Zobrazeno 1 - 10
of 80
pro vyhledávání: '"Takahiro Obara"'
Publikováno v:
Earth, Planets and Space, Vol 73, Iss 1, Pp 1-10 (2021)
Abstract In gradual Solar Energetic Particle (SEP) events, shock waves driven by coronal mass ejections (CMEs) play a major role in accelerating particles, and the energetic particle flux enhances substantially when the shock front passes by the obse
Externí odkaz:
https://doaj.org/article/2fa7de86223c47d9807b03ec58e25e2c
Autor:
Atsushi Kumamoto, Fuminori Tsuchiya, Yoshiya Kasahara, Yasumasa Kasaba, Hirotsugu Kojima, Satoshi Yagitani, Keigo Ishisaka, Tomohiko Imachi, Mitsunori Ozaki, Shoya Matsuda, Masafumi Shoji, Aayako Matsuoka, Yuto Katoh, Yoshizumi Miyoshi, Takahiro Obara
Publikováno v:
Earth, Planets and Space, Vol 70, Iss 1, Pp 1-14 (2018)
Abstract The High Frequency Analyzer (HFA) is a subsystem of the Plasma Wave Experiment onboard the Arase (ERG) spacecraft. The main purposes of the HFA include (1) determining the electron number density around the spacecraft from observations of up
Externí odkaz:
https://doaj.org/article/ef4db5d6606d40b3b5b7254fbc4f7807
Autor:
Takahiro Obara, Toshifumi Mukai, Hajime Hayakawa, Koichiro Tsuruda, Ayako Matsuoka, Atsuhiro Nishida
Publikováno v:
Antarctic Record, Vol 38, Iss 2, Pp 148-156 (1994)
Akebono (EXOS-D) observations revealed that an electric field in the polar cap region was very irregular and an entire polar cap region was filled with many electron precipitation spikes when the interplanetary magnetic field (IMF) was directed north
Externí odkaz:
https://doaj.org/article/13a4bf35a90942a89583914c9cfe2c14
Autor:
Ryuho Kataoka, Yusuke Ebihara, Takahiro Obara, Masakazu Watanabe, Shuji Fujita, Takashi Tanaka, Mitsue Den
Publikováno v:
Journal of Geophysical Research: Space Physics. 124:6812-6832
Publikováno v:
Earth, Planets, and Space
Earth, Planets and Space, Vol 73, Iss 1, Pp 1-10 (2021)
Earth, Planets and Space, Vol 73, Iss 1, Pp 1-10 (2021)
In gradual Solar Energetic Particle (SEP) events, shock waves driven by coronal mass ejections (CMEs) play a major role in accelerating particles, and the energetic particle flux enhances substantially when the shock front passes by the observer. Suc
Formation of the Sun-aligned arc region and the void (polar slot) under the null-separator structure
Autor:
Takahiro Obara, Shigeru Fujita, Yusuke Ebihara, Takashi Tanaka, Ryuho Kataoka, Masakazu Watanabe
Publikováno v:
Journal of Geophysical Research: Space Physics. 122:4102-4116
From the global magnetosphere-ionosphere (M-I) coupling simulation, we examined the formation of the sun-aligned arc region and the void (polar slot) under the northward interplanetary magnetic field (IMF) with negative By condition. In the magnetosp
Autor:
Satoshi Masuda, Kiyokazu Koga, T. Yamamoto, Luis Xavier Gonzalez, P. Miranda, Shoichi Shibata, Tateo Goka, Takahiro Obara, R. Ticona, Yutaka Matsubara, T. K. Sako, Osamu Okudaira, Hironori Matsumoto, J. Salinas, Kyoko Watanabe, Yasushi Muraki, D. Lopez, Fumio Kakimoto, J. F. Valdés-Galicia, Yoshiki Tsunesada
Publikováno v:
Solar Physics. 291:1241-1265
An M6.5-class flare was observed at N12E56 on the solar surface at 16:06 UT on July 8, 2014. In association with the flare, two neutron detectors located at high mountains, Mt. Sierra Negra in Mexico and Mt. Chacaltaya in Bolivia, recorded two neutro
Autor:
Akira Shirasawa, Hiroko Kajita, Kaori Iwabuchi, Yutaka Sasaki, Masaki Takahashi, Shun Ichi Maisawa, Yoko Matsuzaki, Takahiro Obara, Tomoko Takahashi, Hirokazu Kimura, Akihide Ryo, Naoto Yoshino, Yasushi Ono, Yasushi Muraki
Publikováno v:
Japanese journal of infectious diseases. 71(5)
Autor:
Yuto Katoh, Mitsunori Ozaki, Yasumasa Kasaba, Hirotsugu Kojima, Aayako Matsuoka, Masafumi Shoji, Tomohiko Imachi, Yoshiya Kasahara, Fuminori Tsuchiya, Keigo Ishisaka, Satoshi Yagitani, Shoya Matsuda, Atsushi Kumamoto, Takahiro Obara, Yoshizumi Miyoshi
Publikováno v:
Earth, Planets and Space, Vol 70, Iss 1, Pp 1-14 (2018)
著者人数: 15名
Accepted: 2018-04-25
資料番号: SA1180017000
Accepted: 2018-04-25
資料番号: SA1180017000
Autor:
Kazutaka Kaneda, Fuminori Tsuchiya, Yuto Katoh, Kazumasa Iwai, S. Matsumoto, Hiroaki Misawa, M. Yagi, Takahiro Obara, Baptiste Cecconi, Atsushi Kumamoto
Publikováno v:
PLANETARY RADIO EMISSIONS VIII.
Observations of solar radio bursts is a useful tool to study non-thermal electron acceleration and the plasma environment in the solar corona. The radio bursts in a frequency range from 150 to 500 MHz with fine temporal and spectral resolutions (10 m