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 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.

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