The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
This paper introduces the over-the-horizon radar technique optimized for oceanographic applications. The relation between radar range and operating frequency will be explained as well as the radar resolution which depends on the radar bandwidth. The accuracy in azimuth strongly depends on the number of used receive antennae and samples demonstrate the high accuracy that can be achieved. The oceanographic...
The HF-Coastal Radar “WERA” is a shore based remote sensing system to monitor ocean surface currents, waves and wind direction. This very reliable long range and high resolution monitoring system based on short radio wave radar technology. Due to the outstanding accuracy WERA can provide very valuable data to be assimilated into hydrographic models. In case of accidents in a distance of up to 200...
The WERA system (WavE RAdar) is a shore based remote sensing system to monitor ocean surface currents, waves and wind direction. WERA is using the lowest noise FMcw technique to provide highest temporal and fine spatial resolution for time critical applications. The vertical polarised electromagnetic wave is coupled to the conductive ocean surface and will follow the curvature of the earth. This over...
The Iroise Sea is located at the western end of Brittany (France), along the route of low-pressure atmospheric systems. The area is shallow (mean depth 110 m) and exhibits strong tidal currents (up to 8 knots in springtime). In summer, tidal fronts are generated in transition zones between the coastal area, where strong tidal currents efficiently mix the whole water column, and the offshore ocean,...
The performance and operational feasibility of the high-frequency Wellen Radar Doppler radar have been demonstrated in a region dominated by strong tidal currents during the SURveillance LITtorale OPerationnelle experiment in Brittany (France). Local weather-oceanic phenomena (current-wave-wind interactions) were measured for the first time by temporal-spatial analyses of the sea surface current measurements,...
The present work develops a new aspect in the use of HF radar as a tool for real time operational oceanography. We propose to implement new algorithms for detecting anomalies (outliers) on VHF radar data. Perspectives of such work are to detect changes in sea surface, such as ship or oil pollution. In this preliminary work, no information are given about the anomalies. We propose to study new detection...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.