Blar i forfatter Fakultet for naturvitenskap og teknologi "Jacobi, Christoph"

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    • Frequency spectra of horizontal winds in the mesosphere and lower thermosphere region from multistatic specular meteor radar observations during the SIMONe 2018 campaign 

      Charuvil, Harikrishnan; Chau, Jorge L.; Marino, Raffaele; Vierinen, Juha; Vargas, Fabio; Urco, Juan M.; Clahsen, Matthias; Jacobi, Christoph (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-05-11)
      In recent years, multistatic specular meteor radars (SMRs) have been introduced to study the Mesosphere and Lower Thermosphere (MLT) dynamics with increasing spatial and temporal resolution. SMRs, compared to other groundbased observations, have the advantage of continuously measuring the region between 80 and 100 km independent of weather, season, or time of day. In this paper, frequency spectra ...

    • Horizontal Correlation Functions of Wind Fluctuations in the Mesosphere and Lower Thermosphere 

      Poblet, Facundo L.; Vierinen, Juha; Avsarkisov, Victor; Conte, J. Federico; Charuvil Asokan, Harikrishnan; Jacobi, Christoph; Chau, Jorge L. (Journal article; Tidsskriftartikkel; Peer reviewed, 2023-03-01)
      Measurements of kinetic energy in vortical and divergent fluctuations in the mesosphere and lower thermosphere can be used to study stratified turbulence (ST) and gravity waves. This can be done using horizontal correlation functions of the fluctuating component of velocity. This study introduces a novel method for estimating these correlation functions using radars that observe Doppler shifts ...

    • Retrieving horizontally resolved wind fields using multi-static meteor radar observations 

      Stober, Gunter; Chau, Jorge L.; Vierinen, Juha; Jacobi, Christoph; Wilhelm, Sven (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-08-27)
      Recently, the MMARIA (Multi-static, Multi-frequency Agile Radar for Investigations of the Atmosphere) concept of a multi-static VHF meteor radar network to derive horizontally resolved wind fields in the mesosphere–lower thermosphere was introduced. Here we present preliminary results of the MMARIA network above Eastern Germany using two transmitters located at Juliusruh and Collm, and five receiving ...