MEASURING OCEAN WAVE SPECTRA FROM MARINE RADAR SEA CLUTTER

Authors
  1. Nickerson, W.
  2. Clarke, C.A.
Corporate Authors
NORDCO Ltd, St John's NFLD (CAN);Defence Research Establishment Atlantic, Dartmouth NS (CAN)
Abstract
A method of extracting ocean wave directional spectra from marine radar images of sea clutter has been developed. A series of radar screen photographs is digitized and input, after preprocessing, to a three-dimensional Fourier analysis. Variance in the spectrum can be controlled by either windowing, spectrum averaging, or filtering based on the gravity wave dispersion relationship. A software package has been developed and documented and the method tested on two data sets for which independent wave observations are available. Comparisons with wave buoy spectra are favourable with the radar spectrum showing a distinct peak shape and a spectrum that measures relative, not absolute wave variance. Recommendations are made for future research and application ot a ship-board near real-time system.
Report Number
186-87G — Contractor Report
Date of publication
15 Jun 1988
Number of Pages
71
DSTKIM No
89-00483
CANDIS No
58423
Format(s):
Hardcopy;Originator's fiche received by DSIS

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