@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 = "11 maio 2024"
}