Appendix 1: System parameters
Available parameters
Tables 1 to 6, describe all the parameters that are measured and calculated by the Wave-
Guide Onboard system.
Name Description Unit
heaveRadar Instantaneous uncompensated water level cm
heaveIMU Instantaneous radar position along vertical line cm
heaveWOB Instantaneous ship motion compensated water level cm
Table 1: Raw data, heaveRadar, heaveWOB and heaveIMU at 10Hz
Name Description Unit
Czz5 Energy density spectrum from 0 to 500 [mHz] in steps of 5 [mHz] (101 values) cm
2
/Hz
WTBH Table of wave heights cm
WTBT Table of wave periods s
Czz10 Energy density spectrum from 0 to 500 [mHz] in steps of 10 [mHz] (51 values) cm
2
/Hz
Table 2: Spectra and wave tables
Name Description Unit
Hm0 Significant wave height from M0 cm
M0 Band energy from Czz10(f) in the range f =[30-500] mHz cm
2
M0_M Band energy from Czz10(f) in the range f =[30-1000] mHz cm
2
Hm0_M Significant wave height from M0_M cm
Tm02 Average period from M0 and M2 in the range f=[30-500] mHz s
Tm02_M Average period from M0 and M2 in the range f =[30-1000] mHz s
TE0 Band energy from Czz10(f) in the range f =[500-1000] mHz cm
2
TE1 Band energy from Czz10(f) in the range f =[200-500] mHz cm
2
TE1_M Band energy from Czz10(f) in the range f =[200-1000] mHz cm
2
TE2 Band energy from Czz10(f) in the range f =[100-200] mHz cm
2
HTE3 Wave height from TE3 (Band energy from Czz10(f) where f =[30-100] mHz) cm
Fp Frequency f where Czz10(f) has its maximum in the range f =[30-500] mHz mHz
Fp_M Frequency f where Czz10(f) has its maximum in the range f =[30-1000] mHz mHz
AV10_H Number of degrees of freedom in the energy density spectrum (4 * Ndlr_H) −
HS7 Wave height from band energy from Czz5(f) in the range f =[30-142.5] mHz cm
Tm0_1 Minus first moment period from M-1 and M0 in the range f =[30-500] mHz s
Tm0_1_M Minus first moment p eriod from M-1 and M0 in the range f =[30-1000] mHz s
Table 3: Parameters of spectral processing (over a 20 [min] data block)
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