H/Hrms 

 Figure 1. Examples of model curves 



22. Ideally, f^ = and £3 = « , but in practice, the two frequen- 

 cies are bound to less diverse values. Where purely synthetic time series are 

 used, a low frequency of f^ = is realizable, but it results only in a 

 constant offset of the signal that would normally be removed in subsequent 

 wave height analysis. For computer-generated discrete time series, the lowest 

 practical frequency f;^ is that which allows enough cycles that wave heights 

 extracted from the time series include the effects of these low- frequency 

 waves . 



12 



