Synthetic ocean waveforms for testing sonobuoy suspensions / David M. F. Chapman ; approved by P. Bhartia.: D68-21/28-1990E-PDF

"Four synthetic ocean waveforms are proposed for the testing of sonobuoy suspensions. They are based on the Bretschneider ocean wave spectrum, with significant waveheights chosen from the sea state code of the World Meteorological Organization (WMO) and corresponding peak periods based on statistical data from the Canadian North Atlantic Ocean in winter conditions. The waveforms are presented as sums of 20 sine-wave components of specified frequency, amplitude, and phase. There is one waveform each for WMO sea states 3, 4, 5, and 6, corresponding to significant waveheights of 1.25 m, 2.5 m, 4 m, and 6 m, respectively; the associated peak periods are 9 s, 10 s, 12 s, and 14 s, respectively. The maximum and minimum frequencies for each waveform are chosen to bracket 98% of the wave energy. All the information required to generate the waveforms is provided; waveform plots and numerical values at 0.5 s intervals are included for checking purposes"--Abstract, page ii.

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