ANALYSIS OF THE DIRECTIONAL WAVE SPECTRUM FROM FIELD DATA

The inherent drawbacks of several conventional methods for estimating the directional wave spectrum are discussed, after which three of the most practical methods are described: the maximum entropy principle method (MEP), Bayesian directional spectrum estimation method (BDM), and extended maximum entropy principle method (EMEP). Numerical computation procedures for these methods are described in some details. These methods are examined using numerical simulation and field data of waves, with their validity being subsequently discussed. In addition, a newly developed submerged Doppler-type directional wave meter is introduced with an example of directional spectra obtained.