Study of the variation of lower ionosphere ionization through cosmic noise ionospheric absorption in the South America sector during solar maximum (1989-1991)
Abstract
The variation of ionospheric cosmic noise absorption and the variation of lower ionosphere ionization events during the solar maximum activity have been studied from 1989 to 1991 in two different stations in the South American sector: one station is situated at the region of South Atlantic Magnetic Anomaly (Cachoeira Paulista) and the other one located at the sub -auroral region (Brazilian Antarctic Station). For this study, riometer data collected from these two stations are used. The receiving antennas were pointed to zenital and west directions. The objective of this study is to identify the main non solar sources of ionization for the lower ionosphere (D and E Regions) during diurnal and nocturnal periods. The analyses will be based on the presently known ion chemistry for these region, and will consider variabilities in the ionization source rising from solar events and activity cycle and magnetic storms.
- Publication:
-
34th COSPAR Scientific Assembly
- Pub Date:
- 2002
- Bibcode:
- 2002cosp...34E.544B