Level 1 data (shear probes): Difference between revisions

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=Optional Level 1 Variables=
 
=Highly-recommended Level 1 Variables=
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| PSPD_REL ||  platform_speed_wrt_sea_water || m s-1 || TIME <math>^a</math>
| PSPD_REL ||  platform_speed_wrt_sea_water || m s-1 || TIME <math>^a</math>
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| VIB<math>^b</math> || platform_vibration || NA || [TIME, N_VIB_SENSORS]
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| PRES || sea_water_pressure<br /> (water_pressure) || dbar || [TIME <math>^a</math>]
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| TEMP || sea_water_temperature<br /> (water_temperature) || degree_Celsius || [TIME <math>^a</math>, N_T_SENSORS]
|}
<math>^a</math> or TIME_SLOW or TIME_CTD
<br><math>^b</math> or ACC (see Table for optional variables)
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=Optional Level 1 Variables=
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! Parameter Name !! Standard Name !! Units of measurement !! dimension
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| VIB || platform_vibration || NA || [TIME, N_VIB_SENSORS]  
| VIB || platform_vibration || NA || [TIME, N_VIB_SENSORS]  
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| ACC || platform_acceleration || m s-2 || [TIME <math>^b</math>, N_ACC_SENSORS]  
| ACC || platform_acceleration || m s-2 || [TIME <math>^b</math>, N_ACC_SENSORS]  
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| TEMP || sea_water_temperature<br /> (water_temperature) || degree_Celsius || [TIME_CTD <math>^b</math>, N_T_SENSORS]
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| CNCD || sea_water_electrical_conductivity<br /> (water_electrical_conductivity) || S m-1 || [TIME_CTD <math>^b</math>, N_C_SENSORS]  
| CNCD || sea_water_electrical_conductivity<br /> (water_electrical_conductivity) || S m-1 || [TIME_CTD <math>^b</math>, N_C_SENSORS]  

Revision as of 08:34, 9 January 2023


Level 1 data refers to the full resolution data in physical units, e.g. the regularly sampled time series of converted shear probe data. If needed, a transfer function for shear is given. Below, a table with parameters included in the level 1 data set is compiled. The parameter names and definitions fit the NetCDF parameter attributes and data is stored as a NetCDF group with the name "L1_converted".

In the standard names, "sea_water" can be replaced with "water" if working in freshwater environments. This is specified in some entries below but not all.


Dimensions


Dimension short name description
TIME length of the record from turbulence (fast) data channels
TIME_*** [math]\displaystyle{ ^a }[/math] length of the record from the *** sensor (e.g., CTD or SLOW)
N_SHEAR_SENSORS number of shear channel (shear sensors)
N_***_SENSORS [math]\displaystyle{ ^b }[/math] number of *** channel (sensors)

[math]\displaystyle{ ^a }[/math] Typically we assume TIME for the fast-sampled microstructure channels, and for example, _SLOW or _CTD for slower sampled channels such as CTD and tilt sensors. If the application requires different time stamps for different sensors, this can be utilized like TIME_PITCH, TIME_ACC etc.
[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
TIME time CF-Conventions compatible offset[math]\displaystyle{ ^a }[/math] TIME
SHEAR sea_water_velocity_shear
(or water_velocity_shear)		 s-1 [TIME, N_SHEAR_SENSORS]

[math]\displaystyle{ ^a }[/math] i.e. "Days since YYYY-MM-DDT00:00:00Z"


Highly-recommended Level 1 Variables


Parameter Name Standard Name Units of measurement dimension
PSPD_REL platform_speed_wrt_sea_water m s-1 TIME [math]\displaystyle{ ^a }[/math]
VIB[math]\displaystyle{ ^b }[/math] platform_vibration NA [TIME, N_VIB_SENSORS]
PRES sea_water_pressure
(water_pressure)		 dbar [TIME [math]\displaystyle{ ^a }[/math]]
TEMP sea_water_temperature
(water_temperature)		 degree_Celsius [TIME [math]\displaystyle{ ^a }[/math], N_T_SENSORS]

[math]\displaystyle{ ^a }[/math] or TIME_SLOW or TIME_CTD
[math]\displaystyle{ ^b }[/math] or ACC (see Table for optional variables)

Optional Level 1 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{ ^b }[/math], N_ACC_SENSORS]
CNCD sea_water_electrical_conductivity
(water_electrical_conductivity)		 S m-1 [TIME_CTD [math]\displaystyle{ ^b }[/math], N_C_SENSORS]
GRADT temperature_gradient [TIME, N_GRADT_SENSORS]
GRADC conductivity_gradient [TIME, N_GRADC_SENSORS]
PITCH platform_pitch_angle degree TIME [math]\displaystyle{ ^a }[/math]
ROLL platform_roll_angle degree TIME [math]\displaystyle{ ^a }[/math]

[math]\displaystyle{ ^a }[/math] or TIME_SLOW or TIME_CTD
[math]\displaystyle{ ^b }[/math] or TIME_SLOW


return to Dataset requirements for shear probes
go to next: Level 2 data.

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