Výsledky vyhledávání - "Ogawa, Y. (Yasunobu)"

Thermospheric wind response to a sudden ionospheric variation in the trough:event at a pseudo-breakup during geomagnetically quiet conditions

Autor: Oyama, S.-i. (Shin-ichiro), Vanhamäki, H. (Heikki), Cai, L. (Lei), Aikio, A. (Anita), Rietveld, M. (Michael), Ogawa, Y. (Yasunobu), Raita, T. (Tero), Kellinsalmi, M. (Mirjam), Kauristie, K. (Kirsti), Kozelov, B. (Boris), Shinbori, A. (Atsuki), Shiokawa, K. (Kazuo), Tsuda, T. T. (Takuo T.), Sakanoi, T. (Takeshi)

The thermospheric wind response to a sudden westward turning of the ion velocity at a high latitude was studied by analyzing data obtained with a Fabry–Perot interferometer (FPI; 630 nm), Dynasonde, and Swarm A & C satellites during a conjunction e

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=od______2423::e8b781752e1d48107c7347321a780c5c
http://urn.fi/urn:nbn:fi-fe2023061254088

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Precipitating electron energy spectra and auroral power estimation by incoherent scatter radar with high temporal resolution

Autor: Tesfaw, H. W. (Habtamu W.), Virtanen, I. I. (Ilkka I.), Aikio, A. T. (Anita T.), Nel, A. (Amoré), Kosch, M. (Michael), Ogawa, Y. (Yasunobu)

This study presents an improved method to estimate differential energy flux, auroral power and field-aligned current of electron precipitation from incoherent scatter radar data. The method is based on a newly developed data analysis technique that u

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=od______2423::6c43bdfa2f7c55d2f6b902cadf6576e5
http://urn.fi/urn:nbn:fi-fe2022121972544

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Slow contraction of flash aurora induced by an isolated chorus element ranging from lower-band to upper-band frequencies in the source region

Autor: Ozaki, M. (Mitsunori), Yagitani, S. (Satoshi), Shiokawa, K. (Kazuo), Tanaka, Y. (Yoshimasa), Ogawa, Y. (Yasunobu), Hosokawa, K. (Keisuke), Kasahara, Y. (Yoshiya), Ebihara, Y. (Yusuke), Miyoshi, Y. (Yoshizumi), Imamura, K. (Kousuke), Kataoka, R. (Ryuho), Oyama, S.-I. (Shin-Ichiro), Chida, T. (Teppei), Kadokura, A. (Akira)

Flash aurora driven by an isolated chorus element can be a useful ionospheric indicator for identifying the source wave properties via wave-particle interactions. Using ground observation and modeling approaches, here we report the temporal character

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=od______2423::6db85b21daccee0fd620964365c0bd86
http://www.iugonet.org/

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Variations in cosmic noise absorption in association with equatorward development of the pulsating auroral patch:a case study to estimate the energy spectra of auroral precipitating electrons

Autor: Miyamoto, T. (Taishiro), Oyama, S.-i. (Shin-ichiro), Raita, T. (Tero), Hosokawa, K. (Keisuke), Miyoshi, Y. (Yoshizumi), Ogawa, Y. (Yasunobu), Kurita, S. (Satoshi)

This study focused on a pulsating aurora event associated with aurora morphological changes in Fennoscandia in the early morning on March 7, 2017. A high-speed sampling all-sky camera captured equatorward development of the pulsating auroral patch in

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=od______2423::1b593cfc21291e70cfbaed671ec71877
http://wdc.kugi.kyoto-u.ac.jp/

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Polarization electric field inside auroral patches:simultaneous experiment of EISCAT radars and KAIRA

Autor: Takahashi, T. (Toru), Virtanen, I. I. (Ilkka I.), Hosokawa, K. (Keisuke), Ogawa, Y. (Yasunobu), Aikio, A. (Anita), Miyaoka, H. (Hiroshi), Kero, A. (Antti)

The primary focus of this study was the motion of auroral patches and the polarization electric field generated therein observed on 9 November 2015 in an experiment using the European incoherent scatter (EISCAT) radars, Kilpisjärvi Atmospheric Imagi

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=od______2423::8970666e4327c530b56d220b3778c29d
http://urn.fi/urn:nbn:fi-fe2019092329509

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