@Article{SouzaFränEcheBolz:2019:StStME,
               author = "Souza, Adriane Marques de and Fr{\"a}nz, Markus and Echer, 
                         Ezequiel and Bolzan, Maur{\'{\i}}cio Jos{\'e} Alves",
          affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and {Max Planck 
                         Institute for Solar System Research} and {Instituto Nacional de 
                         Pesquisas Espaciais (INPE)} and {Universidade Federal de 
                         Jata{\'{\i}}}",
                title = "Correlation length around Mars: a statistical study with MEX and 
                         MAVEN observations",
              journal = "Earth and Planetary Physics",
                 year = "2019",
               volume = "3",
                pages = "1--10",
             keywords = "Mars Magnetosphere, Correlation length, ULF waves.",
             abstract = "Correlation lengths of ultra-low-frequency (ULF) waves around Mars 
                         were computed for the first time, using data from MEX (electron 
                         density from 2004 to 2015) and MAVEN (electron density and 
                         magnetic field from 2014 to 2016). Analysis of the MEX data found 
                         that, for the frequency range 8 to 50 mHz, correlation length in 
                         electron density varied between 13 and 17 seconds (temporal scale) 
                         and between 5.5 × 103 km and 6.8 × 103 km (spatial scale). For the 
                         MAVEN time interval, correlation length was found to vary between 
                         11 and 16 seconds (temporal scale) and 2 × 103 4.5×103 km in 
                         spatial scale. In the magnetic field data, correlation lengths are 
                         observed to be between 815 seconds (temporal scale) and between 1 
                         × 103 and 5 × 103 km (spatial scale) over the same frequency 
                         range. We observe that the cross sections of the plasma regions at 
                         the dayside of Mars are smaller than these correlation lengths in 
                         these regions in both analyses, where the correlation length 
                         derived from the MEX electron density data was between 5 and 25 
                         times the size of the magnetosheath and the magnetic pile-up 
                         region (MPR), respectively. For MAVEN these ratios are about 4 
                         (magnetosheath) and 11 (MPR) in electron density and between 1.5 
                         and 5.5 for magnetic field data, respectively. These results 
                         indicate that waves at the magnetosheath/MPR can be related to 
                         oscillations in the upper ionosphere. In a local region, wave 
                         trains may cause resonance effects at the planetary ionopause, 
                         which consequently contributes to the enhanced ion escape from the 
                         atmosphere.",
                  doi = "10.26464/epp2019051",
                  url = "http://dx.doi.org/10.26464/epp2019051",
                 issn = "2096-3955",
                label = "lattes: 7391173291748956 1 SouzaFr{\"a}nEcheBolz:2019:StStME",
             language = "en",
        urlaccessdate = "20 abr. 2024"
}