Table AlO 

 Increase in Waverider Sensitivity from Water Temperature 







Lower 



than Calibration 



Temperature" 













Water Temperature, 



°C 







Difference 



22.4 

 0.000 



20 

 0.001 



18 



16 

 0.001 



14 

 0.001 



12 

 0.000 



10 



8 



0.00 



0.001 



-0.000 



-0.002 



-0.01 



0.000 



0.007 



0.008 



0.009 



0.010 



0.011 



0.011 



0.011 



-0.02 



0.000 



0.009 



0.012 



0.014 



0.016 



0.018 



0.019 



0.020 



-0.03 



0.000 



0.009 



0.013 



0.016 



0.019 



0.021 



0.024 



0.026 



-0.04 



0.000 



0.008 



0.012 



0.016 



0.020 



0.023 



0.027 



0.029 



-0.05 



0.000 



0.006 



0.011 



0.016 



0.020 



0.024 



0.028 



0.032 



-0.06 



0.000 



0.004 



0.010 



0.015 



0.020 



0.025 



0.030 



0.034 



-0.07 



0.000 



0.003 



0.009 



0.015 



0.021 



0.026 



0.031 



0.036 



-0.08 



0.000 



0.003 



0.010 



0.017 



0.023 



0.029 



0.034 



0.039 



-0.09 



0.000 



0.006 



0.013 



0.019 



0.026 



0.032 



0.038 



0.043 



-0.10 



0.000 



0.010 



0.017 



0.024 



0.031 



0.037 



0.043 



0.049 



* Based on a figure provided by Datawell. 



which can be applied by multiplying the uncorrected amplitude by F(T) for T 

 equal to the peak spectral wave period. For correction of parameters related 

 to the square of the amplitude — i.e., total energy or variance spectrum 

 coefficients — the following should be used: 



J ! ^1 



[l + (DW + D)J 



[F(T)]2 =iT-^-77^i7^r-F^I (3) 



10. To apply the correction, first the difference error between the 

 Datawell predicted error and the error measured during calibration are deter- 

 mined. This difference error is then adjusted for the temperature-dependent 

 increase in electrical conductivity before the Datawell predicted difference 

 error and the corrected difference error are summed. Finally, the decrease in 

 sensitivity (based on the wave period) is computed by adding 1 to the sum. 



11. To demonstrate the use of the calibration results, the Waverider 



located 3 km from shore recorded a wave height H of 4.1 m and wave period 



m 

 o 



A25 



