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17 Research products, page 1 of 2

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  • Annales Geophysicae (ANGEO)

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  • Open Access English
    Authors: 
    Grandin, Maxime; Battarbee, Markus; Osmane, Adnane; Ganse, Urs; Pfau-Kempf, Yann; Turc, Lucile; Brito, Thiago; Koskela, Tuomas; Dubart, Maxime; Palmroth, Minna;
    Project: EC | QUESPACE (200141), EC | FRoST (704681), EC | PRESTISSIMO (682068)

    Particle precipitation plays a key role in the coupling of the terrestrial magnetosphere and ionosphere by modifying the upper atmospheric conductivity and chemistry, driving field-aligned currents, and producing aurora. Yet quantitative observations of precipitating fl...

  • Open Access English
    Authors: 
    Sicard-Piet, A.; Boscher, D.; Horne, R. B.; Meredith, N. P.; Maget, V.;
    Project: EC | SPACECAST (262468)

    Wave particle interactions play an important role in controlling the dynamics of the radiation belts. The purpose of this study is to estimate how variations in the plasma density can affect diffusion rates resulting from interactions between chorus waves and plasmasphe...

  • Open Access English
    Authors: 
    Forte, B.; Smith, N. D.; Mitchell, C. N.; Dalt, F.; Panicciari, T.; Chartier, A. T.; Stevanovic, D.; Vuckovic, M.; Kinrade, J.; Tong, J. R.; +2 more
    Project: EC | EISCAT_3D_2 (261967), EC | TRANSMIT (264476)

    The impact of space weather events on satellite-based technologies (e.g. satellite navigation and precise positioning) is typically quantified on the basis of the total electron content (TEC) and temporal fluctuations associated with it. GNSS (global navigation satellit...

  • Open Access English
    Authors: 
    Heilig, B.; Lühr, H.;
    Project: EC | PLASMON (263218)

    We introduce a new model for the plasmapause location in the equatorial plane. The determination of the L-shell bounding the plasmasphere is based on magnetic field observations made by the CHAMP satellite in the topside ionosphere. Related signals are medium-scale fiel...

  • Open Access English
    Authors: 
    Palmroth, M.; Laitinen, T. V.; Anekallu, C. R.; Pulkkinen, T. I.; Dunlop, M.; Lucek, E. A.; Dandouras, I.;
    Project: EC | QUESPACE (200141)

    We investigate the spatial variation of magnetopause energy conversion and transfer using Cluster spacecraft observations of two magnetopause crossing events as well as using a global magnetohydrodynamic (MHD) simulation GUMICS-4. These two events, (16 January 2001, and...

  • Open Access English
    Authors: 
    Artemyev, A. V.; Hoshino, M.; Lutsenko, V. N.; Petrukovich, A. A.; Imada, S.; Zelenyi, L. M.;
    Project: EC | GEOPLASMAS (269198)

    In this paper, we consider electron acceleration in the vicinity of X-line and corresponding formation of energy spectra. We develop an analytical model including the effect of the electron trapping by electrostatic fields and surfing acceleration. Speiser, Fermi and be...

  • Open Access English
    Authors: 
    Walker, S. N.; Kadirkamanathan, V.; Pokhotelov, O. A.;
    Project: EC | SEMEP (262005)

    Electromagnetic phenomena observed in association with increases in seismic activity have been studied for several decades. These phenomena are generated during the precursory phases of an earthquake as well as during the main event. Their occurrence during the precurso...

  • Open Access English
    Authors: 
    Simon Wedlund, C.; Gronoff, G.; Lilensten, J.; Ménager, H.; Barthélemy, M.;
    Project: EC | SOTERIA (218816), EC | EUROPLANET RI (228319)

    The mean energy W expended in a collision of electrons with atmospheric gases is a useful parameter for fast aeronomy computations. Computing this parameter in transport kinetic models with experimental values can tell us more about the number of processes that have to ...

  • Open Access English
    Authors: 
    Amiridis, V.; Kafatos, M.; Perez, C.; Kazadzis, S.; Gerasopoulos, E.; Mamouri, R. E.; Papayannis, A.; Kokkalis, P.; Giannakaki, E.; Basart, S.; +2 more
    Project: EC | VAP-OMI (219908)

    A long-lasting Saharan dust event affected Europe on 18–23 May 2008. Dust was present in the free troposphere over Greece, in height ranges between the surface and approximately 4–5 km above sea level. The event was monitored by ground-based CIMEL sunphotometric and mul...

  • Open Access English
    Authors: 
    Amariutei, O. A.; Ganushkina, N. Yu.;
    Project: EC | SPACECAST (262468)

    An ARMAX based model, to forecast the evolution of the of AL index, is developed. The model has been trained and validated using neural networks with the half wave rectifier (VBs) as input. It is shown that the model posses a good, reliable forecasting ability, includin...