Level 3 data (shear probes)

Level 3 data (shear probes)

Level 3 data contains the raw and cleaned spectra derived from level 2 data. Level 3 parameters are defined along a new TIME dimension, which is the average time of the individual spectral segments. The length of the TIME dimension equals the number of spectral segments. Parameter for the calculation of the spectra, e.g. segment length, are provided in the meta data.

Parameter Name	Standard Name	Units of measurement	dimension	Comment
FLOWPS	flow_past_sensor	m s-1	TIME
PRES	water_pressure	dbar	TIME
TIME	time	days since 1950-01-01 00:00:00 UTC	TIME
TEMP	water_temperature	degree_Celsius	TIME
SECTION_NUMBER		dimensionless	TIME
SH_SPEC	shear_probe_spectrum	s-2 cpm-1	[TIME, WAVENUMBER, N_SHEAR_SENSORS]	from shear probes (dirty)
SH_SPEC_CLEAN	shear_probe_spectrum_clean	s-2 cpm-1	[TIME, WAVENUMBER, N_SHEAR_SENSORS]	cleaned using Goodman algorithm
A_SPEC	acceleration_sensor_spectrum	m2 s-4 cpm-1	[TIME, WAVENUMBER, N_ACCEL_SENSORS]
AP_SPEC	vibration_sensor_spectrum	NA	[TIME, WAVENUMBER, N_VIB_SENSORS]
SH_A_SPEC	shear_and_acceleration_cross-spectral_matrix		[TIME, WAVENUMBER, N_ACCEL_SENSORS*N_SHEAR_SENSORS]
SH_AP_SPEC	shear_and_vibration_cross-spectral_matrix		[TIME, WAVENUMBER, N_VIB_SENSORS*N_SHEAR_SENSORS]
KCYC	Cyclic wavenumber	cpm	WAVENUMBER
KMAX	maximum_wavenumber	cpm	TIME	maximum wavenumber for integration of shear spectrum

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Return Dataset requirements for shear probes.