研究者詳細 - 大塚　雄一

論文 - 大塚　雄一

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Statistical study of relationship between medium-scale traveling ionospheric disturbance and sporadic E layer activities in summer night over Japan 査読有り

Otsuka Y., Tani T., Tsugawa T., Ogawa T., Saito A.

JOURNAL OF ATMOSPHERIC AND SOLAR-TERRESTRIAL PHYSICS 70 巻 ( 17 ) 頁： 2196 - 2202 2008年12月

Decay of 3-m-scale ionospheric irregularities associated with a plasma bubble observed with the Equatorial Atmosphere Radar 査読有り

Saito, S; Fukao, S; Yamamoto, M; Otsuka, Y; Maruyama, T

JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS 113 巻 ( A11 ) 2008年11月

F-3 layer during penetration electric field 査読有り

Balan N., Thampi S. V., Lynn K., Otsuka Y., Alleyne H., Watanabe S., Abdu M. A., Fejer B. G.

JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS 113 巻 2008年9月

Simultaneous appearance of isolated auroral arcs and Pc 1 geomagnetic pulsations at subauroral latitudes 査読有り

Sakaguchi, K; Shiokawa, K; Miyoshi, Y; Otsuka, Y; Ogawa, T; Asamura, K; Connors, M

JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS 113 巻 ( A5 ) 2008年5月

Daytime 150-km echoes observed with the Equatorial Atmosphere Radar in Indonesia: First results 査読有り

Patra, AK; Yokoyama, T; Otsuka, Y; Yamamoto, M

GEOPHYSICAL RESEARCH LETTERS 35 巻 ( 6 ) 2008年3月

First three-dimensional simulation of the Perkins instability in the nighttime midlatitude ionosphere 査読有り

Yokoyama, T; Otsuka, Y; Ogawa, T; Yamamoto, M; Hysell, DL

GEOPHYSICAL RESEARCH LETTERS 35 巻 ( 3 ) 2008年2月

Optical and Radio Observations and AMIE/TIEGCM Modeling of Nighttime Traveling Ionospheric Disturbances at Midlatitudes During Geomagnetic Storms

Shiokawa, K; Tsugawa, T; Otsuka, Y; Ogawa, T; Lu, G; Saito, A; Yamamoto, M

MIDLATITUDE IONOSPHERIC DYNAMICS AND DISTURBANCES 181 巻頁： 271 - 281 2008年

© 2008 by the American Geophysical Union. This paper summarizes our recent observations of storm-time traveling ionospheric disturbances (TIDs) over Japan. The storm-time TIDs, which are often referred as large-scale TIDs or traveling atmospheric disturbances, are generated at high-latitude auroral zone and propagate predominantly equatorward at midlatitudes as atmospheric waves in the thermosphere. The imaging measurements by airglow imagers and GPS networks give reliable wave parameters (wavelength, phase velocity, and amplitude) of TIDs. Comparison of imaging observations of TIDs between the northern and southern hemispheres revealed their nonconjugacy. Combinations of these imaging observations with vertical sounding measurements by ionosondes and radars provide a comprehensive description of TID structures at midlatitudes. Comparison between these observations and the assimilative mapping of the ionospheric electrodynamics technique with the thermosphere-ionosphere electrodynamics general circulation model results in several insights into the generation and propagation of TIDs at the high-latitude source region as well as limitations of the current global model.

DOI： 10.1029/181GM24

Web of Science

Scopus

Discovery of anoumoulous stripes over the amazon by the PALSAR onboard ALOS satellite 査読有り

Masanobu Shimada, Yasushi Muraki, Yuichi Otsuka

International Geoscience and Remote Sensing Symposium (IGARSS) 2 巻 ( 1 ) 頁： II387 - II390 2008年

記述言語：英語掲載種別：研究論文（国際会議プロシーディングス）

We discovered anomalous stripes over the large area of Amazon when the region was scanned by the radar (PALSAR) onboard ALOS satellite. The stripes appeared on the local midnight along the geomagnetic field line with a typical characteristic width of 600m. ©2008 IEEE.

DOI： 10.1109/IGARSS.2008.4779009

Scopus

Medium-scale traveling ionospheric disturbances detected with dense and wide TEC maps over North America 査読有り

Tsugawa, T; Otsuka, Y; Coster, AJ; Saito, A

GEOPHYSICAL RESEARCH LETTERS 34 巻 ( 22 ) 2007年11月

Summer-winter hemispheric asymmetry of the sudden increase in ionospheric total electron content and of the O/N-2 ratio: Solar activity dependence 査読有り

Tsugawa T., Zhang S.-R., Coster A. J., Otsuka Y., Sato J., Saito A., Zhang Y., Paxton L. J.

JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS 112 巻 ( A8 ) 2007年8月

Low-latitude total electron content enhancement at low geomagnetic activity observed over Japan 査読有り

Kutiev, I; Otsuka, Y; Saito, A; Tsugawa, T

JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS 112 巻 ( A7 ) 2007年7月

Simultaneous observations of nighttime medium-scale traveling ionospheric disturbances and E region field-aligned irregularities at midlatitude 査読有り

Otsuka Y., Onoma F., Shiokawa K., Ogawa T., Yamamoto M., Fukao S.

JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS 112 巻 ( A6 ) 2007年6月

Ground observation and AMIE-TIEGCM modeling of a storm-time traveling ionospheric disturbance 査読有り

Shiokawa, K; Lu, G; Otsuka, Y; Ogawa, T; Yamamoto, M; Nishitani, N; Sato, N

JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS 112 巻 ( A5 ) 2007年5月

Simultaneous ground and satellite observations of an isolated proton arc at subauroral latitudes 査読有り

Sakaguchi, K; Shiokawa, K; Ieda, A; Miyoshi, Y; Otsuka, Y; Ogawa, T; Connors, M; Donovan, EF; Rich, FJ

JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS 112 巻 ( A4 ) 2007年4月

An intense gravity wave near the mesopause region observed by a Fabry-Perot interferometer and an airglow imager 査読有り

Shiokawa K., Suzuki S., Otsuka Y., Ogawa T., Nakamura T., Horinouchi T.

JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 112 巻 ( D7 ) 2007年4月

Medium-scale traveling ionospheric disturbances observed by GPS receiver network in Japan: a short review 査読有り

Tsugawa, T; Kotake, N; Otsuka, Y; Saito, A

GPS SOLUTIONS 11 巻 ( 2 ) 頁： 139 - 144 2007年3月

A concentric gravity wave structure in the mesospheric airglow images 査読有り

Suzuki S., Shiokawa K., Otsuka Y., Ogawa T., Nakamura K., Nakamura T.

JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 112 巻 ( D2 ) 2007年1月

Simultaneous observations of nighttime medium-scale traveling ionospheric disturbances and E-region field-aligned irregularities at midlatitude 査読有り

Otsuka, Y., F. Onoma, K. Shiokawa, T. Ogawa, M. Yamamoto, and S. Fukao

J. Geophys. Res 頁： doi:10.1029/2005JA011548 2007年

Statistical study of medium-scale traveling ionospheric disturbances observed with the GPS networks in Southern California 査読有り

Kotake, N; Otsuka, Y; Ogawa, T; Tsugawa, T; Saito, A

EARTH PLANETS AND SPACE 59 巻 ( 2 ) 頁： 95 - 102 2007年

The ionospheric response in the Brazilian sector during the super geomagnetic storm on 20 November 2003 査読有り

Becker-Guedes, F; Sahai, Y; Fagundes, PR; Espinoza, ES; Pillat, VG; Lima, WLC; Basu, S; Basu, S; Otsuka, Y; Shiokawa, K; MacKenzie, EM; Pi, X; Bittencourt, JA

ANNALES GEOPHYSICAE 25 巻 ( 4 ) 頁： 863 - 873 2007年

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