Remote Sensing of Surface Currents and Waves by the HF Radar WERA
K.-W. GURGEL, G. ANTONISCHKI
Seventh IEE Conference on Electronic Engineering in Oceanography,
Proceedings, ISBN 0 85296 689 X, pp. 211...217, 1997.
Abstract - -
HF radar is based on the process of backscattering of
electromagnetic waves of 10 m to
50 m wavelength from the rough sea surface and can be used to measure surface
currents and ocean wave parameters. In contrast to microwave radars, the
transmitted electromangetic wave is guided by the sea surface
following the curvature of the earth beyond the horizon.
Depending on the selected working
frequency, high ranges up to 200 km can be achieved. The technique
has been rapidly developed during the past 25 years.
In Germany, the HF radar work started in 1980 by adopting NOAA's CODAR
system, introduced in 1977 by D. E. Barrick. Recent developments lead to
an improved design called WERA (WEllen RAdar).
This paper describes the different techniques used by CODAR and WERA,
their advantages for different applications, the design of WERA and
an application at the Dutch coast.
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