author = "Aveiro, Henrique Carlotto and Denardin, Clezio Marcos and Abdu, 
                         Mangalathayil Ali and Schuch, Nelson Jorge",
          affiliation = "Instituto Nacional de Pesquisas Espaciais, Rio Grande do Sul and 
                         Instituto Nacional de Pesquisas Espaciais, Divis{\~a}o de 
                         Aeronomia(INPE, DAE)",
                title = "Geomagnetic Storm Effects on The Signatures of Equatorial 
                         Electrojet Plasma Irregularities",
            booktitle = "Proceedings...",
                 year = "2005",
         organization = "El Leoncito School on Solar Physics, 3.",
             abstract = "A 50 MHz coherent back-scatter radar, also known by the 
                         anachronism RESCO, has been operated in Brazil since 1998 at 
                         S{\~a}o Lu{\'{\i}}s (2.33 S, 44.2 W, DIP: -0.5), on the dip 
                         equator to study the equatorial electrojet dynamics. Spectral 
                         analyses of the received echoes from equatorial electrojet (EEJ) 
                         irregularities allow us to identify the dominant type of plasma 
                         instabilities in the electrojet bulk. From the frequency 
                         distribution of the irregularities echoes power spectra; we are 
                         also able to deduce the Doppler shift caus ed by the 
                         irregularities drift in relation to the radar beam. Such drift is 
                         close related to the electric fields that drives the plasma 
                         instabilities. Through the analysis of the spectrograms (each one 
                         corresponding to one range gate) in disturbed periods, it has been 
                         possible to observe effects in the EEJ electric fields associated 
                         with possible prompt penetration (PP) electric fields. The PP 
                         electric fields show themselves as increases or decreases in the 
                         generation of 3-meter plasma irregularities, according to its 
                         polarity in relati on to the EEJ electric fields. This paper shows 
                         the RESCO spectrograms with increases/decreases of 3-meter EEJ 
                         irregularities generation associated with possible PP electric 
                         fields in geomagnetic disturbed days as well as the results of EEJ 
                         in quiet days. The methodology and the results are discussed and 
  conference-location = "San Juan",
      conference-year = "28 de novembro a 5 de dezembro",
           copyholder = "SID/SCD",
             language = "en",
                  ibi = "sid.inpe.br/MTC-m13@80/2005/",
                  url = "http://urlib.net/rep/sid.inpe.br/MTC-m13@80/2005/",
           targetfile = "geomagnetic.pdf",
        urlaccessdate = "18 abr. 2021"