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Apr 26, 2012
The Influence Evaluation of the Noise for the Directional Wave Spectrum Estimated from HF Radar Received Signal
Authors: Shoichiro Kojima [email protected], Noriaki Hashimoto [email protected], and Yuji Sato [email protected]Author Affiliations
Publication: Ocean Wave Measurement and Analysis (2001)
Abstract
Measuring the sea surface currents by HF radar has already reached the practical level. Many observations have been done in the costal zone, and it has gotten great results so far. On the other hand, measuring the ocean waves by HF radar is not in the practical level yet, is actually in the theoretical level. The directional wave spectrum can be recently estimated from Doppler spectrum by the method which Hashimoto and Tokuda proposed theoretically. The directional wave spectrum, however, cannot always be estimated from Doppler spectrum by this method because the noise is contained in the received signal and Doppler spectrum estimated from the received signal is different from it in the theory. This study numerically simulates the received signal containing the noise and makes it clear what kind of influence is in Doppler spectrum calculated from it. In addition, it is evaluated that the influence of the noise to the directional spectrum estimated from Doppler spectrum, too.
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© 2002 American Society of Civil Engineers.
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Published online: Apr 26, 2012
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Domestic Research Fellow, Hydraulics Laboratory, Marine Environment and Engineering Department, Port and Airport Research Institute, Independent Administrative Institution, 3-1-1, Nagase, Yokosuka, Kanagawa, 239-0826, JAPAN. E-mail: [email protected]
Head, Hydraulics Laboratory, Marine Environment and Engineering Department, Port and Airport Research Institute, Independent Administrative Institution, 3-1-1, Nagase, Yokosuka, Kanagawa, 239-0826, JAPAN. E-mail: [email protected]
Researcher, Coastal Zone Systems Division, Coastal and Marine Department, National Institute for Land and Infrastructure Management, Ministry of Land, Infrastructure and Transport, 3-1-1, Nagase, Yokosuka, Kanagawa, 239-0826, JAPAN, satoh. E-mail: [email protected]
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