Abstract
Ionospheric data over two stations in Brazil, one at the magnetic equator and the other close to the southern crest of the equatorial ionization anomaly, during high and low solar activity periods were analyzed. The monthly mean of the parameters ƒ oF 2 and h mF 2 are calculated and compared with the IRI model. The highest discrepancies are observed on post-sunset and nighttime values of ƒ oF 2 and h mF 2 parameters over the equatorial station São Luís (2.6°S, 44.2°W, dip angle: −0.5°). In general IRI underestimates h mF 2 and overestimates h mF 2 at the magnetic equatorial station. The effects of post-sunset enhancement of the F-region vertical drift and the resulting intensification of the equatorial ionization anomaly are much stronger in the observation than IRI. The bottomside thickness parameter Bo is also calculated and compared with those used in IRI model.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
