Blar i forfatter "Sergienko, T"

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    • Enhanced EISCAT UHF backscatter during high-energy auroral electron precipitation 

      Schlatter, Nicola M.; Ivchenko, Nickolay; Sergienko, T; Gustavsson, Björn Johan; Brändström, B. U. E. (Journal article; Tidsskriftartikkel; Peer reviewed, 2013)
      Natural enhancements in the backscattered power of incoherent scatter radars up to 5 orders of magnitudes above the thermal backscatter are sometimes observed at high latitudes. Recently observations of enhancements in the backscattered power including a feature at zero Doppler shift have been reported. These enhancements are limited in altitude to tens of kilometers. The zero Doppler shift ...

    • A study of fine structure of diffuse aurora with ALIS-FAST measurements 

      Gustavsson, Björn Johan; Sergienko, T; Sandahl, Ingrid; Andersson, Laila; Brändström, B. U. E.; Steen, Å (Journal article; Tidsskriftartikkel; Peer reviewed, 2008)
      We present results of an investigation of the fine structure of the night sector diffuse auroral zone, observed simultaneously with optical instruments (ALIS) from the ground and the FAST electron spectrometer from space 16 February 1997. Both the optical and particle data show that the diffuse auroral zone consisted of two regions. The equatorward part of the diffuse aurora was occupied by a pattern ...