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Annales Geophysicae An interactive open-access journal of the European Geosciences Union
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Volume 26, issue 4
Ann. Geophys., 26, 759-783, 2008
https://doi.org/10.5194/angeo-26-759-2008
© Author(s) 2008. This work is distributed under
the Creative Commons Attribution 3.0 License.
Ann. Geophys., 26, 759-783, 2008
https://doi.org/10.5194/angeo-26-759-2008
© Author(s) 2008. This work is distributed under
the Creative Commons Attribution 3.0 License.

  13 May 2008

13 May 2008

Advanced intermittent clutter filtering for radar wind profiler: signal separation through a Gabor frame expansion and its statistics

V. Lehmann1 and G. Teschke2 V. Lehmann and G. Teschke
  • 1Deutscher Wetterdienst, Meteorologisches Observatorium Lindenberg, 15848 Lindenberg, Germany
  • 2Zuse-Institut Berlin, Takustr. 7, 14195 Berlin, Germany

Abstract. A new signal processing method is presented for the suppression of intermittent clutter echoes in radar wind profilers. This clutter type is a significant problem during the seasonal bird migration and often results in large discrepancies between profiler wind measurements and independent reference data. The technique presented makes use of a discrete Gabor frame expansion of the coherently averaged time series data in combination with a statistical filtering approach to exploit the different signal characteristics between signal and clutter. The rationale of this algorithm is outlined and the mathematical methods used are presented in due detail. A first test using data obtained with an operational 482 MHz wind profiler indicates that the method outperforms the previously used clutter suppression algorithm.

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