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Spatial Extent of Quasiperiodic Emissions Simultaneously Observed by Arase and Van Allen Probes on 29 November 2018

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378289%3A_____%2F20%3A00539562" target="_blank" >RIV/68378289:_____/20:00539562 - isvavai.cz</a>

  • Alternative codes found

    RIV/00216208:11320/20:10423294

  • Result on the web

    <a href="https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1029/2020JA028126" target="_blank" >https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1029/2020JA028126</a>

  • DOI - Digital Object Identifier

    <a href="http://dx.doi.org/10.1029/2020JA028126" target="_blank" >10.1029/2020JA028126</a>

Alternative languages

  • Result language

    angličtina

  • Original language name

    Spatial Extent of Quasiperiodic Emissions Simultaneously Observed by Arase and Van Allen Probes on 29 November 2018

  • Original language description

    Recent availability of a considerable amount of satellite and ground-based data has allowed us to analyze rare conjugated events where extremely low and very low frequency waves from the same source region are observed in different locations. Here, we report a quasiperiodic (QP) emission, showing one-to-one correspondence, observed by three satellites in space (Arase and the Van Allen Probes) and a ground station. The main event was on 29 November 2018 from 12:06 to 13:08 UT during geomagnetically quiet times. Using the position of the satellites we estimated the spatial extent of the area where the one-to-one correspondence is observed. We found this to be up to 1.21 Earth's radii by 2.26 hr MLT, in radial and longitudinal directions, respectively. Using simple ray tracing calculations, we discuss the probable source location of these waves. At similar to 12:20 UT, changes in the frequency sweep rate of the QP elements are observed at all locations associated with magnetic disturbances. We also discuss temporal changes of the spectral shape of QP observed simultaneously in space and on the ground, suggesting the changes are related to properties of the source mechanisms of the waves. This could be linked to two separate sources or a larger source region with different source intensities (i.e., electron flux). At frequencies below the low hybrid resonance, waves can experience attenuation and/or reflection in the magnetosphere. This could explain the sudden end of the observations at the spacecraft, which are moving away from the area where waves can propagate.

  • Czech name

  • Czech description

Classification

  • Type

    J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database

  • CEP classification

  • OECD FORD branch

    10305 - Fluids and plasma physics (including surface physics)

Result continuities

  • Project

    <a href="/en/project/GA18-00844S" target="_blank" >GA18-00844S: Quasiperiodic modulation of magnetospheric plasma waves</a><br>

  • Continuities

    I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Others

  • Publication year

    2020

  • Confidentiality

    S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Data specific for result type

  • Name of the periodical

    Journal of Geophysical Research: Space Physics

  • ISSN

    2169-9380

  • e-ISSN

  • Volume of the periodical

    125

  • Issue of the periodical within the volume

    9

  • Country of publishing house

    US - UNITED STATES

  • Number of pages

    16

  • Pages from-to

    e2020JA028126

  • UT code for WoS article

    000600989000025

  • EID of the result in the Scopus database

    2-s2.0-85092603176