Impact of cosmic rays and solar energetic particles on the Earth’s ionosphere and atmosphere von Velinov, Peter I.Y., Asenovski, Simeon, Kudela, Karel, Lastovicka, Jan, Mateev, Lachezar, Mishev, Alexander, Tonev, Peter

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Global planetary ionization maps in Regener-Pfotzer cosmic ray maximum for GLE 66 during magnetic superstorm of 29–31 October 2003 von Dorman, Lev I., Velinov, Peter I.Y., Mishev, Alexander

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Influence of solar activity on red sprites and on vertical coupling in the system stratosphere–mesosphere von Tonev, Peter T., Velinov, Peter I.Y.

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Numerical calculation of cosmic ray ionization rate profiles in the middle atmosphere and lower ionosphere with relation to characteristic energy intervals von Velinov, Peter I. Y., Asenovski, Simeon N., Mateev, Lachezar N.

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A comparison between effects of solar proton events and of geomagnetic storms on the ozone profiles von Tassev, Yordan, Velinov, Peter I.Y., Mateev, Lachezar, Tomova, Dimitrinka

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