Level 2 data (shear probes): Difference between revisions

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{| class="wikitable sortable"
{| class="wikitable sortable"
! Dimension short name
! Dimension short name !! description
! description
|-
|-
| TIME
| TIME <math>^b</math> || length of the record from turbulence (fast) data channels
| Time axis for the microstructure sampling rate
|-
|-
|N_SHEAR_SENSORS
|N_SHEAR_SENSORS ||number of shear channel (shear sensors)
|number of shear channel
|-
|-
|N_***_SENSORS
|N_***_SENSORS <math>^b</math>  ||number of *** channel (sensors)
|number of *** channels, such as ACC or VIB
|-
|-
|}
|}
<math>^a</math> At this level platform speed must be provided. We require that this is given at the shear probe time (not TIME_SLOW or TIME_CTD. Please interpolate if needed.
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<math>^b</math> Please use these examples for related sensors:
N_VIB_SENSORS for vibration (piezo-acceleration) sensors <br>
N_ACC_SENSORS for vibration acceleration sensors
N_GRADT_SENSORS for thermistors <br>
N_GRADC_SENSORS for microconductivity sensors  <br>
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=Required Variables=
=Required Variables=

Revision as of 20:11, 25 May 2022

Level 2 data are the full resolution, cleaned and despiked parameters from level 1. The initial data set is subdivided in sections and labeled accordingly in the parameter SECTION_NUMBER with integers. Level 2 data is ready for estimating spectra. In addition to cleaned and despiked level 1 data channels, level 2 data comprises the additional parameter summarized in the table below.

It is important that the platform speed with respect to water, as used in the dissipation estimates, is included in this level. Also note that the shear probe time series (and optionally acceleration and vibration) must be cleaned and filtered as needed at this level, and will not be altered further when estimating dissipation rates.

On all levels, "sea_water" in the standard name can be replaced by "water" for limnologic applications.

Dimensions


Dimension short name description
TIME [math]\displaystyle{ ^b }[/math] length of the record from turbulence (fast) data channels
N_SHEAR_SENSORS number of shear channel (shear sensors)
N_***_SENSORS [math]\displaystyle{ ^b }[/math] number of *** channel (sensors)

[math]\displaystyle{ ^a }[/math] At this level platform speed must be provided. We require that this is given at the shear probe time (not TIME_SLOW or TIME_CTD. Please interpolate if needed.
[math]\displaystyle{ ^b }[/math] Please use these examples for related sensors: N_VIB_SENSORS for vibration (piezo-acceleration) sensors
N_ACC_SENSORS for vibration acceleration sensors N_GRADT_SENSORS for thermistors
N_GRADC_SENSORS for microconductivity sensors



Required Variables


Parameter Name Standard Name Units of measurement dimension
SECTION_NUMBER dimensionless TIME
TIME time Days since YYYY-MM-DDT00:00:00Z TIME
SHEAR sea_water_velocity_shear s-1 [TIME, N_SHEAR_SENSORS]
PSPD_REL platform_speed_wrt_sea_water m s-1 TIME

Optional Level 2 Variables


Parameter Name Standard Name Units of measurement dimension
VIB platform_vibration NA [TIME, N_VIB_SENSORS]
ACC platform_acceleration m s-2 [TIME [math]\displaystyle{ ^a }[/math], N_ACC_SENSORS]

[math]\displaystyle{ ^a }[/math] If using TIME_SLOW or TIME_ACC, this must be provided in addition to the TIME record.

Return Dataset requirements for shear probes
go to next: Level 3 data.

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