@Article{MendesdaCostaRizz:1995:NiDrEl,
               author = "Mendes da Costa, Aracy and Rizzo Piazza, Liliana",
          affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and Centro de 
                         R{\'a}dio Astronomia e Aplica{\c{c}}{\~o}es Espaciais, CRAAE, 
                         Escola Polit{\'e}cnica da Universidade de S{\~a}o Paulo",
                title = "Night-time D-region electron density variations observed in the 
                         South Atlantic Geomagnetic Anomaly in association with 
                         solar-proton events",
              journal = "Journal of Atmospheric and Solar-Terrestrial Physics",
                 year = "1995",
               volume = "57",
               number = "8",
                pages = "899--904",
                month = "July",
             keywords = "very low frequency signals (VLF), D-region, electron density, 
                         South Atlantic Geomagnetic Anomaly (SAGA).",
             abstract = "Very low frequency signals (VLF) received in Atibaia (Brazil) 
                         during the occurrence of the two major solar-proton events of 
                         August 1972 and July 1974 were analysed. Phase and amplitude 
                         changes observed at night were introduced in the model given by 
                         Wait and Spies (1964) properly adapted to the ionospheric 
                         conditions of the South Atlantic Geomagnetic Anomaly (SAGA) 
                         region. Electron density disturbed profiles for {"}L{"} shell 
                         intervals 1. 15 < L < 2.0 and 1.08 < L < 1. 15 were deduced. The 
                         results highlight the great amount of ionization produced at low 
                         {"}L{"} values due to the precipitation of energetic particles in 
                         the SAGA, mainly at night. Some discrepancies among the electron 
                         density profiles proposed by different authors are discussed.",
                 issn = "1364-6826",
                label = "7280",
             language = "en",
           targetfile = "1-s2.0-002191699400068Y-main.pdf",
        urlaccessdate = "02 maio 2024"
}