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 parameter are defined along a new time dimension, TIME_SPECTRA, which is the average time of the individual spectral segments. The length of the TIME_SPECTRA dimension equals the number of spectral segments. Parameter for the calculation of the spectra, e.g. segment length, are provided in the meta data. Repeated level 1 and 2 parameter are provided as average over the segment length.

Parameter Name	CF parameter	Standard Name	Units of measurement	dimension	Comment
FLOWPS	0	flow_past_sensor	m s-1	TIME_SPECTRA
PRES	1 0	sea_water_pressure water_pressure	dbar	TIME_SPECTRA
TIME	1	time	days since 1950-01-01 00:00:00 UTC	TIME_SPECTRA
TEMP	1 0	sea_water_temperature water_temperature	degree_Celsius	TIME_SPECTRA
SECTION_NUMBER	0		dimensionless	TIME_SPECTRA
SH_SPEC		shear_probe_spectrum	s-2 cpm-1	[TIME_SPECTRA, WAVENUMBER, n_shear_sensors]	from shear probes (dirty)
SH_SPEC_CLEAN		shear_probe_spectrum_clean	s-2 cpm-1	[TIME_SPECTRA, WAVENUMBER, n_shear_sensors]	cleaned using Goodman algorithm
A_SPEC		acceleration_sensor_spectrum	m2 s-4 cpm-1	[TIME_SPECTRA, WAVENUMBER, n_acc_sensors]
AP_SPEC		vibration_sensor_spectrum	NA	[TIME_SPECTRA, WAVENUMBER, n_vibration_sensors]
SH_A_SPEC		Complex cross-spectral matrix of shear and acceleration		[TIME_SPECTRA, WAVENUMBER, ???]
SH_AP_SPEC		Complex cross-spectral matrix of shear and vibrations		[TIME_SPECTRA, WAVENUMBER, ???]
KCYC		Cyclic wavenumber	cpm	WAVENUMBER
KMAX		maximum_wavenumber	cpm	TIME_SPEC	maximum wavenumber for integration of shear spectrum