Accession Number : ADA207628

Title :   Algorithms for Computation of Water Level Elevation at a Fixed Location from the Water Level Elevations at a Moving Platform.

Descriptive Note : Final rept. Nov 87-Jun 88,

Corporate Author : BORGMAN (LEON E) INC LARAMIE WY

Personal Author(s) : Borgman, Leon E

PDF Url : ADA207628

Report Date : Mar 1989

Pagination or Media Count : 31

Abstract : This document provides analytical algorithms for computation of water level elevation time series at a fixed location from water level measurements made on a moving a ocean platform. The algorithms are based on geostatistical techniques, including kriging methods and conditional simulation. Wave or water elevation time histories are usually measured from a fixed reference location. Wave elevation measurements made using a wave measurement attached to a floating ocean platform need to be corrected for the motions of the platform. Most computer simulation programs, including the conditional wave model require wave input for a fixed reference location. The report presents the two basic methods (kriging and conditional simulation), develops a rapid procedure for computing the wave elevation covariance matrix for both methods, and concludes that the kriging method is the better choice. Keywords: Ocean wave kinematics; Statistical analysis estimates; Bessel functions; Fast fourier transforms; Kriging procedures; Directional wave spectra. (edc)

Descriptors :   *OCEAN WAVES, *SEA LEVEL, ALGORITHMS, BESSEL FUNCTIONS, COMPUTER PROGRAMS, COMPUTERIZED SIMULATION, COVARIANCE, DIRECTIONAL, ELEVATION, ESTIMATES, FAST FOURIER TRANSFORMS, FLOATING PLATFORMS, HISTORY, INPUT, KINEMATICS, MATRICES(MATHEMATICS), MEASUREMENT, MATHEMATICAL MODELS, MOTION, OCEANS, PLATFORMS, SHIP MOTION, SIMULATION, SPECTRA, STATISTICAL ANALYSIS, TIME, WATER

Subject Categories : Statistics and Probability
      Physical and Dynamic Oceanography

Distribution Statement : APPROVED FOR PUBLIC RELEASE