Properties of quasi-periodic ELF/VLF emissions from a conjugated event between the Arase satellite, Van Allen Probes A, and B

0508487 - ÚFA 2020 DE eng A - Abstrakt
Martinez-Calderon, C. - Němec, F. - Katoh, Y. - Shiokawa, K. - Kasahara, Y. - Matsuda, S. - Fuminori, T. - Kumamoto, A. - Teramoto, M. - Matsuoka, A. - Miyoshi, Y. - Santolík, Ondřej - Hospodarsky, G.
Properties of quasi-periodic ELF/VLF emissions from a conjugated event between the Arase satellite, Van Allen Probes A, and B.
IUGG 2019 Abstract Book. Potsdam: International Union of Geodesy and Geophysics, 2019. A07p-003.
[IUGG General Assembly /27./. 08.07.2019-18.07.2019, Montréal]
Institucionální podpora: RVO:68378289
Klíčová slova: magnetosphere * plasma waves * extremely low frequency (ELF) emission * very low frequency (VLF) emissions * Van Allen Probes * Arase satellite
Obor OECD: Fluids and plasma physics (including surface physics)
http://iugg2019montreal.com/abstract-book.html

Extremely Low (ELF) and Very Low Frequency (VLF) emissions in the 3Hz to 30 kHz frequency range are plasma waves naturally present in the magnetosphere. ELF/VLF waves can interact through cyclotron resonance with electrons in the radiation belts, accelerate or scatter them, and play a fundamental role in the belt dynamics. Even now, ELF/VLF conjugated events between satellites or between satellites and ground receivers remains rare with only a few reported events. Here, we report the first quasi-periodic (QP) emission simultaneously observed by the Arase (ERG) satellite, Van Allen Probes A, and B (RBSP). The event was observed on November 29, 2018 from approximately 11 to 13:30 UT by both RBSP, while ERG observed it from 12 to 14 UT. All three spacecraft observed very similar frequency-temporal features. Using the intensities measured at different locations we discuss the approximate location of the source of the emissions. From wave analysis and propagation parameters we discuss the propagation of the waves through the magnetosphere using preliminary ray tracing. We will also discuss the eventual periodicity and spectral shape differences between QP elements at different locations. Data from RBSP suggests that this event is related to an extension of a hiss emission to higher frequencies. We will use the event parameters to discuss this possibility. Finally, considering the data related to this event and other coordinated fly-bys, we hope to increase our chances of future conjugated events between the three spacecraft.
Trvalý link: http://hdl.handle.net/11104/0299396