منابع مشابه
Dynamical partitioning of directional ocean wave spectra
Directional wave spectra generally exhibit several peaks due to the coexistence of wind sea generated by local wind conditions and swells originating from distant weather systems. This paper proposes a new algorithm for partitioning such spectra and retrieving the various systems which compose a complex sea-state. It is based on a sequential Monte-Carlo algorithm which allows to follow the time...
متن کاملEvolution of Directional Wave Spectra Through Finite Regular and Randomly Perturbed Arrays of Scatterers
A method is proposed to solve the full linear problem of wave scattering by a large finite array of circular inclusions in two spatial dimensions and compute the concomitant evolution of directional wave properties through the array. The method decomposes the array into slabs. Interactions between adjacent slabs are calculated using a representation of the wave fields scattered by each slab as ...
متن کاملMaximum entropy estimation of directional wave spectra from an array of wave probes
A procedure for estimating directional wave spectra from an array of wave probes based on the Maximum Entropy Method (MEM) is developed in the present paper. The MEM approach yields an angular spreading function at each frequency band consistent with the input crossspectral density matrix. The method is evaluated using numerical simulations of directional sea states. The MEM is also used to ana...
متن کاملThe Microwave Measurement of Ocean-wave Directional Spectra
When we attempt to gain knowledge about the temporal and spatial variations of sea-surface displacements caused by waves, various levels of information may be specified. The most complete knowledge of sea-surface displacements would be obtained from two-dimensional images taken successively in time. Resolutions and sampling intervals in both space and time could be adjusted to control the amoun...
متن کاملWave Directional Spectrum From SAR Imagery
Gaussian smoothed SAR image spectra have been evaluated from 512 x 512 pixel subscenes of image mode ERS-1 SAR scenes off Goa, Visakhapatnam, Paradeep and Portugal. The two recently acquired scenes off Portugal showed the signature of swell of wavelength 200m and internal waves of wavelength > 400m. Only internal waves of wavelength > 400m were seen in the scene off Goa observed on 11 March 199...
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ژورنال
عنوان ژورنال: Coastal Engineering Proceedings
سال: 1970
ISSN: 2156-1028,0589-087X
DOI: 10.9753/icce.v12.8