Level 4 data (shear probes): Difference between revisions

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| TIME || time || Days since YYYY-MM-DDT00:00:00Z || TIME_SPECTRA  
| TIME || time || Days since YYYY-MM-DDT00:00:00Z || TIME_SPECTRA  
|-
|-
| SECTION_NUMBER || || dimensionless || TIME_SPECTRA
| SECTION_NUMBER || || - || TIME_SPECTRA
|-
|-
| PSPD_REL || flow_past_sensor || m s-1 || TIME_SPECTRA ||
| PSPD_REL || flow_past_sensor || m s-1 || TIME_SPECTRA ||
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| KMAX || maximum_wavenumber_used_for_estimating_ turbulent_kinetic_energy_dissipation || cpm || [TIME_SPECTRA, N_SHEAR_SENSORS]
| KMAX || maximum_wavenumber_used_for_estimating_ turbulent_kinetic_energy_dissipation || cpm || [TIME_SPECTRA, N_SHEAR_SENSORS]
|-
|-
| EPSI_FLAGS <math>^a</math> || dissipation_qc_flags || dimensionless || [TIME_SPECTRA, N_SHEAR_SENSORS]
| EPSI_FLAGS <math>^a</math> || dissipation_qc_flags || - || [TIME_SPECTRA, N_SHEAR_SENSORS]
|}
|}
<math>^a</math> Quality control coding for the final dissipation estimate
<math>^a</math> Quality control coding for the final dissipation estimate

Revision as of 13:27, 4 June 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 length of the record of average times of spectral segments
N_SHEAR_SENSORS number of shear channels (shear sensors)

Required Variables


Parameter Name Standard Name Units of measurement dimensions
TIME time Days since YYYY-MM-DDT00:00:00Z TIME_SPECTRA
SECTION_NUMBER - 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_FLAGS [math]\displaystyle{ ^a }[/math] dissipation_qc_flags - [TIME_SPECTRA, N_SHEAR_SENSORS]

[math]\displaystyle{ ^a }[/math] Quality control coding for the final dissipation estimate

Optional Level 4 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 - [TIME_SPECTRA, N_SHEAR_SENSORS]
MAD mean_absolute_deviation - [TIME_SPECTRA, N_SHEAR_SENSORS]
VAR_RESOLVED variance_resolved - [TIME_SPECTRA, N_SHEAR_SENSORS]
KMIN minimum_wavenumber_used_for_estimating_ turbulent_kinetic_energy_dissipation cpm [TIME_SPECTRA, N_SHEAR_SENSORS]
EPSI_STD standard_deviation_of_kinetic_ energy_dissipation_estimate - [TIME_SPECTRA, N_SHEAR_SENSORS]



Return Dataset requirements for shear probes.