Počet záznamů: 1
Spatial Extent of Quasiperiodic Emissions Simultaneously Observed by Arase and Van Allen Probes on 29 November 2018
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SYSNO ASEP 0539562 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Spatial Extent of Quasiperiodic Emissions Simultaneously Observed by Arase and Van Allen Probes on 29 November 2018 Tvůrce(i) Martinez-Calderon, C. (JP)
Němec, F. (CZ)
Katoh, Y. (JP)
Shiokawa, K. (JP)
Kletzing, C. (US)
Hospodarsky, G. (US)
Santolík, Ondřej (UFA-U) RID, ORCID
Kasahara, Y. (JP)
Matsuda, S. (JP)
Kumamoto, A. (JP)
Tsuchiya, F. (CZ)
Matsuoka, A. (JP)
Shoji, M. (JP)
Teramoto, M. (JP)
Kurita, S. (JP)
Miyoshi, Y. (JP)
Ozaki, M. (JP)
Nishitani, N. (JP)
Oinats, A. V. (RU)
Kurkin, V. I. (RU)Celkový počet autorů 20 Číslo článku e2020JA028126 Zdroj.dok. Journal of Geophysical Research-Space Physics. - : Wiley - ISSN 2169-9380
Roč. 125, č. 9 (2020)Poč.str. 16 s. Jazyk dok. eng - angličtina Země vyd. US - Spojené státy americké Klíč. slova VLF ; ELF ; spatial extent ; conjugated events ; ERG ; RBSP ; quasiperiodic emissions Vědní obor RIV BL - Fyzika plazmatu a výboje v plynech Obor OECD Fluids and plasma physics (including surface physics) Způsob publikování Omezený přístup Institucionální podpora UFA-U - RVO:68378289 UT WOS 000600989000025 EID SCOPUS 85092603176 DOI 10.1029/2020JA028126 Anotace 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. Pracoviště Ústav fyziky atmosféry Kontakt Kateřina Adamovičová, adamovicova@ufa.cas.cz, Tel.: 272 016 012 ; Kateřina Potužníková, kaca@ufa.cas.cz, Tel.: 272 016 019 Rok sběru 2021 Elektronická adresa https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1029/2020JA028126
Počet záznamů: 1