The WERA system (WavE RAdar) is a shore based remote sensing system using radar technology to monitor ocean surface currents, waves and wind direction. High resolution monitoring system operates with radio frequencies between 5 and 50 MHz. A vertical polarised electromagnetic wave is coupled to the conductive ocean surface and will follow the curvature of the earth. The rough ocean surface interacts with the radio wave and due to the Bragg Effect back-scattered signals can be detected from ranges of more than 200 km.
The robust shore based system delivers reliable data even under extreme weather and very dynamic ocean current conditions. This surface current image was taken during the passage of Tropical Storm Henri on the 5th of September 2003. Numerous live comparisons of the WERA data with other measurement techniques prove the high quality of the near real-time measurments of the system.