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@Article{EcherGonzAlve:2006:MiVaAn,
               author = "Echer, Ezequiel and Gonzalez, Walter Dem{\'e}trio and Alves, 
                         Maria Virginia",
          affiliation = "Instituto Nacional de Pesquisas Espaciais, Divis{\~a}o de 
                         Geof{\'{\i}}sica Espacial (INPE.DGE) and Instituto Nacional de 
                         Pesquisas Espaciais, Divis{\~a}o de Geof{\'{\i}}sica Espacial 
                         (INPE.DGE) and {Instituto Nacional de Pesquisas Espaciais}",
                title = "Minimum variance analysis of interplanetary coronal mass ejections 
                         around solar cycle 23 maximum (1998-2002)",
              journal = "Solar Physics",
                 year = "2006",
               volume = "233",
               number = "2",
                pages = "249--263",
                month = "Feb.",
             keywords = "MAGNETIC CLOUDS, FIELD, SOLAR-CYCLE-23, VOYAGER.",
             abstract = "The minimum variance analysis of interplanetary coronal mass 
                         ejections (ICMEs) observed close to the Earth's orbit around solar 
                         cycle 23 maximum (1998-2002) was performed. The ICMEs were 
                         classified in three categories: magnetic clouds (MC), undefined 
                         ejecta (UE), and complex ejecta (CE). An analysis of the full 
                         ICMEs set shows that the average of minimum variance direction 
                         inclination angle is 1.6 degrees +/- 24.8 degrees in relation to 
                         the ecliptic plane, with more than 33% of the events presenting 
                         inclination angles lower than 10 degrees. The average of minimum 
                         variance direction azimuthal angle (in relation to the Sun-Earth 
                         line) was 56 degrees. However, around 60% of the ICMEs presented 
                         an azimuthal angle lower than 30 degrees, close to the radial 
                         direction. It was also observed that the MC set had lower axial 
                         (intermediate variance) inclinations relative to the ecliptic 
                         plane than the UE and CE events. The intermediate variance axis is 
                         close to 90 degrees to the Sun-Earth line. The results obtained in 
                         the present analysis were also compared with previous works, 
                         permitting a comparison of the ICMEs orientations in solar cycle 
                         23 with previous sor cycles.",
           copyholder = "SID/SCD",
                 issn = "0038-0938 and 1573-093X",
             language = "en",
           targetfile = "Minimum variance analysis of interplanetary.pdf",
        urlaccessdate = "17 jan. 2021"
}


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