資料6-H

Japanese URSI Commission H (Waves in Plasmas)
Activity Report
July 2018 - March 2019[1] Status of projects related with plasma wave observation
1.

BepiColombo/MMO

2.

JUICE

3.

http://global.jaxa.jp/projects/sat/bepi/
http://www.stp.isas.jaxa.jp/mercury/p_mmo.html
BepiColombo is a Mercury exploration project jointly planned by JAXA and the European Space
Agency (ESA), launched in Oct., 2018 from Kourou (Aarrival at Mercury in 2025). It consists of
two orbiters; the Mercury Planetary Orbiter (MPO) and the Mercury Magnetosphere Orbiter(MMO) whose nickname becomes 'MIO'. JAXA is responsible for the latter.
For the plasma wave, Plasma Wave Investigation (PI: Y. Kasaba [Tohoku Univ.]) is aboard thisspacecraft. PWI will first observe electric field, plasma waves, and radio waves around Mercury,which were not covered by past missions. The PWI science team is now shifting to develop thetelemetry data pipelines and operation planning for the real science execution which will be
realized in 2020s. The first step will be the Venus flyby in 2020.

http://sci.esa.int/juice/
JUICE (JUpiter ICy moons Explorer) is the L-class mission of ESA, planned for launch in 2022
and arrival at Jupiter in 2029. It will spend at least three years making detailed observations of
the Jovian system including Ganymede, Calisto and Europa, and finally be on the orbit around
Ganymede. For the plasma wave, Radio and Plasma Wave Investigation (PI: J.-E. Wahlund [IRF
Uppsala, Sweden]) is aboard this spacecraft and covers the information of the exospheres,
surfaces, and conducting subsurface oceans of icy satellites and their interactions withsurrounding Jovian magnetosphere. For the access to the conductive subsurface ocean, RPWI
will first observe cold plasma and electric fields, in order to separate the global conductivity andcurrent from the ionospheres. As a byproduct, reflected Jovian radio emission can be expectedfrom the boundary of crust (ice) and subsurface ocean (conductive water). From Japan, HighFrequency part (RWI-Preamp and HF-Receiver) will be supplied (Co-PI: Y. Kasaba [Tohoku
Univ.]) and provide the highly resolved information of Jovian radiation emitted from Jupiter andGanymede by the first 3-axis E-field measurement. We already shipped Engineering Model,
Structural and Thermal Model and Qualification Model to Europe. We will manufacture and ship
the Flight Model (RWI-preamp) and Proto-Flight Model (HF-Receiver) in 2019.

Arase (ERG)

http://ergsc.isee.nagoya-u.ac.jp/index.shtml.en
https://ergsc.isee.nagoya-u.ac.jp/mw/
The Arase (ERG; Exploration of energization and Radiation in Geospace) project is a mission to
study acceleration and loss mechanisms of relativistic electrons around the Earth. The Arase(ERG) was launched in Dec., 2016, and the prime mission started in March, 2017. The Plasma
Wave Experiment (PWE, PI: Y. Kasahara [Kanazawa Univ.]) has measured DC electric field andplasma waves in the inner magnetosphere covering wide frequency range from DC to 10 MHz
for electric field and from a few Hz to 100 kHz for magnetic field. The Software-Wave Particle
Interaction Analyzer (SWPIA) (PI: H. Kojima, [Kyoto. Univ.]) is equipped to realize direct
measurements of interactions between energetic electrons and whistler-mode chorus in the Earth's
inner magnetosphere.
Varieties of wave phenomena such as chorus, EMIC, ULF pulsations and lightning
whistlers have been successfully observed by the PWE. We have also conducted資料6-H

cooperative observations with the ground-based stations, Van Allen Probes and theother satellites in the magnetosphere. We intensively conducted the PWE burst
mode operations, by which waveforms were continuously captured. During theprime mission, all science instruments have operated in good health and the JAXA
has approved the mission extension of Arase until end of March, 2022.

4.

5.

PWING Project

http://www.isee.nagoya-u.ac.jp/dimr/PWING/en/
The PWING project investigates the process of dynamical variation of the particles and waves inthe Earth’s inner magnetosphere and clarify the mechanism of the dynamical variation
quantitatively. This project has operated eight ground-based stations separately positioned in thelongitudinal direction at subauroral latitudes in Canada, Alaska, Russia, Finland, and Iceland,
using induction magnetometers, riometers, VLF/ELF receivers, and all-sky airglow/aurora
imagers and EMCCD cameras since March 2017. Conjugate measurements of particles andwaves with the new ERG (Arase) satellite and the Van Allen Probes has been made extensively
in 2017-2019.

Ground-based observation of solar and planetary radio waves

http://pparc.gp.tohoku.ac.jp/data/iprt/index.html
http://ariel.gp.tohoku.ac.jp/jupiter/
Ground-based observation of solar and planetary radio waves is performed using IPRT (Iitate
Planetary Radio Telescope) and HF antenna array developed by Tohoku University. IPRT has
been operated at the Iitate observatory in Fukushima Japan since 2000. IPRT measures meter todecimeter natural radio waves at fixed frequencies of 325 and 785 MHz using LNA and also from150 to 500 MHz using wide-band receiver. Primary purposes of the telescope are to investigate
the dynamic behavior of Jupiter's synchrotron radiation and solar radio emissions in the lowfrequency range. In addition to this, IPRT has capability to observe weak radio sources in the low
frequency range such as pulsars. HF antenna array has been operated since 1974 for ground-based
observation of Jovian decametric radiation (DAM; 15-40MHz). Wide-band spectrum monitor,
and waveform receiver with single antenna, and long-baseline interferometer with 3 station's
antenna (Kawatabi, Zao, and Yoneyama) are in operation. For observation of weaker non-Io
Jovian DAM events, we started updating short-baseline interferometer, which was stopped due
to aging of previous system.

6.

Hisaki spacecraft

7.

GEOTAIL

http://global.jaxa.jp/projects/sat/sprint_a/
Hisaki satellite with the EUV spectrometer (Extreme Ultraviolet Spectroscope for Exospheric
Dynamics: EXCEED) is the UV/EUV space telescope dedicated to planetary sciences.
Hisaki has provided continuous observations of Jovian system in UV aurora total flux and EUV
Io torus plasma distributions and plasma diagnostics, which connected the solar wind informationand ground-based radio (Decameter [aurora] - VHF [radiation belt]) and IR (aurora and airglows)
observations. From July 2016, NASA Juno orbiter started the observation around Jupiter. Hisaki’s
priority is on the support observation for this mission. The HISAKI mission period has extended
until the end of Mar. 2020.

GEOTAIL spacecraft has been operated since 1992. The Plasma Wave Instrument (PWI) is
continuously collecting the high resolution waveform data as well as the spectrum data. The color
plots of the observed wave spectrum data have been opened in the PWI web site
http://www.rish.kyoto-u.ac.jp/gtlpwi, and http://www.stp.isas.jaxa.jp/geotail. Furthermore, one
can easily also make the color spectrum plots in flexible time scales in the NICT web page

資料6-H

http://geotail.nict.go.jp/.

[2] Recent Meetings
1.

Magnetospheres of Outer Planets Conference, LASP, Colorado, USA, 9-13 July, 2018.
http://lasp.colorado.edu/home/mop/mop2018/https://lists.colorado.edu/sympa/info/mop_conference
2. The 42nd COSPAR Scientific Assembly, Pasadena Convention Center, USA, 14-22 July, 2018.
http://cospar2018.org/
3. JUICE-Clipper science workshop, Pasadena, USA, 22 July, 2018.
4. The 40th Progress In Electromagnetics Research Symposium (PIERS), Toyama, Japan, 1-4
August, 2018.
http://piers.org/piers2018Toyama/
5. Workshop on plasma physics in laboratory, space and astrophysics (The 378th Symposium on
Sustainable Humanosphere), Fukuoka, Japan, 20-21 Aug., 2018.
6. The 13th International School/Symposium for Space Simulations (ISSS-13), UCLA, September
6-14, 2018.
https://conferences.pa.ucla.edu/ISSS13/
7. The 13th European Planetary Science Congress, TU Berlin, Germany, 16-21 September, 2018.
https://www.epsc2018.eu/
8. JUICE Magnetosphere and Plasma Science Workshop #1, European Space Astronomy Centre(ESAC) Madrid, 26-28 September, 2018.
9. 2nd Asia-Pacific Conference on Plasma Physics (AAPPS-DPP2018), Kanazawa, Japan, 12-17
November, 2018.
http://www.aappsdpp.org/DPP2018/
10. SGEPSS Fall Meeting, Nagoya, Japan, 24-28 November, 2018.
http://sgepss.org/sgepss/
11. American Geophysical Union Fall Meeting, Wahington D.C., U.S.A., 10-14 December, 2018.
http://fallmeeting.agu.org/2018/
12. European Geosciences Union (EGU) General Assembly 2019, Vienna, Austria, 7-12 April, 2019.
http://www.egu2019.eu/[3] Future Meetings
1.
2.
3.
4.
5.
6.
7.
8.
9.

Japan Geoscience Union Meeting 2019, Chiba, Japan, 26-30 May, 2019.
http://www.jpgu.org/meeting_e2019/
16th Annual Meeting of Asia Oceania Geosciences Society, Singapore, 28 July-2 August, 2019.
http://www.asiaoceania.org/society/index.asp
Magnetospheres of Outer Planets (MOP) Conference 2019, Sendai, Japan, 3-7 June, 2019.
http://lasp.colorado.edu/home/mop/resources/mop-conference/SuperDARN workshop 2019, Fujiyoshida, Japan, 2-9 June, 2019.
http://superdarn2019.nict.go.jp/
VarSITI completion symposium, Sofia, Bulgaria, 10-14, 2019.
http://newserver.stil.bas.bg/VarSITI2019/32nd International Symposium on Space Technology and Science (ISTS), Fukui, Japan, 15-21
June, 2019.
https://www.ists.or.jp/
The 27th IUGG General Assembly, Montréal, Québec, Canada, 8-18, July, 2019.
http://iugg2019montreal.com/
Workshop on radio science and radio application technology (Symposium on Sustainable
Humanosphere), Kanazawa, Japan, 24-25(TBC) September, 2019.
American Geophysical Union Fall Meeting, San Francisco, U.S.A., 9-13 December, 2019.

資料6-H[4] Recently Published Papers

Angelopoulos, V., P. Cruce, A. Drozdov, E.W. Grimes, N. Hatzigeorgiu, D.A. King, D. Larson,
J.W. Lewis, J.M. McTiernan, D.A. Roberts, C.L. Russell, T. Hori, Y. Kasahara, A. Kumamoto,
A. Matsuoka, Y. Miyashita, Y. Miyoshi, I. Shinohara, M. Teramoto, J.B. Faden, A.J. Halford, M.
McCarthy, R.M. Millan, J.G. Sample, D.M. Smith, L.A. Woodger, A. Masson, A.A. Narock, K.
Asamura, T.F. Chang, C.-Y. Chiang, Y. Kazama, K. Keika, S. Matsuda, T. Segawa, K. Seki, M.
Shoji, S.W.Y. Tam, N. Umemura, B.-J. Wang, S.-Y. Wang, R. Redmon, J.V. Rodriguez, H.J.
Singer, J. Vandegriff, S. Abe, M. Nose, A. Shinbori, Y.-M. Tanaka, S. UeNo, L. Andersson, P.
Dunn, C. Fowler, J.S. Halekas, T. Hara, Y. Harada, C.O. Lee, R. Lillis, D.L. Mitchell, M.R. Argall,
K. Bromund, J.L. Burch, I.J. Cohen, M. Galloy, B. Giles, A.N. Jaynes, O. Le Contel, M. Oka,
T.D. Phan, B.M. Walsh, J. Westlake, F.D. Wilder, S.D. Bale, R. Livi, M. Pulupa, P. Whittlesey, A.
DeWolfe, B. Harter, E. Lucas, U. Auster, J.W. Bonnell, C.M. Cully, E. Donovan, R.E. Ergun, H.U.
Frey, B. Jackel, A. Keiling, H. Korth, J.P. McFadden, Y. Nishimura, F. Plaschke, P. Robert, D.L.
Turner, J.M. Weygand, R.M. Candey, R.C. Johnson, T. Kovalick, M.H. Liu, R.E. McGuire, A.
Breneman, K. Kersten, and P. Schroeder, The Space Physics Environment Data Analysis System(SPEDAS), Space Science Review, 215(1), doi:10.1007/s11214-018-0576-4, 2019.
 The Space Physics Environment Data Analysis System (SPEDAS), a grass-roots softwaredevelopment platform (www.spedas.org), is now officially supported by NASA Heliophysics aspart of its data environment infrastructure.
 We review the SPEDAS development history, goals, and current implementation, and explain its“modes of use” with examples geared for users and outline its technical implementation andrequirements with software developers in mind.
Fukizawa, M., T. Sakanoi, Y. Miyoshi, K. Hosokawa, K. Shiokawa, Y. Katoh, Y. Kazama, A.
Kumamoto, F. Tsuchiya, Y. Miyashita, Y. �M. Tanaka, Y. Kasahara, M. Ozaki, A. Matsuoka, S.
Matsuda, M. Hikishima, S. Oyama, Y. Ogawa, S. Kurita, and R. Fujii, Electrostatic electron
cyclotron harmonic waves as a candidate to cause pulsating auroras. Geophys. Res. Lett., 45,
https://doi.org/10.1029/2018GL080145, 2018.
 The lower-band chorus and electrostatic electron cyclotron harmonic wave intensities hadcorrelation with the pulsating auroral intensity.
 Taking advantage of high sampling rate of the imager, we estimated the energy of precipitating
electrons.
 The energy of precipitating electrons was reasonable compared with the cyclotron resonanceenergy of each wave.
Hashimoto. K., Atsushi Kumamoto, Fuminori Tsuchiya, Yoshiya Kasahara, Ayako Matsuoka,
Hectometric Line Spectra Detected by the Arase (ERG) Satellite, Geophys. Res. Lett., 45,
https://doi.org/10.1029/2018GL080133, 2018.
 Hectometric line spectra (HLS) composed of line emissions from 525 to 1,700 kHz were
frequently observed by Arase, suggesting a broadcasting wave is partially mode-converted to the
Z mode at low-density with steep density gradient regions such as plasma bubbles.
 The Z-mode waves can be also mode-converted to the L-O mode and propagate widely in thelower density side of the density gradient surface.
Hirai, A., F. Tsuchiya, T. Obara, Y. Kasaba, Y. Katoh, H. Misawa, K. Shiokawa, Y. Miyoshi, S.
Kurita, S. Matsuda, M. Connors, T. Nagatsuma, K. Sakaguchi, Y. Kasahara, A. Kumamoto, A.
Matsuoka, M. Shoji, I. Shinohara, and J. M. Albert, Temporal and Spatial Correspondence of
Pc1/EMIC Waves and Relativistic Electron Precipitations Observed with Ground�BasedMulti�Instruments on 27 March 2017. Geophys. Res. Lett., 45, 24, 13,182-13,191.
https://doi.org/10.1029/2018GL080126, 2018.
 Relativistic electron precipitation and electromagnetic ion cyclotron waves were observed during
the main phase of a geomagnetic storm.
 Isolated proton auroras appeared on the radio propagation paths on which relativistic electron資料6-H

precipitation was detected.
We found a good correspondence between the time variations of relativistic electron precipitationand electromagnetic ion cyclotron waves

Kasaba, Y., T. Takashima, M. N. Nishino, and M. Fujimoto, Science operation concept of
BepiColombo/MMO based on the MDP scheme, Proc. International Sympo. Planetary Science
2011, ed. S. Okano, Y. Kasaba, H. Misawa, pp.1-11. TERRAPUB, Tokyo, doi:10.5047/pisps.001,
2019.
 Science Payloads of BepiColombo MMO is operated through the MDP, and act as an integrated
measurement system observing charged and energetic neutral particles, magnetic and electricfields, plasma waves, radio waves, dust, and exospheric constituents with a coordinated manner
within our limited telemetry resource.
Kataoka, R., T. Nishiyama, Y. Tanaka, A. Kadokura, H. A. Uchida, Y. Ebihara, M. K. Ejiri, Y.
Tomikawa, M. Tsutsumi, K. Sato, Y. Miyoshi, K. Shiokawa, S. Kurita, Y. Kasahara, M. Ozaki,
K. Hosokawa, S. Matsuda, I. Shinohara, T. Takashima, T. Sato, T. Mitani, T. Hori, and N.
Higashio, Transient ionization of the mesosphere during auroral breakup: Arase satellite andground-based conjugate observations at Syowa Station, Earth, Planets and Space, 71(1), doi:
10.1186/s40623-019-0989-7, 2019.
 Transient mesospheric echo in the VHF range was detected at an altitude of 65–70 km during theauroral breakup that occurred from 2220 to 2226 UT on June 30, 2017.
 They demonstrated that the precipitation of energetic electrons of > 100 keV, rather than X-rays
from the auroral electrons, played a dominant role in the transient and deep (65–70 km)
mesospheric ionization during the observed auroral breakup.
Kazama, Y., H. Kojima, Y. Miyoshi, Y. Kasahara, H. Usui, B.-J. Wang, S.-Y. Wang, S. W. Y. Tam,
T.-F. Chang, P. T. P. Ho, K. Asamura, A. Kumamoto, F. Tsuchiya, Y. Kasaba, S. Matsuda, M.
Shoji, A. Matsuoka, M. Teramoto, T. Takashima, and I. Shinohara, Density Depletions
AssociatedWith Enhancements of Electron Cyclotron Harmonic Emissions: An ERG
Observation, Geophys. Res. Lett., 45, https://doi.org/10.1029/2018GL080117, 2018.
 The Arase observed an event near the magnetic equator where plasmapause had small-scaledensity depletions of cold electrons (<10eV) associated with enhancements of ECH waves.
 Enhancements of hot-electron fluxes (<1keV) perpendicular to the local magnetic field were
probably due to perpendicular energization of cold electrons by the ECH waves.
Kawamura, S., K. Hosokawa, S. Kurita, S. Oyama, Y. Miyoshi, Y. Kasahara, M. Ozaki, S.
Matsuda, A. Matsuoka, B. Kozelov, Y. Kawamura, and I. Shinohara, Tracking the region of highcorrelation between pulsating aurora and chorus: simultaneous observations with Arase satellite
and ground‐based all‐sky imager in Russia, J. Geophys. Res. 124, doi: 10.1029/2019JA026496,
2019.
 An extended interval of PsA (~1 h) simultaneously observed by a newly launched magnetosphericsatellite, Arase, and a ground‐based high‐speed all‐sky imager in Apatity, Kola Peninsula,
Russia was investigated.
 The correspondence between PsA and chorus was verified, and the motion of the high-correlation
region (correlation coefficient >0.5) was also successfully tracked in a continuous manner.
Kim, H., J. Hwang, J. Park, Y. Miyashita, K. Shiokawa, I. R. Mann, T, Raita, and J. Lee, Large
scale ducting of Pc1 pulsations observed by Swarm satellites and multiple ground networks,
Geophys. Res. Lett., 45, doi:10.1029/2018GL080693, 2018.
 This paper reports large scale ducting of Pc1 pulsations observed by the Swarm satellites andmultiple ground networks including PWING induction magnetometers.
Kimura, T., Y. Hiraki, C. Tao, F. Tsuchiya, P. A. Delamere, K. Yoshioka, G. Murakami, A.
Yamazaki, H. Kita, S. V. Badman, K. Fukazawa, I. Yoshikawa, and M. Fujimoto, Response of資料6-H

Jupiter's Aurora to Plasma Mass Loading Rate Monitored by the Hisaki Satellite During
Volcanic Eruptions at Io, J. Geophys. Res. 123, doi:10.1002/2017JA025029, 2018.
 Response of Jupiter’s aurora to mass loading from Io was investigated with a newly developedmodel and data from the Hisaki satellite.
 The estimated mass loading rate indicated increase and decay during volcanic eruptions at Io.
 During volcanic eruptions at Io, impulsive variation of aurora responded to the mass loading rate
rather than the solar wind.
Kimura, T., A. Yamazaki, K. Yoshioka, G. Murakami, F. Tsuchiya, H. Kita, C. Tao, I. Yoshikawa,and C. Yamauchi, Development of ground pipeline system for high-level scientific data productsof the Hisaki satellite mission and its application to planetary space weather, J. Space Weather
Space Clim., 9, A8, doi:10.1051/swsc/2019005, 2019.
 This paper describes a data pipeline system developed for processing high-level scientific andancillary data products from the Hisaki mission. Continuous monitoring with Hisaki willcontribute considerably to our understanding of space weather relating to planets in our solar
system.
Kita, H,. H. Misawa, A. Bhardwaj, F. Tsuchiya, G. Murakami, C. Tao, T. Kimura, K. Yoshioka,
A. Yamazaki, Y. Kasaba, I. Yoshikawa, and M. Fujimoto, Short-term variation in the dawn-dusk
asymmetry of the Jovian radiation belt obtained from GMRT and Hisaki EXCEED observations,Astrophys. J. Lett., 872:L24, doi:10.3847/2041-8213/ab0427, 2019.
 In order to reveal variations of days to weeks in the brightness distribution of Jovian Synchrotron
Radiation (JSR), this paper reported analysis results of simultaneous radio and ultraviolet
observations using the Giant Metrewave Radio Telescope (GMRT) and the Hisaki EXCEED. The
statistical analysis indicates that JSR and IPT do not have a significant correlation.
Kis, A., S. Matsukiyo, F. Otsuka, T. Hada, I. Lemperger, I. Dandouras, V. Barta, and G. Facsko,
Effect of upstream ULF waves on the energetic ion diffusion at the earth's foreshock, II:
Observations, Astrophys. J., doi:10.3847/1538-4357/aad08c, 863, 136(9pp), 2018.
 Using Cluster data, the e-folding distance and the diffusion coefficient of the diffuse ions in the
Earth’s foreshock is measured. It is shown that the e-folding distance and the diffusion coefficient
become unusually small when the diffuse ions interact with high intensity waves generated by astrong field-aligned beam.
Koga, R., F. Tsuchiya, M. Kagitani, T. Sakanoi, M. Yoneda, K. Yoshikawa, T. Kimura, G.
Murakami, A. Yamazaki, and I. Yoshikawa, The time variation of atomic oxygen emission
around Io during a volcanic event observed with Hisaki/EXCEED, Icarus 200, 300-307,
doi:10.1016/j.icarus.2017.07.024, 2018.
 The brightening of Io's extended nebula was observed in the spring of 2015.
 Atomic oxygen emission around Io also increased during the same period.
 There was a dawn-dusk asymmetry of atomic oxygen emission.
Koga, R., F. Tsuchiya, M. Kagitani, T. Sakanoi, M. Yoneda, K. Yoshioka, I. Yoshikawa, T. Kimura,
G. Murakami, A. Yamazaki, H. T. Smith, and F. Bagenal, Spatial Distribution of Io's Neutral
Oxygen Cloud Observed by Hisaki, J. Geophys. Res., 123, https://doi.org/10.1029/2018JA025328,
2018.
 Io's neutral oxygen cloud consists of a leading cloud inside the orbit and a longitudinally uniform
region spreading out to 7.6 RJ.
 The estimated peak number density of oxygen atoms is 80 cm^3, which is spread 1.2 RJ in thenorth-south direction.
 The estimated source rate of oxygen ions is 410 kg/s, which is consistent with previous studies.
Kotov, D. V., P. G. Richards, V. Truhlík, O. V. Bogomaz, M. O. Shulha, N. Maruyama, M.
Hairston, Y. Miyoshi, Y. Kasahara, A. Kumamoto, F. Tsuchiya, A. Matsuoka, I. Shinohara, M.

資料6-H

Hernández‐Pajares, I. F. Domnin, T. G. Zhivolup, L. Ya. Emelyanov, and Ya. M. Chepurnyy,
Coincident Observations by the Kharkiv IS Radar and Ionosonde, DMSP and Arase (ERG)
Satellites, and FLIP Model Simulations: Implications for the NRLMSISE-00 Hydrogen Density,
Plasmasphere, and Ionosphere, Geophys. Res. Lett., 45, https://doi.org/10.1029/2018GL079206,
2018.
 This paper reports the results of ionosphere and plasmasphere observations with the Kharkiv
incoherent scatter radar and ionosonde, Defense Meteorological Satellite Program, and Arasesatellites and simulations with field line interhemispheric plasma model during the equinoxes andsolstices of solar minimum 24.
Kuramitsu, Y., T. Moritaka, Y. Sakawa, T. Morita, T. Sano, M. Koenig, C. D. Gregory, N.
Woolsey, K. Tomita, H. Takabe, Y. L. Liu, S. H. Chen, S. Matsukiyo, and M. Hoshino, Magnetic
reconnection driven by electron dynamics, Nature Comm., 9, 5109, 2018.
 Experimental results on an electron scale magnetic reconnection driven by the electron dynamics
in laser-produced plasmas are shown.
Kurita, S., Y. Miyoshi, S. Kasahara, S. Yokota, Y. Kasahara, S. Matsuda, A. Kumamoto, A.
Matsuoka, and I. Shinohara, Deformation of electron pitch angle distributions caused by upperband chorus observed by the Arase satellite, Geophys. Res. Lett., 45,
https://doi.org/10.1029/2018GL079104, 2018.
 Deformation of electron pitch angle distributions associated with upper band chorus was reported.
 Tens of keV electrons were rapidly accelerated by upper-band chorus waves within 30 seconds,
which suggests the deformation was a consequence of wave-particle interactions between
electrons and upper-band chorus.
Kurita, S., Y. Miyoshi, K. Shiokawa, N. Higashio, T. Mitani, T. Takashima, A. Matsuoka, I.
Shinohara, C. A. Kletzing , J. B. Blake, S. G. Claudepierre, M. Connors, S. Oyama, T. Nagatsuma,
K. Sakaguchi, D. Baishev and Y. Otsuka, Rapid loss of relativistic electrons by EMIC waves in
the outer radiation belt observed by Arase, Van Allen Probes, and the PWING ground stations,Geophys. Res. Lett., 45, doi:10.1029/2018GL080262, 2018.
 This paper reports rapid loss of relativistic electrons by EMIC waves in the outer radiation belt
observed by Arase, Van Allen Probes, and the PWING ground stations during the geomagnetic
storm on March 21, 2017 associated with an arrival of CIR in the solar wind.
Matsuda, S., Y. Kasahara, Y. Miyoshi, R. Nomura, M. Shoji, A. Matsuoka, Y. Kasaba, S. Kurita,
M. Teramoto, K. Ishisaka, Spatial Distribution of Fine-Structured and Unstructured EMIC
Waves
Observed
by
the
Arase
Satellite,
Geophys.
Res.
Lett.,
45,
https://doi.org/10.1029/2018GL080109, 2018.
 We surveyed 378 electromagnetic ion cyclotron (EMIC) wave events during the first year
observation period of the Arase, and demonstrated that two types of EMIC waves (fine-structured
and unstructured) have different spatial distribution.
 Fine-structured EMIC were mainly distributed in the off-equatorial region around the noon sector,
which is a new finding due to the unique orbital condition of Arase.
Mitani, K., K. Seki, K. Keika, M. Gkioulidou, L. J. Lanzerotti, D. G. Mitchell, C. A. Kletzing, A.
Yoshikawa, and Y. Obana, Statistical study of selective Oxygen increase in high-energy ring
current ions during magnetic storms, J. Geophys. Res. - Space Physics., doi:
10.1029/2018JA026168, 2019.
 This is a statistical study of Selective Oxygen Increase (SOI) in high-energy ring current ions
during magnetic storms using RBSPICE data from the Van Allen Probes mission. From the phasespace densities of protons and oxygen ions they found 30 SOI events out of 90 magnetic storms.
Observation results of Pc 4-5 ULF waves from ground-based magnetometers agreed with thescenario of the radial transport of oxygen ions due to a combination of drift and drift-bounce
resonances with Pc 4-5 waves.

資料6-H

Nosé, M., A. Matsuoka, S. Kasahara, S. Yokota, M. Teramoto, K. Keika, K. Yamamoto, R.
Nomura, A. Fujimoto, N. Higashio, H. Koshiishi, S. Imajo, S. Oimatsu, Y.�M. Tanaka, M.
Shinohara, I. Shinohara, and Y. Miyoshi, Magnetic field dipolarization and its associated ion
flux variations in the dawnside deep inner magnetosphere: Arase observations, GeophysicalResearch Letters, 45, doi:10.1029/2018GL078825, 2018.
 The Arase satellite observed clear dipolarization signatures at r~4.3–4.6 RE, GMLAT~16-18 deg,and MLT~5.5–5.7 hr around 15:00 UT on 27 March 2017 when Dst~−70 nT. Strong magnetic
field fluctuations were embedded and their characteristic frequency was close to the local
gyrofrequency of O+ ions.
Nosé, M., A. Matsuoka, A. Kumamoto, Y. Kasahara, J. Goldstein, M. Teramoto, F. Tsuchiya, S.
Matsuda, M. Shoji, S. Imajo, S. Oimatsu, K. Yamamoto, Y. Obana, R. Nomura, A. Fujimoto, I.
Shinohara, Y. Miyoshi, W. S. Kurth, C. A. Kletzing, C. W. Smith, and R. J. MacDowall,
Longitudinal structure of oxygen torus in the inner magnetosphere: Simultaneous observations
by Arase and Van Allen Probe A, Geophysical Research Letters, 45, doi:10.1029/2018GL080122,
2018.
 Simultaneous observations of the magnetic field and plasma waves made by the Arase and Van
Allen Probe A satellites at different magnetic local time (MLT) enable us to deduce thelongitudinal structure of an oxygen torus for the first time. For this event, the O+ density
enhancement in the inner magnetosphere (i.e., oxygen torus) does not extend over all MLT but isskewed toward the dawn, being described more precisely as a crescent-shaped torus or a pinchedtorus.
Ohya, H., F. Tsuchiya, Y. Takishita, H. Shinagawa, K. Nozaki, and K. Shiokawa, Periodic
Oscillations in the D-region Ionosphere after the 2011 Tohoku Earthquake using LF Standard
Radio Waves, J. Geophys. Res., 123, doi: 10.0002/2018JA025289, 2018.
 This paper reports periodic oscillations in the D-region ionosphere after the 2011 Tohoku
Earthquake using LF standard radio waves passing over Japan.
Otsuka, F., S. Matsukiyo, A. Kis, K. Nakanishi, and T. Hada, Effect of upstream ULF waves on
the energetic ion diffusion at the earth's foreshock, I: Theory and simulation, Astrophys. J., doi:
10.3847/1538-4357/aaa23f, 853, 117(11pp), 2018.
 Efficiency of spatial diffusion influenced by ULF waves generated by field aligned ion beamobserved upstream of the earth's bow shock is studied theoretically and the result is comparedwith the observation by cluster satellites.
Ozaki, M., K. Shiokawa, Y. Miyoshi, K. Hosokawa, S. Oyama, S. Yagitani, Y. Kasahara, Y.
Kasaba, S. Matsuda, R. Kataoka, Y. Ebihara, Y. Ogawa, Y. Otsuka, S. Kurita, R. C. Moore, Y.M. Tanaka, M. Nosé, T. Nagatsuma, M. Connors, N. Nishitani, Y. Katoh, M. Hikishima, A.
Kumamoto, F. Tsuchiya, A. Kadokura, T. Nishiyama, T. Inoue, K. Imamura, A. Matsuoka, andI. Shinohara, Microscopic observations of pulsating aurora associated with chorus element
structures: Coordinated Arase satellite-PWING observations. Geophysical Research Letters, 45,
12,125– 12,134, https://doi.org/10.1029/2018GL079812, 2018.
 This paper reports microscopic observations of pulsating aurora associated with chorus element
structures with a timescale less than 1 second using coordinated Arase satellite-PWING
observations.
Ozaki, M., Y. Miyoshi, K. Shiokawa, K. Hosokawa, S. Oyama, R. Kataoka, Y. Ebihara, Y. Ogawa,Y. Kasahara, S. Yagitani, Y. Kasaba, A. Kumamoto, F. Tsuchiya, S. Matsuda, Y. Katoh, M.
Hikishima, S. Kurita, Y. Otsuka, R. C. Moore, Y. Tanaka, M. Nosé, T. Nagatsuma, N. Nishitani,
A. Kadokura, M. Connors, T. Inoue, A. Matsuoka, and I. Shinohara, Visualization of rapid
electron precipitation via chorus element wave–particle interactions, Nature Communications,10(257), 2019.

資料6-HThis paper reports a visualization of chorus element wave–particle interactions in the Earth’s
magnetosphere by in-situ measurements of chorus waveforms with the Arase satellite andtransient auroral flashes from electron precipitation events observed by a ground-based EMCCD
camera of the PWING project..

Shinbori, A., Y. Otsuka, T. Tsugawa, M. Nishioka, A. Kumamoto, F. Tsuchiya, S. Matsuda, Y.
Kasahara, A. Matsuoka, J. M. Ruohoniemi, S. G. Shepherd, and N. Nishitani, Temporal andspatial variations of storm time midlatitude ionospheric trough basedon global GNSS‐TEC
and Arase satellite observations, Geophys. Res. Lett., 45, https://doi.org/10.1029/2018GL078723,
2018.
 Temporal and spatial variations of the mid-latitude ionospheric trough during a geomagnetic
storm on 4 April 2017 have been investigated using Global Navigation Satellite System (GNSS)
total electron content (TEC) data together with Arase observation.
Shoji, M., Yoshizumi Miyoshi, Yoshiharu Omura, Lynn M. Kistler, Yasumasa Kasaba, Shoya
Matsuda, Yoshiya Kasahara, Ayako Matsuoka, Reiko Nomura, Keigo Ishisaka, Atsushi
Kumamoto, Fuminori Tsuchiya, Satoshi Yagitani, Mariko Teramoto, Kazushi Asamura, Takeshi
Takashima, Iku Shinohara, Instantaneous frequency analysis on nonlinear EMIC emissions:
Arase observation, Geophys. Res. Lett., https://doi.org/10.1029/2018GL079765, 2018.
 EMIC waves with rising and falling frequencies were observed by the Arase.
 Instantaneous frequency of the rising tone EMIC wave was studied and the time variation of theinstantaneous frequency shows a good agreement with the nonlinear theory for the frequency
evolutions.
Takahashi, K., R. E. Denton, T. Motoba, A. Matsuoka, Y. Kasaba, Y. Kasahara, M. Teramoto,
M. Shoji, N. Takahashi, Y. Miyoshi, M. Nosé, A. Kumamoto, F. Tsuchiya, R. J. Redmon, and J.
V. Rodriguez, Impulsively excited nightside ultralow frequency waves simultaneously observedon and off the magnetic equator, Geophys. Res. Lett., 45, https://doi.org/10.1029/2018GL078731,
2018.
 A series of impulsively excited fundamental toroidal mode standing Alfvén waves in the midnight
sector was observed by Arase outside the plasmasphere at magnetic latitudes 13–24°.
 The wave onsets are concurrent with Pi2 onsets detected by the Van Allen Probe B spacecraft at
the magnetic equator in the duskside plasmasphere and by ground magnetometers at low latitudes.
 This multipoint observation indicates that different wave modes are excited from a common
impulsive source located in the near‐Earth magnetotail.
Tao, C., T. Kimura, F. Tsuchiya, G. Murakami, K. Yoshioka, A. Yamazaki, S. V. Badman, H.
Misawa, H. Kita, Y. Kasaba, I. Yoshikawa, and M. Fujimoto, Variation of Jupiter's aurora
observed by Hisaki/EXCEED: 3. Volcanic control of Jupiter's aurora, Geophys. Res. Lett., 45,
71-79, doi:10.1002/2017GL075814, 2018.
 Responses of Jupiter’s northern aurora spectra to Io volcanic activity were detected using
Hisaki/EXCEED long-term monitoring.
 Decrease of color ratio, that is, auroral electron energy, suggests reduced electron acceleration
for the more highly populated magnetosphere.
 Long-term observation provided the typical value and variances of auroral emission power andelectron parameters.
Thomas, N., K. Shiokawa, and G. Vichare, Comprehensive study of low-latitude Pi2 pulsations
using observations from multi-satellite Swarm mission and global network of groundobservatories, J. Geophys. Res., 124, doi: 10.1029/2018JA026094, 2019.
 This paper reports comprehensive study of low-latitude Pi2 pulsations using observations frommulti-satellite Swarm mission and global network of ground observatories.
Tsuchiya, F., A. Hirai, T. Obara, H. Misawa, S. Kurita, Y. Miyoshi, K. Shiokawa, M. Connors,

資料6-HM. Ozaki, Y. Kasahara, A. Kumamoto, Y. Kasaba, A. Matsuoka, M. Shoji, and I. Shinohara,
Energetic electron precipitation associated with pulsating aurora observed by VLF radio
propagation during the recovery phase of a substorm on 27 March 2017. Geophysical Research
Letters, 45. https://doi.org/10.1029/2018GL080222, 2018.
 Energetic electron precipitation was observed with subionospheric VLF propagation during asubstorm on 27 March 2017.
 Similar time variations between the pulsating aurora and energetic electron precipitation were
found.
 The short recovery time of the subionospheric perturbation indicates that pulsating aurora
accompanied relativistic electron precipitation.
Tsuchiya, F., K. Yoshioka, T. Kimura, R. Koga, G. Murakami, A. Yamazaki, M. Kagitani, C. Tao,
F. Suzuki, R. Hikida, I. Yoshikawa, Y. Kasaba, H. Kita, H. Misawa, and T. Sakanoi,
Enhancement of the Jovian Magnetospheric Plasma Circulation Caused by the Change in
Plasma Supply from the Satellite Io, J. Geophys. Res: Space Phys., 123,
doi:10.1029/2018JA025316, 2018.
 Evolution of Io plasma torus radial distribution caused by volcanic eruptions in Io was observedin early 2015.
 Outward plasma transport from the Io plasma torus through 8 RJ from Jupiter enhanced forapproximately 2 months.
 An inner magnetosphere plasma source is shown to affect large-scale mass/energy radial
circulation in rotationally dominant magnetosphere.
Tsuchiya, F., H. Misawa, H. Kita, A. Morioka, and T. Kondo, Two-element radio interferometerfor the observation of Jupiter's synchrotron radiation, Proc. International Sympo. Planetary
Science 2011, ed. S. Okano, Y. Kasaba, H. Misawa, pp.47-58. TERRAPUB, Tokyo,
doi:10.5047/pisps.047, 2019.
 This paper suggests that the two-element interferometer with the baseline length of about 3 km
along the east-west direction is feasible to detect the difference of JSR emission distribution due
to (1) fast radial transport and acceleration of energetic electrons in the equatorial region of theinner magnetosphere and (2) significant enhancement of energetic electrons outside the innermagnetosphere and their injection into the polar region.
Umeda, T., R. Yamazaki, Y. Ohira, N. Ishizaka, S. Kakuchi, Y. Kuramitsu, S. Matsukiyo, I.
Miyata, T. Morita, Y. Sakawa, T. Sano, S. Sei, S. J. Tanaka, H. Toda, and S. Tomita, Full particlein-cell simulation of the interaction between two plasmas for laboratory experiments on thegeneration of magnetized collisionless shocks with high-power lasers, Phys. Plasmas, 26, 032303,
doi:10.1063/1.5079906, 2019.
 A preliminary numerical experiment is conducted for laboratory experiments on the generationof magnetized collisionless shocks with high-power lasers by using one-dimensional particle-incell simulation.
Zushi, T., H. Kojima, Y. Kasahara, and T. Hamano, Development of a miniaturized spectrumtype plasma wave receiver comprising an application-specific integrated circuit analog front end
and a field-programmable gate array, Meas. Sci. Technol., 30, doi: 10.1088/1361-6501/ab0821,
2019.
 A miniaturized spectrum-type plasma wave receiver was developed comprising an applicationspecific integrated circuits (ASIC) and a field-programmable gate array (FPGA).
 The spectrum receiver was successfully implemented and showed sufficient performance forplasma wave observation.