A Comparison of algorithms for extracting significant wave height from HF radar ocean backscatter spectra

Heron, S.F., and Heron, M.L. (1998) A Comparison of algorithms for extracting significant wave height from HF radar ocean backscatter spectra. Journal of Atmospheric and Oceanic Technology, 15 (5). pp. 1157-1163.

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Abstract

A comparison is made between three different but related algorithms for the extraction of rms wave heights from high frequency ocean backscatter radar spectra. All three methods are based on the ratio of second- to first-order energies as developed by Barrick, and each was scaled so that the mean values of the radar analysis results and the corresponding wave buoy data were zero. The rms difference between the radar wave heights and those from the buoy was taken as a measure of fit, and the recommended algorithm had an rms difference value of 7 cm. Barrick's algorithm (after scaling), which uses a weighted second-order energy integral, performed marginally better than the others. The condition requiring wind directions other than close to orthogonal to the radar beam is retained in the recommended algorithm but is not evaluated because of sparsity of data. The algorithm for extraction of rms wave heights is validated against the buoy data over rms wave height ranges from about 0.2 to 0.7 m.

Item ID: 21494
Item Type: Article (Refereed Research - C1)
ISSN: 1520-0426
Date Deposited: 27 Jun 2012 05:57
FoR Codes: 04 EARTH SCIENCES > 0405 Oceanography > 040503 Physical Oceanography @ 100%
SEO Codes: 96 ENVIRONMENT > 9611 Physical and Chemical Conditions of Water > 961104 Physical and Chemical Conditions of Water in Marine Environments @ 100%
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