|
|
| Line 7: |
Line 7: |
| <br> | | <br> |
| {| class="wikitable sortable" | | {| class="wikitable sortable" |
| ! Dimension short name | | ! Dimension short name !! description |
| ! description | |
| |- | | |- |
| | TIME_SPECTRA | | | TIME_SPECTRA || length of the record of average times of spectral segments |
| | Time axis for the spectral estimates | |
| |- | | |- |
| |N_SHEAR_SENSORS | | |N_SHEAR_SENSORS ||number of shear channels (shear sensors) |
| |number of shear channels | |
| |} | | |} |
| </div> | | </div> |
Revision as of 20:15, 25 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 |
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 |
|
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_FLAGS [math]\displaystyle{ ^a }[/math] |
dissipation_qc_flags |
dimensionaless |
[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 |
dimensionless |
[TIME_SPECTRA, N_SHEAR_SENSORS]
|
| MAD |
mean_absolute_deviation |
dimensionless |
[TIME_SPECTRA, N_SHEAR_SENSORS]
|
| VAR_RESOLVED |
variance_resolved |
dimensionless |
[TIME_SPECTRA, N_SHEAR_SENSORS]
|
| EPSI_STD |
standard_deviation_of_kinetic_ energy_dissipation_estimate |
dimensionless |
[TIME_SPECTRA, N_SHEAR_SENSORS]
|
Return Dataset requirements for shear probes.
