IONIZATION OF SOLAR COSMIC RAYS IN IONOSPHERE AND MIDDLE ATMOSPHERE SIMULATED BY CORIMIA PROGRAMME

In this work we investigate the effects of solar cosmic ray (SCR) from the GLE (Ground Level Enhancement) 69 on 20 January 2005 and GLE 05 on 23 February 1956. For this purpose we apply our operational programme CORIMIA (COsmic Ray Ionization Model for Ionosphere and Atmosphere). In the final version of the applied model an approximation in 5 characteristic energy intervals of the Bohr Bethe Bethe function including charge decrease interval is used. For the first time we present these quantitative and qualitative appreciations of the SCR fluxes impact from these Solar Particle Events (SPE) on the ionosphere and middle atmosphere (30-120 km). Unlike the cases of galactic cosmic rays (GCR), SCR differential spectra vary essentially in time during the course of the investigated event. Also SCR fluxes differ from one another for different events. The profiles behaviour is explained taking into account the structure of the CORIMIA programme. The computational results are in accordance with the experimental data. They show characteristic features of the ionization rate process for different geomagnetic latitudes and altitudes. The calculations are performed over geomagnetic latitudes 65 degrees-90 degrees as the profiles values grow strongly at high latitudes.