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Propagation characteristics of the VLF waves observed by the plasma wave experiment (PWE) on board the Arase - Collaborative observations with the Van Allen Probes

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    0497688 - ÚFA 2019 BE eng A - Abstract
    Kasahara, Y. - Matsuda, S. - Shoji, M. - Hikishima, M. - Santolík, Ondřej - Ishisaka, K. - Hospodarsky, G. - Kumamoto, A. - Kurita, S. - Yagitani, S. - Ota, M. - Kojima, H. - Colpitts, Ch. - Kletzing, C. - Ozaki, M. - Miyoshi, Y. - Matsuoka, A. - Wygant, J. - Tsuchiya, F. - Kasaba, Y. - Katoh, Y.
    Propagation characteristics of the VLF waves observed by the plasma wave experiment (PWE) on board the Arase - Collaborative observations with the Van Allen Probes.
    2 nd URSI AT-RASC Proceedings. Gent: URSI, 2018.
    [URSI Atlantic Radio Science Meeting (AT-RASC) /2./. 28.05.2018-01.06.2018, Gran Canaria]
    Institutional support: RVO:68378289
    Keywords : very low frequency (VLF) waves * extremely low frequency (ELF) waves * plasma waves * Van Allen Probes
    OECD category: Fluids and plasma physics (including surface physics)
    http://www.ursi.org/proceedings/procAT18/papers/kasahara.pdf

    The Plasma Wave Experiment (PWE) is one of scientific instruments on board the Arase (ERG) satellite
    launched on December 20, 2016 to measure electric field from DC to 10 MHz and magnetic field from a few Hz
    to 100 kHz in the inner magnetosphere [1). Varieties of operation modes are implemented in the PWE, and the
    data products from the PWE are classified into continuous data and burst data. The continuous data consists of
    waveform in ELF range and wave spectra in ELF/VLF/HF range for surveying the entire observation. We also
    produce spectral matrices as continuous data to derive wave normal direction and Poynting flux of the plasma
    waves detected by the PWE. On the other hand, the burst data is used for waveform measurements less than 20
    kHz, but the data are intermittently obtained due to the limitation of the telemetry capacity. As the Arase carries
    a huge mission data recorder (MDR), we store the intermittent waveform data in the MDR and transmit them to
    the ground after data selection.
    Since mid-March, 2017, we have been operating the PWE
    optimizing its observation mode and data selection process according to the decision at the weekly data-survey
    meeting. In addition, we also performed collaborative observations with the ground-based stations, Van Allen
    Probes and the other satellites in the magnetosphere. We intensively conducted the burst mode operations, by
    which huge amount of waveforms were continuously captured and downloaded to the ground. During the
    conjunction periods between the Arase and Van Allen Probes in summer, 2017, we could identify several
    correlated wave spectra for both satellites. Although the orbit of the Arase satellite is quite similar to the ones of
    the Van Allen Probes, it is important to note that the inclination of Arase (31°) is much larger than the ones of
    Van Allen Probes (~ 10°), which will allow us to study propagation characteristics of plasma waves not only in
    the equatorial region but also in the off-equatorial region.
    Permanent Link: http://hdl.handle.net/11104/0290206

     
     
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