@InProceedings{PaulaMCNBMCAM:2018:IoAmSc,
               author = "Paula, Eurico Rodrigues de and Moraes, Alison de Oliveira and 
                         Caton, Ron and Negreti, Patr{\'{\i}}cia Mara de Siqueira and 
                         Batista, Inez Staciarini and Martinon, Andr{\'e} Ricardo Fazanaro 
                         and Cunha Neto, Ac{\'a}cio and Abdu, Mangalathayil Ali and 
                         Monico, Jo{\~a}o Francisco Galera",
          affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and {Instituto 
                         de Aeron{\'a}utica e Espa{\c{c}}o (IAE)} and {Air Force Research 
                         Laboratory} and {Instituto Nacional de Pesquisas Espaciais (INPE)} 
                         and {Instituto Nacional de Pesquisas Espaciais (INPE)} and 
                         {Instituto Nacional de Pesquisas Espaciais (INPE)} and {Instituto 
                         Nacional de Pesquisas Espaciais (INPE)} and {Instituto Nacional de 
                         Pesquisas Espaciais (INPE)} and {Universidade Estadual Paulista 
                         (UNESP)}",
                title = "Ionospheric amplitude scintillation behavior over the low latitude 
                         station of S{\~a}o Lu{\'{\i}}s during the September 6 to 10, 
                         2017 magnetic storm",
                 year = "2018",
         organization = "AGU Fall Meeting",
             abstract = "The September 6 to 10, 2017 magnetic storm was caused by an X9 
                         solar flare followed by a CME and the maximum Sym H magnetic index 
                         reached a value of -146 nT at 01:08 UT on day 08, after a Bz 
                         southward incursion of -31.21nT at 23:31 UT on day 07 and the Kp 
                         magnetic index reached 8. The solar wind increased from 400 km/s 
                         to about 600 km/s around 24 UT of day 06 and to about 800 km/s in 
                         the following night of 07/08. During the recovery phase of this 
                         storm there was another Bz southward incursion of -17.46 nT at 
                         11:55 UT on day 08 when Sym H reached -115 nt at 13:56 UT and Kp 
                         reached the value of 8.33. In this work the ionospheric amplitude 
                         scintillation at S{\~a}o Lu{\'{\i}}s (02.5o S, 44.3 o W, dip 
                         lat -04.67 o) was studied using data from an AFRL/INPE VHF 
                         receiver and a CIGALA/CALIBRA Septentrio receiver, both installed 
                         at S{\~a}o Lu{\'{\i}}s. The vertical plasma drift during 
                         daytime hours was determined using the magnetometer data from 
                         Bel{\'e}m (1.5 o S, 48.5 o W, dip lat -1.12 o) and Petrolina 
                         (09.4 o S, 40.5 o W, dip lat -13.45 o) and that during the evening 
                         prereversal enhancement period was calculated using ionogram data 
                         from the S{\~a}o Lu{\'{\i}}s digisonde. Compared to the 
                         geomagnetically quiet days of September 2017, both VHF and GNSS S4 
                         scintillation indices presented an increase during the night of 
                         07/08 when there was a strong increase in the vertical plasma 
                         drift due to a prompt penetration under-shielding electric field 
                         of eastward polarity (Ey) of about 17 mV/m magnitude. In contrast 
                         to this, on the night of 08/09 the ionospheric scintillation was 
                         completely inhibited as is a typical response to a disturbance 
                         dynamo electric field of westward polarity. During the following 
                         nights scintillation events were again gradually observed. Another 
                         Ey increase was observed at about 12 UT (09 LT) on day 08 when no 
                         scintillation was normally observed since it was daytime. The 
                         zonal drift determined by the VHF receiver around 24 UT (21 LT) 
                         was about 100 m/s and 150 m/s eastward on the nights of 05/ 06 and 
                         06/07, respectively. However, during the night of 07/08 of the 
                         storm, the zonal drift reversed to westward with a velocity of 
                         about -80 m/s. After the storm period the zonal drifts became 
                         eastward.",
  conference-location = "Washington, D. C.",
      conference-year = "10-14 dec.",
             language = "en",
           targetfile = "paula_ionospheric.pdf",
        urlaccessdate = "02 maio 2024"
}