Accession Number : AD0752135

Title :   Confidence Intervals for Ocean Wave Spectra.

Descriptive Note : Research rept.,

Corporate Author : WYOMING UNIV LARAMIE DEPT OF GEOLOGY

Personal Author(s) : Borgman,Leon E.

Report Date : SEP 1972

Pagination or Media Count : 17

Abstract : The random nature of ocean wave records introduces statistical variability into the wave spectrum estimates based on these records. This may cause inaccuracy in subsequent calculations such as the prediction of the primary wave direction or the estimation of structural response. Confidence intervals on such estimates are needed to evaluate whether adequate estimate accuracy has been obtained. The chi-squared confidence interval commonly used for wave spectra is based on the assumption of a Gaussian sea surface. Its applicability for hurricane size waves has been open for question. Therefore, after a brief outline of the relevant statistical relations basic to the chi-squared procedure, wave data from Hurricane Carla is empirically analyzed and compared with the theoretical conclusions. A simulation procedure is used to proceed from the data to probability interval statements. (Author)

Descriptors :   (*OCEAN WAVES, SPECTRUM ANALYZERS), CONFIDENCE LIMITS, TROPICAL CYCLONES, INTEGRAL TRANSFORMS, FOURIER ANALYSIS, STOCHASTIC PROCESSES, STATISTICAL TESTS

Subject Categories : Physical and Dynamic Oceanography

Distribution Statement : APPROVED FOR PUBLIC RELEASE