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Ann. Geophys., 26, 759-783, 2008
www.ann-geophys.net/26/759/2008/
© European Geosciences Union 2008
Advanced intermittent clutter filtering for radar wind profiler: signal separation through a Gabor frame expansion and its statistics
V. Lehmann1 and G. Teschke2
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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