Athanasios Papaioannou received his B.Sc. in Physics with an orientation in Astrophysics from the Department of Physics of the National and Kapodistrian University of Athens (NKUA) in 2005. In 2007 he received his M.Sc. degree in Elementary Particles and Nuclear Physics and in 2012 he earned his Ph.D from the same Department.
Since 2011 he joined the Institute for Astronomy, Astrophysics, Space Applications and Remote Sensing (IAASARS) of the National Observatory of Athens (NOA) to work as a Research Associate and further on as a Post-doc Researcher. He has been a Visiting Researcher at the Christian-Albrechts-Universitat zu Kiel (Germany), the University of Turku (Finland), the Institute of Terrestrial Magnetism, Ionosphere and Radiowave Propagation by N.V. Pushkov RAS (IZMIRAN) (Russia) and the Universitat de Barcelona (Spain). In 2018 he was elected as an Associate Researcher and in 2021 he was promoted to a Senior Researcher at IAASARS/NOA.
Space Physics, Heliophysics and Cosmic rays (CRs) of both galactic (GCRs) and solar (SCRs) origin. Convection, Diffusion and Acceleration of Particles in the Heliosphere; Sun-Earth connection processes; Solar Flares and Coronal Mass Ejections; Space Weather; Cosmic radiation; Systems (neutron monitors); Exoplanetary Radiation Environment; Study of the characteristics of large-scale magnetic structures as they propagate from the Sun in the heliosphere and the resulting Forbush decreases; Study and modeling of the electrical properties of the atmosphere. Development of forecasting systems focused at Space Storms and Space Weather with emphasis on data driven models.