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=Dimensions=
=Dimensions=
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=Required Variables=
=Required Variables=
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=Optional Level 3 Variables=
=Optional Level 3 Variables=
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Revision as of 11:20, 7 May 2022
Level 3 data contains the raw (and optionally cleaned) spectra derived from level 2 time series. 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 .
Dimensions Expand
TIME_SPECTRA
Time axis for the spectral estimates
WAVENUMBER
Wavenumber for spectral estimates
N_SHEAR_SENSORS
number of shear channels
N_***_SENSORS
number of *** channels (such as ACC and VIB)
Required Variables Expand
TIME
time
YYYY-MM-DDT00:00:00Z
TIME_SPECTRA
SECTION_NUMBER
dimensionless
TIME_SPECTRA
SH_SPEC
shear_probe_spectrum
s-2 cpm-1
[TIME_SPECTRA, WAVENUMBER, N_SHEAR_SENSORS]
KCYC
Cyclic wavenumber
cpm
WAVENUMBER
Optional Level 3 Variables Expand
PSPD_REL
platform_speed_wrt_sea_water
m s-1
TIME_SPECTRA
PRES
water_pressure
dbar
TIME_SPECTRA
SH_SPEC_CLEAN
shear_probe_spectrum_clean
s-2 cpm-1
[TIME_SPECTRA, WAVENUMBER, N_SHEAR_SENSORS]
A_SPEC
acceleration_sensor_spectrum
m2 s-4 cpm-1
[TIME_SPECTRA, WAVENUMBER, N_ACCEL_SENSORS]
AP_SPEC
vibration_sensor_spectrum
NA
[TIME_SPECTRA, WAVENUMBER, N_VIB_SENSORS]
SH_A_SPEC
shear_and_acceleration_cross-spectral_matrix
[TIME_SPECTRA, WAVENUMBER, N_ACCEL_SENSORS*N_SHEAR_SENSORS]
SH_AP_SPEC
shear_and_vibration_cross-spectral_matrix
[TIME_SPECTRA, WAVENUMBER, N_VIB_SENSORS*N_SHEAR_SENSORS]
Return Dataset requirements for shear probes .
