Level 4 data (shear probes): Difference between revisions
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Level 4 data include the final dissipation estimates as time series, as well as indicators for the quality and accuracy of the estimates and additional derived parameters. Each dissipation estimate in level 4 corresponds to a spectrum in the level 3 data. Consequently, the level 3 and 4 TIME dimensions are | Level 4 data include the final dissipation estimates as time series, as well as indicators for the quality and accuracy of the estimates and additional derived parameters. Each dissipation estimate in level 4 corresponds to a spectrum in the level 3 data. Consequently, the level 3 and 4 TIME dimensions are the same. Parameter EPSI_FINAL is the final dissipation rate estimate, averaged of the selected estimates (using the [[Quality_control_coding | QC flags]]) at that depth. | ||
=Dimensions= | |||
<div class="mw-collapsible mw-collapsed" data-collapsetext="Collapse" data-expandtext="Expand"> | |||
<br> | |||
{| class="wikitable sortable" | |||
! Dimension short name | |||
! description | |||
|- | |||
| TIME_SPECTRA | |||
| Time axis for the spectral estimates | |||
|- | |||
|N_SHEAR_SENSORS | |||
|number of shear channels | |||
|} | |||
</div> | |||
=Required Variables= | |||
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<br> | |||
{| class="wikitable sortable" | {| class="wikitable sortable" | ||
|- | |- | ||
! Parameter Name !! Standard Name !! Units of measurement !! dimensions | ! Parameter Name !! Standard Name !! Units of measurement !! dimensions | ||
|- | |- | ||
| TIME || time || | | TIME || time || Days since YYYY-MM-DDT00:00:00Z || TIME_SPECTRA | ||
|- | |||
| SECTION_NUMBER || || dimensionless || TIME_SPECTRA | |||
|- | |||
| PSPD_REL || flow_past_sensor || m s-1 || TIME_SPECTRA || | |||
|- | |||
| EPSI || specific_turbulent_kinetic_energy_dissipation_in_water || W kg-1 || [TIME_SPECTRA, N_SHEAR_SENSORS] | |||
|- | |||
| EPSI_FINAL || specific_turbulent_kinetic_energy_dissipation_in_water || W kg-1 || TIME_SPECTRA | |||
|- | |- | ||
| | | KMAX || maximum_wavenumber_used_for_estimating_turbulent_kinetic_energy_dissipation || cpm || [TIME_SPECTRA, N_SHEAR_SENSORS] | ||
|- | |- | ||
| | | EPSI_FINAL_QC <math>^a</math> || dissipation_qc_flag || dimensionaless || TIME_SPECTRA | ||
|} | |||
<math>^a</math> Quality control coding for the final dissipation estimate | |||
</div> | |||
=Optional Level 3 Variables= | |||
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<br> | |||
{| class="wikitable sortable" | |||
|- | |- | ||
! Parameter Name !! Standard Name !! Units of measurement !! dimension | |||
|- | |- | ||
| PSPD_REL || | | PSPD_REL || platform_speed_wrt_sea_water || m s-1 || TIME_SPECTRA | ||
|- | |- | ||
| | | PRES || water_pressure || dbar || TIME_SPECTRA | ||
|- | |- | ||
| | | KVISC || kinematic_viscosity_of_water || m2 s-1 || TIME_SPECTRA | ||
|- | |- | ||
| | | FOM || figure_of_merit || dimensionless || [TIME_SPECTRA, N_SHEAR_SENSORS] | ||
|- | |- | ||
| | | MAD || mean_absolute_deviation || ||[TIME_SPECTRA, N_SHEAR_SENSORS] | ||
|- | |- | ||
| | | GOOD_PROBE <math>^a</math> || probe_flag || dimensionless ||TIME_SPECTRA | ||
|} | |} | ||
</div> | |||
<math>^a</math> probes used for the final estimate of dissipation rate (e.g., 1:shear probe 1, 2: shear probe 2, 3:both shear probes | |||
----- | ----- | ||
Return [[Dataset requirements for shear probes]]. | Return [[Dataset requirements for shear probes]]. | ||
[[Category:Shear probes]] | [[Category:Shear probes]] | ||
Revision as of 11:44, 7 May 2022
Level 4 data include the final dissipation estimates as time series, as well as indicators for the quality and accuracy of the estimates and additional derived parameters. Each dissipation estimate in level 4 corresponds to a spectrum in the level 3 data. Consequently, the level 3 and 4 TIME dimensions are the same. Parameter EPSI_FINAL is the final dissipation rate estimate, averaged of the selected estimates (using the QC flags) at that depth.
Dimensions
| Dimension short name | description |
|---|---|
| TIME_SPECTRA | Time axis for the spectral estimates |
| N_SHEAR_SENSORS | number of shear channels |
Required Variables
| Parameter Name | Standard Name | Units of measurement | dimensions | |
|---|---|---|---|---|
| TIME | time | Days since YYYY-MM-DDT00:00:00Z | TIME_SPECTRA | |
| SECTION_NUMBER | dimensionless | TIME_SPECTRA | ||
| PSPD_REL | flow_past_sensor | m s-1 | TIME_SPECTRA | |
| EPSI | specific_turbulent_kinetic_energy_dissipation_in_water | W kg-1 | [TIME_SPECTRA, N_SHEAR_SENSORS] | |
| EPSI_FINAL | specific_turbulent_kinetic_energy_dissipation_in_water | W kg-1 | TIME_SPECTRA | |
| KMAX | maximum_wavenumber_used_for_estimating_turbulent_kinetic_energy_dissipation | cpm | [TIME_SPECTRA, N_SHEAR_SENSORS] | |
| EPSI_FINAL_QC [math]\displaystyle{ ^a }[/math] | dissipation_qc_flag | dimensionaless | TIME_SPECTRA |
[math]\displaystyle{ ^a }[/math] Quality control coding for the final dissipation estimate
Optional Level 3 Variables
| Parameter Name | Standard Name | Units of measurement | dimension |
|---|---|---|---|
| PSPD_REL | platform_speed_wrt_sea_water | m s-1 | TIME_SPECTRA |
| PRES | water_pressure | dbar | TIME_SPECTRA |
| KVISC | kinematic_viscosity_of_water | m2 s-1 | TIME_SPECTRA |
| FOM | figure_of_merit | dimensionless | [TIME_SPECTRA, N_SHEAR_SENSORS] |
| MAD | mean_absolute_deviation | [TIME_SPECTRA, N_SHEAR_SENSORS] | |
| GOOD_PROBE [math]\displaystyle{ ^a }[/math] | probe_flag | dimensionless | TIME_SPECTRA |
[math]\displaystyle{ ^a }[/math] probes used for the final estimate of dissipation rate (e.g., 1:shear probe 1, 2: shear probe 2, 3:both shear probes
