http://ifmaxp1.ifm.uni-hamburg.de/WERA.shtml Last update: Monday, 11-Jun-2007 14:16:25 CEST
 
University of Hamburg HF-Radar Home Page
 
Information Projects Publications Experiments Links Tests Institute of Oceanography Address
 
   

 WERA logo

What is WERA ?

Until 1996 the University of Hamburg HF-Radar group has been using a modified CODAR , which e.g. did not allow access to the second-order sidebands in the Doppler spectrum. To overcome these limitations, a new HF-radar we named WERA (WEllen RAdar) has been designed to allow for a wide range of working frequencies, spatial resolution, and antenna configutarions. The main advantages of WERA include:
  • Simultanous measurement of current and wave maps.
  • Different receiving antenna designs (4 to 16 antennas) in combination with direction finding and beam forming techniques for azimuthal resolution. Here is a picture of the 16-element linear array, which is needed for ocean surface current and wave measurement and this picture shows the 4-element square array, which can be used for ocean surface current measurement only.
  • Frequency chirp continuous wave modulation (FMCW)
    • to avoid a blind range in front of the radar,
    • to simply modify the radar's range resolution down to 300 m,
    • to reduce the impact of radio interference.
  • The radar is linked to a Unix workstation for data management and processing.
  • 90% of the signal processing steps are implemented in software and thus can be modified or updated in a simple way.
  • WERA is a very modular design, which can be easily adopted to different applications.

Examples

  • This is an example showing a coastal jet in front of the Dutch coast at 1.2 km resolution mode. An area up to 50 km off the coast can be covered.
  • A similar situation measured at 300 m resolution mode can be seen in this example.

Related projects


WERA System Characteristics


 
 
 
Klaus-Werner Gurgel's Homepage
Comments to:
 
WASd webserver
 
OpenVMS Operating SYSTEM
  Valid HTML 4.0!