Würzburg 2018 – scientific programme

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EP: Fachverband Extraterrestrische Physik

EP 8: Poster Session

EP 8.3: Poster

Wednesday, March 21, 2018, 17:00–18:30, BSZ - Pabel HS

Abstract: Application of Adaptive Filtering Techniques to Measurements in the Upper Atmosphere — •Jerry Czarnecki, Dimitry Pokhotelov, Gunter Stober, and Jorge Chau — Leibniz Institut für Atmosphärenphysik, Schlossstraße 6, 18225 Kühlungsborn, Germany

Results of upper atmospheric investigations using radar wind measurements suggest the usefulness of using an adaptive filtering technique developed to separate the velocity contributions of gravity wave components from those of planetary waves and tide components. The use of traditional analyses based on Fourier or Wavelet decompositions requires the data to be continuous and evenly-spaced, presenting a challenge when relying on intermittent measurements. The adaptive technique overcomes these limitations by varying the period of the wave components to be extracted according to the oscillation period of the wave to be filtered, i.e. 24-hour or 12-hour tides, and employing a least squares technique within successive time windows to extract these wave components. This work is concerned with investigating whether such adaptive techniques can be used to separate tidal components of waves in the Mesosphere-Lower Thermosphere. A comparison of results using this method on radar data to those given by numerical models is made.