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.
Maritime environment, and in particular the sea clutter, has a significant impact on the detection efficiency. Therefore the physical properties of the radar sea clutter must be well mastered. In this paper, we focus on sea clutter data acquired during an experiment called MARLENE, which was held in the Mediterranean Sea region of Toulon, France, in 2014. The aim of this experiment was to characterize...
In the maritime boundary layer, air-sea interaction processes have an important impact on radar propagation. The radar range performance near the sea surface depends on meteorological and sea surface conditions. Strong gradients of humidity and temperature close to the air-water interface are most often the reason for propagation effects such as ducting. For ship borne radars the evaporation duct...
This paper addresses an experiment that was carried out in the North Sea region in the area of the island of Sylt with the aim to study the influence of the maritime boundary layer (MBL) on the propagation of radar signals under low grazing angle geometry. The radar measurements were carried out with the highly versatile MEMPHIS radar operating in sea configuration at X, Ka and W band simultaneously...
In the framework of Germany and France cooperation, a specific experiment called MARLENE has been carried out in the Mediterranean sea region off Toulon, France, in spring 2014. It aims at characterizing sea environmental influence on electromagnetic wave propagation and sea backscattering for Refractivity From Clutter (RFC) and radar Doppler detection. Environment measurements and characterization...
This contribution reports about experimental activities during the 2011 Squirrel campaign in the Baltic Sea, where a number of in- and outbound runs of the Mittelgrund research vessel were measured by the Fraunhofer FHR MEMPHIS Radar in sea configuration at both Ka and W band. Aboard the employed vessel, four corner-reflectors (CR) at different heights in forward and backward direction where mounted...
The results of a propagation experiment with measurements above the sea surface during September 2011 in the frame of the Squirrel campaign are shown. For the experiment, MEMPHIS, a highly versatile radar developed at Fraunhofer FHR (former FGAN) was applied to perform a number of measurements towards a point target (corner reflector) located at the Bookniseck site over a pathlenghts of nearly 8 km...
Helicopter collision avoidance sensors require all weather and day and night performance. Radar fulfills these conditions. To be able to see also cables and other small scale structures, millimeter wave radar is a favourite candidate for this task. To be able to develop adequate collision avoidance algorithms, a data base of relevant background signatures has to be available. Measurements with a 94...
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.