Marine radar ocean wave retrieval's dependency on range and azimuth

TitleMarine radar ocean wave retrieval's dependency on range and azimuth
Publication TypeJournal Article
Year of Publication2014
AuthorsLund B., Collins C.O, Graber H.C, Terrill E, Herbers T.HC
JournalOcean Dynamics
Date Published2014/07
Type of ArticleArticle
ISBN Number1616-7341
Accession NumberWOS:000338317800006
Keywordsbuoy; equilibrium; images; Marine X-band radar; microwave backscatter; nautical radar; ocean waves; Remote; sea; sensing; Shipboard wave measurements; spectrum; surface currents; swell; wind retrieval

The strength of the surface wave signal in marine X-band radar (MR) images strongly depends on range and azimuth (i.e., the angle between antenna look and peak wave direction). Traditionally, MR wave analysis is carried out in a set of rectangular windows covering the radar field of view (FOV). The FOV is typically partially obstructed, e.g., due to the coastline or ship superstructures. Especially for ships that are subject to regular course changes, this results in an increased variability or error associated with wave parameters. Using MR measurements from R/P FLIP, acquired off California during the 2010 US Office of Naval Research (ONR) high resolution air-sea interaction (Hi-Res) experiment, this study quantifies the dependency of the radar-based 2D wave spectrum and parameters on range and azimuth. With the help of reference data from a nearby Datawell Waverider buoy, we propose empirical methods to remove the dependency and we illustrate their efficacy.

Short TitleOcean Dyn.
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