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Correlation Analysis of Lightning Whistlers Simultaneously Observed by Arase and Van Allen Probes
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SYSNO ASEP 0508363 Document Type A - Abstract R&D Document Type The record was not marked in the RIV R&D Document Type Není vybrán druh dokumentu Title Correlation Analysis of Lightning Whistlers Simultaneously Observed by Arase and Van Allen Probes Author(s) Kasahara, Y. (JP)
Ogawa, Y. (JP)
Ikarashi, S. (JP)
Matsuda, S. (JP)
Miyoshi, Y. (JP)
Tsuchiya, F. (JP)
Kumamoto, A. (JP)
Hikishima, M. (JP)
Santolík, Ondřej (UFA-U) RID, ORCID
Kolmašová, Ivana (UFA-U) RID, ORCID
Hospodarsky, G. (US)
Kletzing, C. (US)
Colpitts, Ch. (US)
Wygant, J. (US)
Matsuoka, A. (JP)Number of authors 15 Source Title Abstracts of AOGS : 16th Annual Meeting. - Singapore : Asia Oceania Geosciences Society, 2019
ST29-D3-PM1-304-002Number of pages 1 s. Publication form Online - E Action AOGS Annual Meeting /16./ Event date 28.07.2019 - 02.08.2019 VEvent location Singapore Country SG - Singapore Event type WRD Language eng - English Country SG - Singapore Keywords magnetosphere ; plasma waves ; lightning whistlers ; Van Allen Probes ; Arase Subject RIV BL - Plasma and Gas Discharge Physics OECD category Fluids and plasma physics (including surface physics) Institutional support UFA-U - RVO:68378289 Annotation The PWE is an instrument on board the Arase (ERG) to measure plasma waves in the inner magnetosphere. Because the inclination of Arase is 31 degrees, which is larger than the ones of Van Allen Probes (~10 degrees), this orbital configuration provides the ability to explore not only the equatorial region but also the off-equatorial region in the inner magnetosphere. We intensively conducted burst waveform measurements collaborating with the EMFISIS and EFW on board the Van Allen Probes during more than 200 conjunction periods. We identified correlated wave spectra such as chorus and lightning whistlers among the collaborative observation data. We introduce two typical events when similar lightning whistlers were observed by the Arase and Van Allen Probes. One is a case where the Arase and RBSP-A were located along the geomagnetic field line at L ~3. We could recognize multiple whistlers followed by reflected ones by both satellites. Correlation study and direction finding analysis showed that the direct waves from source region propagated southward, and the waves were reflected northward and were again reflected back southward. Another event is a case where the Arase and RBSP-B were located near the equatorial plane at L ~2.75 but 10 degrees apart in longitude. Similar lightning whistlers were observed that suggests the lightning whistler propagated spreading at least 10 degrees in longitude. We also found that the wave was detected by the RBSP-B ~0.1s earlier than the Arase, and the dispersion derived from the RBSP-B data was smaller than the one from Arase. This fact suggests that the whistler detected by the Arase experienced longer propagation path or denser plasma density along the path. In the presentation, we discuss the propagation characteristics of lightning whistlers and plasma environments clarified from the correlation analyses. Workplace Institute of Atmospheric Physics Contact Kateřina Adamovičová, adamovicova@ufa.cas.cz, Tel.: 272 016 012 ; Kateřina Potužníková, kaca@ufa.cas.cz, Tel.: 272 016 019 Year of Publishing 2020
Number of the records: 1