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    <title>Modelling of mid-latitude ionospheric trough location and dynamics using multi-frequency radio sounding and in-situ observations</title>
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  <abstract type="Summary">The mid-latitude ionospheric trough (MIT) is a nighttime electron density depletion at subauroral latitudes that can affect trans-ionospheric radio systems, including GNSS. Using long-term electron density data from GRACE and Swarm and TEC data from IGS Global Ionosphere Maps, this study analyzes MIT position, width, depth, and occurrence in both hemispheres under varying solar and geomagnetic conditions. A statistical MIT model was developed and evaluated during the May 2024 Mother’s Day storm, demonstrating its ability to reproduce smoothed trough behavior.&lt;eng&gt;</abstract>
  <abstract type="Summary">Der ionosphärische Trog in den mittleren Breitengraden (MIT) ist eine nächtliche Elektronendichteverringerung in subauroralen Breiten, die transionosphärische Funksysteme einschließlich GNSS beeinträchtigen kann. Mit Langzeitdaten von GRACE und Swarm sowie TEC-Daten aus IGS Global Ionosphere Maps untersucht diese Arbeit Position, Breite, Tiefe und Auftretenswahrscheinlichkeit des MIT in beiden Hemisphären unter geomagnetischen Bedingungen. Ein statistisches MIT-Modell wurde entwickelt und im Muttertagssturm im Mai 2024 evaluiert, wobei geglättetes Trogverhalten reproduziert werden konnte.&lt;ger&gt;</abstract>
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  <note type="statement of responsibility">vorgelegt von Kateryna Lubyk</note>
  <note>GutachterInnen: Andreas Wehrenpfennig (Neubrandenburg University of Applied Sciences) ; Claudia Stolle (Leibniz Institute of Atmospheric Physics, University of Rostock) ; Elena Kronberg (Ludwig-Maximilians-Universität München)</note>
  <note type="thesis">Dissertation Universität Rostock 2025</note>
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      <title>Modelling of mid-latitude ionospheric trough location and dynamics using multi-frequency radio sounding and in-situ observations</title>
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      <publisher>Rostock : Universität Rostock, 2025</publisher>
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    <identifier type="local">(DE-627)1986882985</identifier>
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      <namePart>Lubyk, Kateryna, 1995 - </namePart>
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  <identifier type="urn">urn:nbn:de:gbv:28-rosdok_id00005886-4</identifier>
  <identifier type="doi">10.18453/rosdok_id00005886</identifier>
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