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@InProceedings{CintraFernRosaSodr:2018:StStTy,
               author = "Cintra, M. A. U. and Fernandes, F. C. R. and Rosa, Reinaldo 
                         Roberto and Sodr{\'e}, Z. A. L.",
          affiliation = "{Universidade do Vale do Para{\'{\i}}ba (UNIVAP)} and 
                         {Universidade do Vale do Para{\'{\i}}ba (UNIVAP)} and {Instituto 
                         Nacional de Pesquisas Espaciais (INPE)} and {Universidade do Vale 
                         do Para{\'{\i}}ba (UNIVAP)}",
                title = "Studying the stochasticity of type I solar storms with gradient 
                         spectra",
                 year = "2018",
         organization = "Latin American Conference on Space Geophysics, 11. (COLAGE)",
             abstract = "It is known that Type I solar emissions are generated by 
                         non-thermal electrons accelerated by structural variations in the 
                         active regions magnetic configuration. Most of the Type I bursts 
                         is recorded as a sequence of individual bursts characterizing the 
                         so-called chains of Type I. They, also, could be associated with 
                         solar flares. In this case, the flare dissipative energy is added 
                         to the energy released by small changes in magnetic distribution, 
                         which increases the duration of Type I storms. One of the major 
                         challenges to this context is to characterize the underlying 
                         stochastic process best suited to describe the noise patterns of 
                         Type I storms. We consider that a first step in this direction is 
                         to find or discard similarities with type 1/f noises. In this 
                         work, by applying the Gradient Pattern Analysis (GPA), we compared 
                         the gradient spectra of Type I storms with canonical gradient 
                         spectra generated by White, Pink and Red Noises. The data are time 
                         series of Type I bursts recorded in metric wavelengths (65 - 865 
                         MHz) by the Compound Astronomical Low cost Low frequency 
                         Instrument for Spectroscopy and Transportable Observatory 
                         (CALLISTO) spectrographs. The results accurately indicate that the 
                         gradient spectra of Type I solar noise storms captured from 
                         CALLISTO are distinct from all type 1/f noises. Thus, considering 
                         the results presented here, purely stochastic mechanisms can be 
                         discarded as being the major underlying process associated with 
                         the plasma dynamics of the phenomenon. In addition, we discuss, 
                         from a technical perspective, the advantages of applying GPA over 
                         Power Spectral Density (PSD) due to its greater robustness for 
                         short series.",
  conference-location = "Buenos Aires, Argentina",
      conference-year = "16-20 abr.",
             language = "en",
        urlaccessdate = "01 dez. 2020"
}


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