Higher Order Statistical Analysis of Ocean Noise Measurements for PerformancePrediction. First Analysis of SWellEX-3 Noise Characteristics

摘要

This report summarizes the first analysis of SWellEX-3 noise for nonstationarityand nonGaussianity. In addition to the basic issues of characterizing the nonstationarity and nonGaussianity of the noise, it is also important to relate the noise characteristics to the shipping 'fingerprint' in the area, to the extent possible. Radar shiptrack data are available for the latter purpose. Rather than simply applying standard tests initially, very intuitive and graphical tests were designed to inform our understanding of the nature of the nonstationarity and nonGaussianity of the noise and to make clear which tests would be most appropriate and what other analysis might be necessary to raise our understanding to new levels. Significant nonstationarity and possibly nonGaussianity have been found, and these results are given.