F(T) = 



1 

 ] + (DW + D) 



(3) 



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 re- 

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

 coefficients), the following should be used: 



F(T) 



1 



1 + (DW + D) 



(4) 



34. The following example demonstrates use of the calibration results. 

 The nearshore Waverider buoy on 25 October recorded the annual extreme signif- 

 icant wave height of 3.80 m with an associated peak spectral period of 



10.9 seconds. From Table 2, the Datawell-predicted sensitivity error DW is 

 -0.0071, with a corresponding uncorrected difference error d of -0.0718. 



35. To determine the correction for the difference error, the water 

 temperature is also required; the ocean water temperature at that time was 

 approximately 16° C (see Part V). The correction (see tabulation) is 0.015, 

 thus: 



D = d + 0.015 = -0.0718 + 0.015 or D = -0.0568 

 F(T) can be determined from Equation 3 as 



^^'^^ 1 + (DW + D) 



1 + (-0.0071 - 0.0568) 



1 



0.9361 



F(T) = 1.0683 



Finally, the corrected significant height is 3.80 m x F(T) = 3.80 m x 1.0683 

 = 4.06 m , which is a 7 percent increase. 



36. In general, the wave statistics errors are near 5 percent for wave 



20 



