
| 0
| 0
|-
| 16
| Bit 4
| if variance resolved less than a threshold
| 50%
| 1
| 16
|-
| 32
| Bit 5
| manual flag to be defined by user
| N/A
| 0
| 0
|-
| 64
| Bit 6
| manual flag to be defined by user
| N/A
| 0
| 0
|-
| 128
| Bit 7
| manual flag to be defined by user
| N/A
| 0
| 0
|-
|
|
|
|
|
| Final Q = 20
|}

 

The Q flags are combined by their addition.
For example a Q value of 20 means that the dissipation estimated failed both dissipation ratio limit test and the resolved variance test.
A value of 255 means that all tests failed.
The reasons for a failure can be decoded by breaking the value of Q down to its powers of 2.

[[Category: Shear probes]]

Quality control coding

2022-06-03T19:53:42Z

Amelie Meyer:

'''[In progress]
'''

'''Shear-probe quality-control flags'''

The Q (quality control) flags associated with shear-probe measurements are not compatible with the Ocean Sites [http://www.oceansites.org/ 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:

{| class="wikitable"
|-
! Flag Mask
! Bit
! Flag Meaning
| Example threshold value
| Ex: True =1 / False =0
| Ex: Q value
|-
| 1
| Bit 0
| if FOM > FOM_limit
| 2
| 0
| 0
|-
| 2
| Bit 1
| if despike_fraction > despike_fraction_limit
| 40%
| 0
| 0
|-
| 4
| Bit 2
| if |log(e_max)-log(e_min)|> diss_ratio_limit X \sigma_{\ln\varepsilon}
| N/A
| 1
| 4
|-
| 8
| Bit 3
| if despike_iterations > despike_iterations_limit
| To be confirmed
| 0
| 0
|-
| 16
| Bit 4
| if variance resolved less than a threshold
| 50%
| 1
| 16
|-
| 32
| Bit 5
| manual flag to be defined by user
| N/A
| 0
| 0
|-
| 64
| Bit 6
| manual flag to be defined by user
| N/A
| 0
| 0
|-
| 128
| Bit 7
| manual flag to be defined by user
| N/A
| 0
| 0
|-
|
|
|
|
|
| Final Q = 20
|}

 

The Q flags are combined by their addition.
For example a Q value of 20 means that the dissipation estimated failed both dissipation ratio limit test and the resolved variance test.
A value of 255 means that all tests failed.
The reasons for a failure can be decoded by breaking the value of Q down to its powers of 2.

[[Category: Shear probes]]

Quality control coding

2022-06-03T19:52:40Z

Amelie Meyer:

'''In progress
'''

'''Shear-probe quality-control flags'''

The Q (quality control) flags associated with shear-probe measurements are not compatible with the Ocean Sites [http://www.oceansites.org/ 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:

{| class="wikitable"
|-
! Flag Mask
! Bit
! Flag Meaning
! Example threshold value
! Ex: True =1 / False =0
! Ex: Q value
|-
| 1
| Bit 0
| if FOM > FOM_limit
| 2
| 0
| 0
|-
| 2
| Bit 1
| if despike_fraction > despike_fraction_limit
| 40%
| 0
| 0
|-
| 4
| Bit 2
| if |log(e_max)-log(e_min)|> diss_ratio_limit X \sigma_{\ln\varepsilon}
| N/A
| 1
| 4
|-
| 8
| Bit 3
| if despike_iterations > despike_iterations_limit
| To be confirmed
| 0
| 0
|-
| 16
| Bit 4
| if variance resolved less than a threshold
| 50%
| 1
| 16
|-
| 32
| Bit 5
| manual flag to be defined by user
| N/A
| 0
| 0
|-
| 64
| Bit 6
| manual flag to be defined by user
| N/A
| 0
| 0
|-
| 128
| Bit 7
| manual flag to be defined by user
| N/A
| 0
| 0
|-
|
|
|
|
|
| Final Q = 20
|}

 

The Q flags are combined by their addition.
For example a Q value of 20 means that the dissipation estimated failed both dissipation ratio limit test and the resolved variance test.
A value of 255 means that all tests failed.
The reasons for a failure can be decoded by breaking the value of Q down to its powers of 2.

[[Category: Shear probes]]

Quality control coding

2022-06-03T19:52:02Z

Amelie Meyer:

'''In progress
'''

'''Shear-probe quality-control flags'''

The Q (quality control) flags associated with shear-probe measurements are not compatible with the Ocean Sites [http://www.oceansites.org/ 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:

{| class="wikitable"
|-
! Flag Mask
! Bit
! Flag Meaning
! Example threshold value
! Ex: True =1 / False =0
! Ex: Q value
|-
| 1
| Bit 0
| if FOM > FOM_limit
| 2
| 0
| 0
|-
| 2
| Bit 1
| if despike_fraction > despike_fraction_limit
| 40%
| 0
| 0
|-
| 4
| Bit 2
| if |log(e_max)-log(e_min)|> diss_ratio_limit X \sigma_{\ln\varepsilon}
| N/A
| 1
| 4
|-
| 8
| Bit 3
| if despike_iterations > despike_iterations_limit
| To be confirmed
| 0
| 0
|-
| 16
| Bit 4
| if variance resolved less than a threshold
| 50%
| 1
| 16
|-
| 32
| Bit 5
| manual flag to be defined by user
| N/A
| 0
| 0
|-
| 64
| Bit 6
| manual flag to be defined by user
| N/A
| 0
| 0
|-
| 128
| Bit 7
| manual flag to be defined by user
| N/A
| 0
| 0
|-
| Final Q = 20
|}

 

The Q flags are combined by their addition.
For example a Q value of 20 means that the dissipation estimated failed both dissipation ratio limit test and the resolved variance test.
A value of 255 means that all tests failed.
The reasons for a failure can be decoded by breaking the value of Q down to its powers of 2.

[[Category: Shear probes]]

Quality control coding

2022-06-03T19:51:13Z

Amelie Meyer:

'''In progress
'''

'''Shear-probe quality-control flags'''

The Q (quality control) flags associated with shear-probe measurements are not compatible with the Ocean Sites [http://www.oceansites.org/ 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:

{| class="wikitable"
|-
! Flag Mask
! Bit
! Flag Meaning
! Example threshold value
! Ex: True =1 / False =0
! Ex: Q value
|-
| 1
| Bit 0
| if FOM > FOM_limit
| 2
| 0
| 0
|-
| 2
| Bit 1
| if despike_fraction > despike_fraction_limit
| 40%
| 0
| 0
|-
| 4
| Bit 2
| if |log(e_max)-log(e_min)|> diss_ratio_limit X \sigma_{\ln\varepsilon}
| N/A
| 1
| 4
|-
| 8
| Bit 3
| if despike_iterations > despike_iterations_limit
| To be confirmed
| 0
| 0
|-
| 16
| Bit 4
| if variance resolved less than a threshold
| 50%
| 1
| 16
|-
| 32
| Bit 5
| manual flag to be defined by user
| N/A
| 0
| 0
|-
| 64
| Bit 6
| manual flag to be defined by user
| N/A
| 0
| 0
|-
| 128
| Bit 7
| manual flag to be defined by user
| N/A
| 0
| 0
| Final Q = 20
|}

 

The Q flags are combined by their addition.
For example a Q value of 20 means that the dissipation estimated failed both dissipation ratio limit test and the resolved variance test.
A value of 255 means that all tests failed.
The reasons for a failure can be decoded by breaking the value of Q down to its powers of 2.

[[Category: Shear probes]]

Quality control coding

2022-06-03T19:45:27Z

Amelie Meyer:

'''In progress
'''

'''Shear-probe quality-control flags'''

The Q (quality control) flags associated with shear-probe measurements are not compatible with the Ocean Sites [http://www.oceansites.org/ 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:

{| class="wikitable"
|-
! Flag Mask
! Bit
! Flag Meaning
! Example threshold value
! Ex: True =1 / False =0
|-
| 1
| Bit 0
| if FOM > FOM_limit
| 2
| 0
|-
| 2
| Bit 1
| if despike_fraction > despike_fraction_limit
| 40%
| 0
|-
| 4
| Bit 2
| if |log(e_max)-log(e_min)|> diss_ratio_limit X \sigma_{\ln\varepsilon}
| N/A
| 1
|-
| 8
| Bit 3
| if despike_iterations > despike_iterations_limit
| To be confirmed
| 0
|-
| 16
| Bit 4
| if variance resolved less than a threshold
| 50%
| 1
|-
| 32
| Bit 5
| manual flag to be defined by user
| N/A
| 0
|-
| 64
| Bit 6
| manual flag to be defined by user
| N/A
| 0
|-
| 128
| Bit 7
| manual flag to be defined by user
| 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>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.

[[Category: Shear probes]]

Quality control coding

2022-06-03T19:41:21Z

Amelie Meyer:

'''In progress
'''

'''Shear-probe quality-control flags'''

The Q (quality control) flags associated with shear-probe measurements are not compatible with the Ocean Sites [http://www.oceansites.org/ 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

{| class="wikitable"
|-
! 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
| if |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
| 0
|-
| 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>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.

[[Category: Shear probes]]

Quality control coding

2022-06-03T19:40:30Z

Amelie Meyer:

'''In progress
'''

'''Shear-probe quality-control flags'''

The Q (quality control) flags associated with shear-probe measurements are not compatible with the Ocean Sites [http://www.oceansites.org/ 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

{| class="wikitable"
|-
! 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
| if |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
| 0
|-
| 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>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.

[[Category: Shear probes]]

Quality control coding

2022-06-03T19:39:32Z

Amelie Meyer:

'''In progress
'''

'''Shear-probe quality-control flags'''

The Q (quality control) flags associated with shear-probe measurements are not compatible with the Ocean Sites [http://www.oceansites.org/ 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

{| class="wikitable"
|-
! 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
| if |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
| 0|}
|-
| 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>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.

[[Category: Shear probes]]

Quality control coding

2022-06-03T19:33:28Z

Amelie Meyer:

'''In progress
'''

'''Shear-probe quality-control flags'''

The Q (quality control) flags associated with shear-probe measurements are not compatible with the Ocean Sites [http://www.oceansites.org/ 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

{| class="wikitable"
|-
! Flag Mask
! Flag Meaning
! Bit
! Example threshold value
! Ex: True =1 / False =0
|-
| 1
| if FOM > FOM_limit
| Bit 0
| ?
| 0
|-
| 2
| if despike_fraction > despike_fraction_limit
| Bit 1
| ?
| 0
|-
| 4
| if |log(e_max)-log(e_min)|> diss_ratio_limit X \sigma_{\ln\varepsilon}
| Bit 2
| ?
| 1
|-
| 8
| if despike_iterations > despike_iterations_limit
| Bit 3
| ?
| 0
|-
| 16
| if variance resolved less than a threshold
| Bit 4
| 50%
| 1
|-
| 32
| manual flag to be defined by user
| Bit 5
| ?
| 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>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.

[[Category: Shear probes]]

Quality control coding

2022-06-03T19:22:50Z

Amelie Meyer:

'''In progress
'''

'''Shear-probe quality-control flags'''

The Q (quality control) flags associated with shear-probe measurements are not compatible with the Ocean Sites [http://www.oceansites.org/ 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

{| class="wikitable"
|-
! Flag Mask
! Flag Meaning
! Bit
! Example threshold value
|-
| 1
| if FOM > FOM_limit
| Bit 0
| ?
|-
| 2
| if despike_fraction > despike_fraction_limit
| Bit 1
| ?
|-
| 4
| if |log(e_max)-log(e_min)|> diss_ratio_limit X \sigma_{\ln\varepsilon}
| Bit 2
| ?
|-
| 8
| if despike_iterations > despike_iterations_limit
| Bit 3
| ?
|-
| 16
| if variance resolved less than a threshold
| Bit 4
| 50%
|-
| 32
| manual flag to be defined by user
| Bit 5
| ?
|}

 

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>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.

[[Category: Shear probes]]

Quality control coding

2022-06-03T19:16:27Z

Amelie Meyer:

'''In progress
'''

'''Shear-probe quality-control flags'''

The Q (quality control) flags associated with shear-probe measurements are not compatible with the Ocean Sites [http://www.oceansites.org/ 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

{| class="wikitable"
|-
! Flag Mask
! Flag Meaning
! Bit
! Example threshold value
|-
| 1
| if FOM > FOM_limit
| Bit 0
| ?
|-
| 2
| if despike_fraction > despike_fraction_limit
| Bit 1
| ?
|-
| 4
| if |log(e_max)-log(e_min)|> diss_ratio_limit X \sigma_{\ln\varepsilon}
| Bit 2
| ?
|-
| 8
| if despike_iterations > despike_iterations_limit
| Bit 3
| ?
|-
| 16
| if variance resolved > 50%
| Bit 4
| ?
|-
| 32
| manual flag to be defined by user
| Bit 5
| ?
|}

 

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>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.

[[Category: Shear probes]]

Quality control coding

2022-06-03T19:15:11Z

Amelie Meyer:

'''In progress
'''

'''Shear-probe quality-control flags'''

The Q (quality control) flags associated with shear-probe measurements are not compatible with the Ocean Sites [http://www.oceansites.org/ 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

{| class="wikitable"
|-
! Flag Mask
! Flag Meaning
! Bit
! Example threshold value
|-
| 1
| if FOM > FOM_limit
| Bit 0
| ?
|-
| 2
| if despike_fraction > despike_fraction_limit
| Bit 1
|-
| 4
| if |log(e_max)-log(e_min)|> diss_ratio_limit X \sigma_{\ln\varepsilon}
| Bit 2
|-
| 8
| if despike_iterations > despike_iterations_limit
| Bit 3
|-
| 16
| if variance resolved > 50%
| Bit 4
|-
| 32
| manual flag to be defined by user
| Bit 5
|}

 

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>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.

[[Category: Shear probes]]

Quality control coding

2022-06-03T19:11:25Z

Amelie Meyer:

'''In progress
'''

'''Shear-probe quality-control flags'''

The Q (quality control) flags associated with shear-probe measurements are not compatible with the Ocean Sites [http://www.oceansites.org/ 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

{| class="wikitable"
|-
! Flag
! Meaning
! Bit
|-
| 1
| if FOM > FOM_limit
| Bit 0
|-
| 2
| if despike_fraction > despike_fraction_limit
| Bit 1
|-
| 4
| if |log(e_max)-log(e_min)|> diss_ratio_limit X \sigma_{\ln\varepsilon}
| Bit 2
|-
| 8
| if despike_iterations > despike_iterations_limit
| Bit 3
|-
| 16
| if variance resolved > 50%
| Bit 4
|-
| 32
| manual flag to be defined by user
| Bit 5
|}

 

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>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.

[[Category: Shear probes]]

Quality control coding

2022-06-03T19:08:48Z

Amelie Meyer:

'''In progress
'''

'''Shear-probe quality-control flags'''

The Q (quality control) flags associated with shear-probe measurements are not compatible with the Ocean Sites [http://www.oceansites.org/ 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

{| class="wikitable"
|-
! Flag
! Meaning
! Comment
|-
| 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 to be defined by user
| ?
|}

 

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>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.

[[Category: Shear probes]]

Talk:Quality control coding

2022-06-03T18:58:31Z

Amelie Meyer:

During our shear probe group meeting on March 28, 2022, we discussed the possibility of using a different flagging scheme for the shear probe data. Suggestions were to use a binary system that allows to relate the flagging number to one or more specific data quality control tests that would be unique even if multible quality control tests were failed by the data set. However, this flagging scheme would only apply to our data and international data centres or data display display servers (e.g. https://www.ocean-ops.org/board) would not recognize this.
Perhaps a solution would be to use a two-level scheme, as also suggeted by the Intergovernmental Oceanographic Commission (IOC). On the primary level, we use a common quality flagging as shown below. The secondary level could then be a unique number that points to the quality test the data has failed. The flagging scheme below is taken from a best practice IOC document ([https://repository.oceanbestpractices.org/handle/11329/413 link]). The secondary level could then complement the primary level flags by reporting the results of specific QC tests performed and data processing history. As suggested by IOC best practices "The secondary level content varies in number and description and is chosen by those who implement the scheme, representing information on the applied quality tests (e.g., excessive spike check, regional data range check) and data processing history (e.g., interpolated values, corrected values)."

{| class="wikitable"
|+ IOC Quality flagging primary level
|-
! Value !! Primary-level flag short name !! Definition
|-
|1 || Good || Passed documented required QC tests
|-
| 2 || Not evaluated, not available or unknown || Used for data when no QC test performed or the information on quality is not available
|-
| 3 || Questionable/suspect || Failed non-critical documented metric or subjective test(s)
|-
|4 || Bad || Failed critical documented QC test(s) or as assigned by the data provider
|-
|9 || Missing data || Used as place holder when data are missing
|}

Would that work?

---------------------------
[Below are some old notes from the main page. They might still come in handy at a later stage:
Amelie]

'''Ocean Sites'''
Providing quality-control flags according to Ocean Sites is encouraged.
These are described at [http://www.oceansites.org/ Ocean Sites] for quailty control (QC) coding.
This flagging scheme is mostly compatible with the primary level flagging recommended by [http://www.ioccp.org/images/D4standards/IOC-OceanDataStandards54-3-2013.pdf Intergovernmental Oceanographic Commission of UNESCO (2013)].
However, only the flags of 0, 1, and 4 make sense for dissipation estimates derived from shear-probe data.

{| class="wikitable"
|-
! Flag
! Meaning
! Comment
|-
| 0
| unknown
| No QC was performed.
|-
| 1
| good data
| All QC tests passed.
|-
| 2
| probably good data
| Data have failed one or more QC tests but detailed examination after processing (e.g. by visual examination) suggests data is good.
|-
| 3
| potentially correctable bad data
| These data are not to be used without scientific correction or re-calibration (e.g. uncertain shear sensor sensitivity).
|-
| 4
| bad data
| Data have failed one or more tests.
|-
| 5
| -
| Not used
|-
| 6
| -
| Not used
|-
| 7
| nominal value
| Data were not observed but reported (e.g. instrument target depth.).
|-
| 8
| interpolated value
| Missing data may be interpolated from neighboring data in space or time.
|-
| 9
| missing value
| This is a fill value
|}

 
[Rolf left the stuff below in place because I do not know what to do with it.]

Climate and Forecast Metadata Convention (CF) requires that QC flags carry attributes. In netCDF (Network Common Data Form) data files, the following information for quality control flagging should be provided for each data variable <PARAM>. 
 
<PARAM>_QC 
<PARAM>_QC:long_name = “quality flag of <PARAM>”; 
<PARAM>_QC:conventions = “OceanSITES QC Flags”; 
<PARAM>_QC:flag_values = 0, 1, 2, 3, 4, 7, 8, 9; 
<PARAM>_QC:flag_meanings = “0:unknown 1:good_data 2:probably_good_data 3:potentially_correctable_bad_data 4:bad_data 7:nominal_value 8:interpolated_value 9:missing_value”

Talk:Quality control coding

2022-06-03T18:57:57Z

Amelie Meyer:

During our shear probe group meeting on March 28, 2022, we discussed the possibility of using a different flagging scheme for the shear probe data. Suggestions were to use a binary system that allows to relate the flagging number to one or more specific data quality control tests that would be unique even if multible quality control tests were failed by the data set. However, this flagging scheme would only apply to our data and international data centres or data display display servers (e.g. https://www.ocean-ops.org/board) would not recognize this.
Perhaps a solution would be to use a two-level scheme, as also suggeted by the Intergovernmental Oceanographic Commission (IOC). On the primary level, we use a common quality flagging as shown below. The secondary level could then be a unique number that points to the quality test the data has failed. The flagging scheme below is taken from a best practice IOC document ([https://repository.oceanbestpractices.org/handle/11329/413 link]). The secondary level could then complement the primary level flags by reporting the results of specific QC tests performed and data processing history. As suggested by IOC best practices "The secondary level content varies in number and description and is chosen by those who implement the scheme, representing information on the applied quality tests (e.g., excessive spike check, regional data range check) and data processing history (e.g., interpolated values, corrected values)."

{| class="wikitable"
|+ IOC Quality flagging primary level
|-
! Value !! Primary-level flag short name !! Definition
|-
|1 || Good || Passed documented required QC tests
|-
| 2 || Not evaluated, not available or unknown || Used for data when no QC test performed or the information on quality is not available
|-
| 3 || Questionable/suspect || Failed non-critical documented metric or subjective test(s)
|-
|4 || Bad || Failed critical documented QC test(s) or as assigned by the data provider
|-
|9 || Missing data || Used as place holder when data are missing
|}

Would that work?

---------------------------
Below are some old notes from the main page. They might still come in handy at a later stage:
[Amelie]

'''Ocean Sites'''
Providing quality-control flags according to Ocean Sites is encouraged.
These are described at [http://www.oceansites.org/ Ocean Sites] for quailty control (QC) coding.
This flagging scheme is mostly compatible with the primary level flagging recommended by [http://www.ioccp.org/images/D4standards/IOC-OceanDataStandards54-3-2013.pdf Intergovernmental Oceanographic Commission of UNESCO (2013)].
However, only the flags of 0, 1, and 4 make sense for dissipation estimates derived from shear-probe data.

{| class="wikitable"
|-
! Flag
! Meaning
! Comment
|-
| 0
| unknown
| No QC was performed.
|-
| 1
| good data
| All QC tests passed.
|-
| 2
| probably good data
| Data have failed one or more QC tests but detailed examination after processing (e.g. by visual examination) suggests data is good.
|-
| 3
| potentially correctable bad data
| These data are not to be used without scientific correction or re-calibration (e.g. uncertain shear sensor sensitivity).
|-
| 4
| bad data
| Data have failed one or more tests.
|-
| 5
| -
| Not used
|-
| 6
| -
| Not used
|-
| 7
| nominal value
| Data were not observed but reported (e.g. instrument target depth.).
|-
| 8
| interpolated value
| Missing data may be interpolated from neighboring data in space or time.
|-
| 9
| missing value
| This is a fill value
|}

 
[Rolf left the stuff below in place because I do not know what to do with it.]

Climate and Forecast Metadata Convention (CF) requires that QC flags carry attributes. In netCDF (Network Common Data Form) data files, the following information for quality control flagging should be provided for each data variable <PARAM>. 
 
<PARAM>_QC 
<PARAM>_QC:long_name = “quality flag of <PARAM>”; 
<PARAM>_QC:conventions = “OceanSITES QC Flags”; 
<PARAM>_QC:flag_values = 0, 1, 2, 3, 4, 7, 8, 9; 
<PARAM>_QC:flag_meanings = “0:unknown 1:good_data 2:probably_good_data 3:potentially_correctable_bad_data 4:bad_data 7:nominal_value 8:interpolated_value 9:missing_value”