Level 3 data (shear probes): Difference between revisions

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{| class="wikitable sortable"
{| class="wikitable sortable"
! Short name
! Dimension short name
! Standard name
! description
! description
|-
|-
| TIME
| TIME_SPECTRA
| Days since YYYY-MM-DDT00:00:00Z
| Time axis for the spectral estimates
| Time axis for the microstructure sampling rate
|-
|-
| TIME_CTD
| WAVENUMBER
| Days since YYYY-MM-DDT00:00:00Z
| Wavenumber for spectral estimates
| Time axis for the CTD sampling rate.
|-
| TIME_***
| Days since YYYY-MM-DDT00:00:00Z
| Time axis for the *** sensor sampling rate
|-
|-
|N_SHEAR_SENSORS
|N_SHEAR_SENSORS
|number of shear channel
|number of shear channel
|
|-
|-
|N_***_SENSORS
|N_***_SENSORS
|number of *** channel
|number of *** channel (such as acceleration and vibration)
|
|-
|-
|}
|}
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! Parameter Name !! Standard Name !! Units of measurement !! dimension  
! Parameter Name !! Standard Name !! Units of measurement !! dimension  
|-
|-
| TIME || time || YYYY-MM-DDT00:00:00Z || TIME
| TIME || time || YYYY-MM-DDT00:00:00Z || TIME_SPECTRA
|-
|-
| SECTION_NUMBER || || dimensionless || TIME
| SECTION_NUMBER || || dimensionless || TIME_SPECTRA
|-
|-
| SH_SPEC || shear_probe_spectrum || s-2 cpm-1 || [TIME, WAVENUMBER, N_SHEAR_SENSORS]  
| SH_SPEC || shear_probe_spectrum || s-2 cpm-1 || [TIME_SPECTRA, WAVENUMBER, N_SHEAR_SENSORS]  
|-
|-
| KCYC || Cyclic wavenumber || cpm || WAVENUMBER  
| KCYC || Cyclic wavenumber || cpm || WAVENUMBER  
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! Parameter Name !! Standard Name !! Units of measurement !! dimension  
! Parameter Name !! Standard Name !! Units of measurement !! dimension  
|-
|-
| PSPD_REL ||  platform_speed_wrt_sea_water || m s-1 || TIME
| PSPD_REL ||  platform_speed_wrt_sea_water || m s-1 || TIME_SPECTRA
|-
|-
| PRES ||  water_pressure || dbar || TIME
| PRES ||  water_pressure || dbar || TIME_SPECTRA
|-
|-
| SH_SPEC_CLEAN || shear_probe_spectrum_clean || s-2 cpm-1 || [TIME, WAVENUMBER, N_SHEAR_SENSORS]  
| SH_SPEC_CLEAN || shear_probe_spectrum_clean || s-2 cpm-1 || [TIME_SPECTRA, WAVENUMBER, N_SHEAR_SENSORS]  
|-
|-
| A_SPEC || acceleration_sensor_spectrum || m2 s-4 cpm-1 || [TIME, WAVENUMBER, N_ACCEL_SENSORS]  
| A_SPEC || acceleration_sensor_spectrum || m2 s-4 cpm-1 || [TIME_SPECTRA, WAVENUMBER, N_ACCEL_SENSORS]  
|-
|-
| AP_SPEC || vibration_sensor_spectrum || NA || [TIME, WAVENUMBER, N_VIB_SENSORS]  
| AP_SPEC || vibration_sensor_spectrum || NA || [TIME_SPECTRA, WAVENUMBER, N_VIB_SENSORS]  
|-
|-
| SH_A_SPEC ||shear_and_acceleration_cross-spectral_matrix || || [TIME, WAVENUMBER, N_ACCEL_SENSORS*N_SHEAR_SENSORS]  
| SH_A_SPEC ||shear_and_acceleration_cross-spectral_matrix || || [TIME_SPECTRA, WAVENUMBER, N_ACCEL_SENSORS*N_SHEAR_SENSORS]  
|-
|-
| SH_AP_SPEC || shear_and_vibration_cross-spectral_matrix || || [TIME, WAVENUMBER, N_VIB_SENSORS*N_SHEAR_SENSORS]   
| SH_AP_SPEC || shear_and_vibration_cross-spectral_matrix || || [TIME_SPECTRA, WAVENUMBER, N_VIB_SENSORS*N_SHEAR_SENSORS]   
|}
|}


Revision as of 10:31, 7 May 2022

Level 3 data (shear probes)

Level 3 data contains the raw and cleaned spectra derived from level 2 data. Level 3 parameters are defined along a new TIME dimension, which is the average time of the individual spectral segments. The length of the TIME dimension equals the number of spectral segments. Parameter for the calculation of the spectra, e.g. segment length, are provided in the meta data.


Dimensions

Dimension short name description
TIME_SPECTRA Time axis for the spectral estimates
WAVENUMBER Wavenumber for spectral estimates
N_SHEAR_SENSORS number of shear channel
N_***_SENSORS number of *** channel (such as acceleration and vibration)


Required Variables

Parameter Name Standard Name Units of measurement dimension
TIME time YYYY-MM-DDT00:00:00Z TIME_SPECTRA
SECTION_NUMBER dimensionless TIME_SPECTRA
SH_SPEC shear_probe_spectrum s-2 cpm-1 [TIME_SPECTRA, WAVENUMBER, N_SHEAR_SENSORS]
KCYC Cyclic wavenumber cpm WAVENUMBER

Optional Level 1 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
SH_SPEC_CLEAN shear_probe_spectrum_clean s-2 cpm-1 [TIME_SPECTRA, WAVENUMBER, N_SHEAR_SENSORS]
A_SPEC acceleration_sensor_spectrum m2 s-4 cpm-1 [TIME_SPECTRA, WAVENUMBER, N_ACCEL_SENSORS]
AP_SPEC vibration_sensor_spectrum NA [TIME_SPECTRA, WAVENUMBER, N_VIB_SENSORS]
SH_A_SPEC shear_and_acceleration_cross-spectral_matrix [TIME_SPECTRA, WAVENUMBER, N_ACCEL_SENSORS*N_SHEAR_SENSORS]
SH_AP_SPEC shear_and_vibration_cross-spectral_matrix [TIME_SPECTRA, WAVENUMBER, N_VIB_SENSORS*N_SHEAR_SENSORS]

Return Dataset requirements for shear probes.

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