Space-time distribution of ionosphere ionization rate during GLE and SEP events by Solar Cosmic Rays (SCR): Their changing from 1950 up to expected at 2050 due to variations of CR penumbra functions and cutoff rigidities with taking into account time variations of SCR spectrum during GLE and SEP events.
Abstract
The effective cutoff rigidity is determined not only by the penumbra function (equal to 1 for allowed CR trajectories and 0 for forbidden trajectories), but also by rigidity/energy spectrum of SCR, which changed with time during GLE and SEP events (caused by dependence of propagation parameters from rigidity/energy of SCR). We use results on the trajectory calculations of planetary distribution CR penumbra functions for each 5 years during 1950 - 2050 (1950, 1955, and so on, up to 2050). Based on these results we determine how changed the flux of SCR and corresponding ionization rate in low ionosphere (where SCR and GCR are main sources of ionization) due to time variations of Rc for the same each 5 years during 1950 - 2050 in dependence of latitude and longitude. For solar GLE and SEP events (with different primary rigidity/energy spectrums) obtained results give possibility to calculate and forecast more exactly their influence on ionosphere and radio-wave propagation finally caused by processes on the Sun (generation SCR and ejection from solar corona into solar wind), by Space Weather effects during SCR propagation from the Sun to the Earth), and by processes deep inside the Earth (changing the main magnetic field).
- Publication:
-
42nd COSPAR Scientific Assembly
- Pub Date:
- July 2018
- Bibcode:
- 2018cosp...42E.880D