author = "Batista, Inez Staciarini and Souza, Jonas Rodrigues de and Abdu, 
                         Mangalathayil Ali and Reinisch, B. W. and Bullett, T. W. and Rios, 
                         V. H.",
          affiliation = "Instituto Nacional de Pesquisas Especiais, Divis{\~a}o de 
                         Aeronomia (INPE.DAE) and Instituto Nacional de Pesquisas 
                         Especiais, Divis{\~a}o de Aeronomia (INPE.DAE) and Instituto 
                         Nacional de Pesquisas Especiais, Divis{\~a}o de Aeronomia 
                         (INPE.DAE) and {University of Massachusetts} and {Air Force 
                         Research Laboratory} and {Universidad de Tucuman}",
                title = "Ionospheric response to the October 2003 geomagnetic superstorm in 
                         the South American-Atlantic sector",
            booktitle = "Proceedings...",
                 year = "2006",
         organization = "Committe on Space Research, 36. (COSPAR).",
             abstract = "The major geomagnetic storm that started at 0611GMT on 29th 
                         October, 2003, in response to the solar event that occurred on the 
                         day before, has affected the earth ionosphere at a broad range of 
                         latitudes and longitudes. Drastic and peculiar effects were 
                         observed at the equatorial and low latitude ionospheric F region a 
                         few hours following the storm onset and also in the following 
                         days. In this work we analyze ionograms from a chain of Digisonde 
                         stations in the South American-Atlantic (280o - 345oE) longitude 
                         sector in order to study the ionospheric response to the intense 
                         solar event. Less that two hours after the storm onset, an unusual 
                         early morning enhancement of the equatorial ionization anomaly was 
                         observed at the three ionospheric stations located at or close to 
                         the equatorial anomaly crest Tucuman (TU, 26.9o S, 294.6o E, dip: 
                         -26.24o), Cachoeira Paulista (CP, 22.5o S, 315o E, dip: -32.9o) 
                         and Ascension Island (AI, 7.95o S, 345.6o E, dip: -37.8o). The 
                         anomaly intensification was more pronounced at TU and CP, where 
                         the F layer peak electron density increased from 1.1x105 
                         el.cm\−3to 2.8x106 el.cm\−3, than at AI. The most 
                         striking fact about this intensification is that it occurred just 
                         before sunrise at TU and around sunrise at CP, when the conditions 
                         for the fountain effect are not set yet. Another striking effect 
                         of the magnetic storm was the spectacular uplift of the F layer 
                         around sunset on 30th October, at the equatorial station S{\~a}o 
                         Lu{\'{\i}}s (SL, 2.6o S, 315.8o E, dip: -2.6o), where the F 
                         layer trace disappeared from the ionogram by 45 min. because it 
                         was above the 1200 km Digisonde upper sounding limit. This effect 
                         was more pronounced at SL and CP than at Jicamarca, TU and AI. The 
                         observed results will be discussed in terms of disturbance 
                         electric fields and winds, and their local time, latitude and 
                         longitude dependence.",
  conference-location = "Beijing, China",
      conference-year = "2006-07-16",
             language = "en",
        urlaccessdate = "24 jan. 2021"