Level 1 data (shear probes)
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.
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 | Time axis for the microstructure sampling rate |
| TIME_CTD | Time axis for the CTD sampling rate. |
| TIME_*** [math]\displaystyle{ ^a }[/math] | Time axis for the *** sensor sampling rate |
| N_SHEAR_SENSORS | number of shear channel |
| N_***_SENSORS | number of *** channel (e.g., N_VIB_SENSORS, N_ACC_SENSORS) |
[math]\displaystyle{ ^a }[/math] Typically we assume TIME for the fast-sampled microstructure channels, and eventually _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.
Required Variables
| Parameter Name | Standard Name | Units of measurement | dimension |
|---|---|---|---|
| TIME | time | Days since YYYY-MM-DDT00:00:00Z | TIME |
| SHEAR | sea_water_velocity_shear (or water_velocity_shear) |
s-1 | [TIME, N_SHEAR_SENSORS] |
Optional 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 | platform_vibration | NA | [TIME, N_VIB_SENSORS] |
| ACC | platform_acceleration | m s-2 | [TIME [math]\displaystyle{ ^b }[/math], N_ACC_SENSORS] |
| TEMP | sea_water_temperature (water_temperature) |
degree_Celsius | [TIME_CTD [math]\displaystyle{ ^b }[/math], N_T_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 (shear probes)]| Level 2 data].
