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 data are 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 |
Description
|
| TIME |
length of the record from turbulence (fast) data channels
|
| TIME_*** [math]\displaystyle{ ^a }[/math] |
length of the record from slow data channels (if different from fast)
|
| N_SHEAR_SENSORS |
number of shear channels (shear sensors)
|
| N_***_SENSORS [math]\displaystyle{ ^b }[/math] |
number of *** channel (sensors)
|
[math]\displaystyle{ ^a }[/math] Typically TIME is assumed for the fast-sampled microstructure channels. Use, e.g., TIME_SLOW or TIME_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.
Variables
| Variable Name |
Req.[math]\displaystyle{ ^a }[/math] |
Standard Name |
Unit |
Dimensions
|
| TIME |
R |
time |
CF-Convention[math]\displaystyle{ ^b }[/math] |
TIME
|
| SHEAR |
R |
[sea][math]\displaystyle{ ^c }[/math]_water_velocity_shear |
s-1 |
TIME, N_SHEAR_SENSORS
|
| PSPD_REL |
HR |
platform_speed_wrt_[sea][math]\displaystyle{ ^c }[/math]_water |
m s-1 |
TIME
|
| VIB |
HR |
platform_vibration |
- |
TIME, N_VIB_SENSORS
|
| PRES |
HR |
[sea][math]\displaystyle{ ^c }[/math]_water_pressure |
dbar |
TIME
|
| TEMP |
HR |
[sea][math]\displaystyle{ ^c }[/math]_water_temperature |
degree_Celsius |
TIME, N_T_SENSORS
|
| ACC |
O |
platform_acceleration |
m s-2 |
TIME, N_ACC_SENSORS
|
| CNDC |
O |
[sea][math]\displaystyle{ ^c }[/math]_water_electrical_conductivity |
S m-1 |
TIME_CTD, N_C_SENSORS
|
| GRADT |
O |
derivative_of_[sea][math]\displaystyle{ ^c }[/math]_water_temperature_wrt_[math]\displaystyle{ ^{*d} }[/math] |
degree_Celcius m-1 |
TIME, N_GRADT_SENSORS
|
| GRADC |
O |
derivative_of_[sea][math]\displaystyle{ ^c }[/math]_water_conductivity_wrt_[math]\displaystyle{ ^{*d} }[/math] |
- |
TIME, N_GRADC_SENSORS
|
| PITCH |
O |
platform_pitch_angle |
degree |
TIME
|
| ROLL |
O |
platform_roll_angle |
degree |
TIME
|
[math]\displaystyle{ ^a }[/math]: Code for the requirement of variable, R: Required, HR: Highly recommended, O: Optional
[math]\displaystyle{ ^b }[/math]: Unit and offset need to be compatible with the Climate and Forecast (CF)-convention
[math]\displaystyle{ ^c }[/math]: User can choose between water or sea_water depending on the environment
[math]\displaystyle{ ^d }[/math]: wrt_x or wrt_s; spatial derivative. Typically derived from the rate of change of temperature and divided by the profiling speed.
return to Dataset requirements for shear probes
go to next: Level 2 data.
