Akira Sessai Yukimatu

J-GLOBAL         Last updated: Sep 4, 2019 at 01:50
 
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Name
Akira Sessai Yukimatu
URL
http://www.nipr.ac.jp/
Affiliation
National Institute of Polar Research
Section
Space and Upper Atmospheric Sciences Research Group
Job title
Assoc. Prof.
Degree
Doctor of Science(Kyoto Univ.), Master of Science(Kyoto University)
Other affiliation
The Graduate University for Advanced Studies [SOKENDAI]

Research Areas

 
 

Academic & Professional Experience

 
Aug 1988
 - 
Mar 1990
wintering member, upper atmosphere physics, The 30th Japanese Antarctic Research Expedition
 
Oct 1992
 - 
Mar 2004
Research Associate, Division of Research, National Institute of Polar Research
 
Apr 1993
 - 
Mar 2004
Research Associate, Department of Polar Science, The Graduate University for Advanced Studies (SOKENDAI)
 
Apr 2004
 - 
Mar 2007
Research Associate, Division for Research and Education, Research Organization of Information and Systems (ROIS) / National Institute of Polar Research (NIPR)
 
Apr 2004
 - 
Mar 2007
Research Associate, Department of Polar Science, School of Multidisciplinary Sciences, The Graduate University for Advanced Studies (SOKENDAI)
 
Jul 2004
 - 
Mar 2006
wintering member, upper atmosphere physics, The 46th Japanese Antarctic Research Expedition
 
Apr 2007
 - 
Nov 2008
Research Associate, Division for Research and Education, Research Organization of Information and Systems (ROIS) / National Institute of Polar Research (NIPR)
 
Apr 2007
 - 
Dec 2008
Research Associate, Department of Polar Science, School of Multidisciplinary Sciences, The Graduate University for Advanced Studies (SOKENDAI)
 
Dec 2008
 - 
Today
Assoc. Prof., Division for Research and Education, Research Organization of Information and Systems (ROIS) / National Institute of Polar Research (NIPR)
 
Jan 2009
 - 
Today
Assoc. Prof., Department of Polar Science, School of Multidisciplinary Sciences, The Graduate University for Advanced Studies (SOKENDAI)
 
Jul 2016
 - 
Mar 2017
Summer party member, Upper Atmosphere Physics, The 58th Japanese Antarctic Research Expedition
 

Education

 
Apr 1988
 - 
Sep 1992
Department of Geophysics, Graduate School, Division of Natural Science, Kyoto University
 
Apr 1984
 - 
Mar 1988
Faculty of Science, Kyoto University
 

Committee Memberships

 
Apr 2019
 - 
Today
SGEPSS  steering committee member
 
Apr 2012
 - 
Today
SuperDARN  SENSU Syowa radars Principal Investigator & Executive Council member
 
Feb 2009
 - 
Today
Associate Editor for Polar Science
 

Published Papers

 
Direct comparison between magnetospheric plasma waves and polar mesosphere winter echoes in both hemispheres
Tanaka, Y.-M., T. Nishiyama, A. Kadokura, M. Ozaki, K. Shiokawa, S. Oyama, M. Nosé, T. Nagatsuma, M. Tsutsumi1,, K. Nishimura, K. Sato, Y. Miyoshi, Y. Kasahara, A. Kumamoto, F. Tsuchiya, M. Hikishima, S. Matsuda, A. Matsuoka, M. Shinohara, A. Fujimoto, M. Teramoto, R. Nomura, R. Kataoka, and A. Sessai Yukimatu
J. Geophys. Res. (SPA)      Sep 2019   [Refereed]
(accepted to JGR on 2019/09/02)
Bland, Emma C., Noora Partamies, Erkka Heino, Akira Sessai Yukimatu, Hiroshi Miyaoka
J. Geophys. Res. Space Physics   124    Jul 2019   [Refereed]
We demonstrate that the Super Dual Auroral Radar Network (SuperDARN) radar at Syowa station, Antarctica, can be used to detect high frequency radio wave attenuation in the D region ionosphere during energetic electron precipitation (EEP) events. E...
Berngardt, O. I., J. M. Ruohoniemi, J.-P. St-Maurice, A. Marchaudon, M. J. Kosch, A. S. Yukimatu, N. Nishitani, S. G. Shepherd, M. F. Marcucci, H. Hu, T. Nagatsuma, M. Lester
Space Weather   17(6)    May 2019   [Refereed]
An analysis of noise attenuation during 80 solar flares between 2013 and 2017 was carried out at frequencies 8–20 MHz using 34 Super Dual Auroral Radar Network radars and the EKB ISTP SB RAS radar. The attenuation was determined on the basis of no...
Sato, N., A. S. Yukimatu, Y,. Tanaka, and T. Hori
Earth, Planets and Space   69(103) 1-11   Aug 2017   [Refereed]
We examined the morphological signatures of 315 omega band aurora events observed using the Time History of Events and Macroscale Interactions during Substorm ground-based all-sky imager network over a period of 8 years. We find that omega bands c...
Kawano, H., A. S. Yukimatu, Y. Tanaka, S. Saita, N. Nishitani, and T. Hori
Memoirs of the Faculty of Science, Kyushu University, Series D, Earth and Planetary Sciences   XXXIV(1) 1-15   Nov 2016   [Refereed]
In this paper we present a new kind of wave event found in the ground/sea backscattered data of the SuperDARN Hokkaido East radar, located in the mid-latitude area at the AACGM latitude (longitude) of 36.5° (214.7°). The wave event started at the ...
Nishitani, N., T. Nagatsuma, A. S. Yukimatu, Hongqiao Hu, and T. Sakanoi
Earth, Planets and Space   68(168)    Oct 2016
(Preface for an EPS Special issue)
Sato, N., A. Kadokura, Y. Tanaka, T. Nishiyama, T. Hori, A. S. Yukimatu
J. Geophys. Res.   120    Jun 2015   [Refereed]
We examined a fortuitous case of an omega band pulsating aurora observed simultaneously on the ground at Sanikiluaq in Canada and onboard the THEMIS spacecraft on March 1, 2011. We observed almost the entire process of the generation of the omega ...
Tsuda, T. T., X. Chu, T. Nakamura, M. K. Ejiri, T. D. Kawahara, A. S. Yukimatu, and K. Hosokawa
Geophys. Res. Lett.   42(10) 3647-3653   May 2015   [Refereed]
We report a thermospheric Na layer event (up to 140 km) observed by lidar in the night of 23–24 September 2000 at Syowa (69.0°S, 39.6°E), Antarctica. The thermospheric Na number densities were 2–9 cm−3 at 110–140 km, 3 orders of magnitude smaller ...
Yukimatu, A. S.
Proc. SuperDARN 2014 Workshop   1 P-1-1-P-1-23   May 2015
Triggered by VAP (Van Allen Probe) and ERG (Exploration of energization and Radiation in Geospace) mission plans exploring inner magnetosphere, many debates have been kicked off to discuss on the radar operating modes that are the most suitable fo...
Hori, T., Y. Miyashita, Y. Miyoshi, K. Seki, T. Segawa, Y.-M. Tanaka, K. Keika, M. Shoji, I. Shinohara, K. Shiokawa, Y. Otsuka, S. Abe, A. Yoshikawa, K. Yumoto, Y. Obana, N. Nishitani, A. S. Yukimatu, T. Nagatsuma, M. Kunitake, K. Hosokawa, Y. Ogawa, K. T. Murata, M. Nose, H. Kawano, and T. Sakanoi
J. Sp. Sci. Info. Jpn.   4 (JAXA-RR-14-009) 75-89   Mar 2015   [Refereed]
The Exploration of energization and Radiation in Geospace project Science Center (ERG-SC) has developed the science data file archive and integrated data analysis tool for the ground network observation data of the ERG project. We have organized d...
Syowa SENSU imaging radar status and future prospects -2
Yukimatu, A.S.
Proc. SuperDARN Workshop 2013 in Moose Jaw, Canada      Mar 2014
Hosokawa, K., Y. Takeda, T. Ogawa, A. Kadokura, A. S. Yukimatu, and N. Sato
Antarctic Record   57(3) 317-328   Nov 2013   [Refereed]
This paper reports simultaneous observations of visible noctilucent clouds (NLC) and polar mesosphere summer echoes (PMSE) at Syowa Station (69°01′S, 38°61′E) in Antarctica. During a 1.5 h interval from 2000 to 2130 UT (2300 to 0030 LT) on Feb. 11...
Suzuki, H., T. Nakamura, M. K. Ejiri, T. Ogawa, M. Tsutsumi, M. Abo, T. D. Kawahara, Y. Tomikawa, A. S. Yukimatu, and N. Sato
Ann. Geophys.   31(10) 1793-1803   Oct 2013   [Refereed]
A Rayleigh–Raman lidar system was installed in January 2011 at Syowa Station, Antarctica (69.0° S, 39.6° E). Polar mesospheric clouds (PMCs) were detected by lidar at around 22:30 UTC (LT −3 h) on 4 February 2011, which was the first day of observ...
A. Grocott, K. Hosokawa, T. Ishida, M. Lester, S. E. Milan, M. P. Freeman, N. Sato and A. S. Yukimatu
J. Geophys. Res.   118(9) 5830-5841   Sep 2013   [Refereed]
We present a survey of medium-scale traveling ionospheric disturbances (MSTIDs) observed by a Super Dual Auroral Radar Network HF radar located in the Falkland Islands between May 2010 and April 2011. The radar has a field of view that overlooks t...
LIU Jianjun,HU Hongqiao,HAN Desheng,LIU Yonghua,ZHANG Qinghe,Akira S Yukimatu
Adv. Polar. Sci.   24(1-English) 60-68   Mar 2013   [Refereed]
We present observations of a duskside shock aurora occurred on 21 April 2001 by the SuperDARN radar at Syowa Station and the all-sky camera at Zhongshan Station (ZHS) in Antarctica when the radar was operated in fast-scan mode covering the ZHS reg...
Hori T, N. Nishitani, Y. Miyoshi, Y. Miyashita, K. Seki, T. Segawa, K. Hosokawa, A. S. Yukimatu, Y. Tanaka, N. Sato, M. Kunitake, and T. Nagatsuma
Adv. Polar. Sci.   24(1-English) 69-77   Mar 2013   [Refereed]
The Energization and Radiation in Geospace (ERG) mission seeks to explore the dynamics of the radiation belts in the Earth’s inner magnetosphere with a space-borne probe (ERG satellite) in coordination with related ground observations and simulati...
Syowa SENSU imaging radar and the future perspectives
Yukimatu, A. S., K. Nishimura, M. Tsutsumi, N. Sato and M. Lester
Proc. SuperDARN Workshop 2012 in Shanghai, China   P4-1-P4-37   Jun 2012
Yukimatu, A. S., A. Grocott, S. Fujita and N. Sato
Proc. SuperDARN Workshop 2011 in New Hampshire, USA   CS8-1-CS8-24   Jun 2011
Liu, J. J., H. Q. Hu, D. S. Han, T. Araki, Z. J. Hu, Q. H. Zhang, H. G. Yang, N. Sato, A. S. Yukimatu, and Y. Ebihara
J. Geophys. Res.   116(A03210)    Mar 2011   [Refereed]
We examined temporal variations of a dayside aurora and corresponding ionospheric plasma convection observed by an all-sky camera (ASC) and the Super Dual Auroral Radar Network (SuperDARN) over Zhongshan (ZHS), located at −74.5° in magnetic latitu...
Grocott, A., S. E. Milan, T. K. Yoeman, N. Sato, A. S. Yukimatu and J. A. Wild
J. Geophys. Res.   115(A00I06)    Oct 2010   [Refereed]
We present superposed epoch analyses of the average ionospheric convection response in the northern and southern hemispheres to magnetospheric substorms occurring under different orientations of the interplanetary magnetic field (IMF). Observation...
Taguchi, S., K. Hosokawa, S. Suzuki, A. Tawara, H. U. Frey, J. Matzka, A. S. Yukimatu, and N. Sato
J. Geophys. Res.   115(A10308)    Oct 2010   [Refereed]
On the basis of simultaneous observations from the Super Dual Auroral Radar Network (SuperDARN), the far ultraviolet instrument on the IMAGE spacecraft, and a magnetometer installed on the east coast of Greenland, we present the characteristics of...
Hosokawa, K., T. Motoba, A. S. Yukimatu, S. E. Milan, M. Lester, A. Kadokura, N. Sato, and G. Bjornsson
J. Geophys. Res.   115(A09303)    Sep 2010   [Refereed]
We demonstrate a close association between decameter-scale plasma irregularities in the E region ionosphere and auroral patches in the postmidnight sector. In September 2009, campaign-based measurements of the aurora were conducted in Iceland with...
Yukimatu, A. S., K. Hosokawa, T. Motoba, N. Sato and M. Lester
Proc. CAWSES-II Kickoff Symposium in Japan   103-106   Jul 2010
Development of CDF conversion scheme for SDD fitacf files by ERG-Science Center: A new data analysis platform powered by the THEMIS tool
Hori, T., N. Nishitani, Y. Miyashita, Y. Miyoshi, K. Seki, T. Segawa, K. Hosokawa, A. S. Yukimatu, Y. Tanaka, N. Sato, M. Kunitake, and T. Nagatsuma
Proc. SuperDARN Workshop 2010 in Hermanus, South Africa      Jun 2010
Substorm associated convection in the northern and southern auroral ionospheres
Grocott, A., S. E. Milan, N. Sato, J. A. Wild, T. K. Yeoman, A. S. Yukimatu
Proc. SuperDARN Workshop 2010 in Hermanus, South Africa      Jun 2010
2-D Electric field modulation with pulsating aurora observed with a new SuperDARN high temporal resolution technique
Yukimatu, A. S., K. Hosokawa, T. Motoba, N. Sato, and M. Lester
Proc. SuperDARN Workshop 2010 in Hermanus, South Africa   3-8-1-3-8-30   Jun 2010
Taguchi, S., K. Hosokawa, S. Suzuki, A. S. Yukimatu, and N. Sato
J. Geophys. Res.   115(A05305)    May 2010   [Refereed]
In this study, we report evidence proving the existence of a close relationship between the initial development of a poleward propagating feature of the HF radar backscatter, that is, HF radar polar patch, and a fast azimuthal flow in the cusp. We...
Taguchi, S., S. Suzuki, K. Hosokawa, Y. Ogawa, A. S. Yukimatu, N. Sato, M. R. Collier, and T. E. Moore
J. Geophys. Res.   114(A06211)    Jun 2009   [Refereed]
On 28 March 2001, when the interplanetary magnetic field was strongly duskward, the DMSP F12 spacecraft observed an ion precipitation burst in a latitudinally narrow region near 1200 MLT. A few minutes earlier, the Low Energy Neutral Atom (LENA) i...
Simultaneous observations of visible NLC and SuperDARN-PMSE over Japanese Syowa station in Antarctica
Sato, N., K. Hosokawa, Y. Takeda, T. Ogawa, A. S. Yukimatu, A. Kadokura and M. Tsutsumi
Proc. SuperDARN Workshop 2009 in Corsica      Jun 2009
Small-scale converging electric field structure in the vicinity of breakup auroral arcs
Hosokawa, K., R. Sugita, A. Kadokura, A. S. Yukimatu, N. Sato, S. E. Milan, M. Lester, G. Bjornsson, and T. Saemundsson
Proc. SuperDARN Workshop 2009 in Corsica      Jun 2009
Direct comparison between IF and RF sampling performance with SENSU Syowa Stereo digital SuperDARN system
Yukimatu, A. S., M. Tsutsumi, N. Sato, M. J. Parsons, J. Thornhill, E. C. Thomas, and M. Lester
Proc. SuperDARN Workshop 2009 in Corsica      Jun 2009
Tsutsumi, M., A. S. Yukimatu, D. A. Holdsworth, and M. Lester
Radio Science   44(RS2006)    Mar 2009   [Refereed]
The meteor observation technique based on SuperDARN raw time series analysis has been upgraded. This technique extracts meteor information as biproducts and does not degrade the quality of normal SuperDARN operations. In the upgrade the radar oper...
Taguchi, S., K. Hosokawa, A. Nakao, M. R. Collier, T. E. Moore, N. Sato, and A. S. Yukimatu
J. Geophys. Res.   114(A02311)    Feb 2009   [Refereed]
Recent studies have shown that the motion of the cusp can be deduced from the energetic neutral atom signals detected in the magnetosphere by the Low Energy Neutral Atom (LENA) imager on the IMAGE spacecraft. We use this approach to understand the...
Miyashita, Y., K. Hosokawa, T. Hori, Y. N. Kamide, A. S. Yukimatu, M. Fujimoto, T. Mukai, S. Machida, N. Sato, Y. Saito, I. Shinohara, and J. B. Sigwarth
J. Geophys. Res.   113(A12309)    Dec 2008   [Refereed]
We have studied the response of large-scale ionospheric convection to substorm expansion onsets on the basis of two weak substorms of 1 May 2001, during which a large part of the dawn cell of the two-cell ionospheric convection pattern was monitor...
Jayachandran, P. T., N. Sato, Y. Ebihara, A. S. Yukimatu, A. Kadokura, J. W. MacDougall, E. F. Donovan, and K.Liou
J. Geophys. Res.   113(A08208)    Aug 2008   [Refereed]
Three SuperDARN radars in the afternoon-midnight sector of the auroral oval detected a boundary oscillation, originating near ∼1800 MLT sector. Analysis of the phase of the oscillations measured in three meridians indicates that the disturbance ha...
Borderick, J. D., T. K. Yeoman, A. S. Yukimatu, and D. M. Wright
Proc. SuperDARN workshop 2008 in Newcastle, Australia      Jun 2008
Yukimatu, A. S., K. Nishimura, Y. Ogawa, M. Tsutsumi, N. Sato, M. T. Rietveld, J. D. Borderick, D. M. Wright, T. K. Yeoman, T. R. Robinson, and M. Lester
Proc. SuperDARN workshop 2008 in Newcastle, Australia      Jun 2008
Murata, Y., S. Taguchi, K. Hosokawa, A. Nakano, M. R. Collier, T. E. Moore, N. Sato, H. Yamagishi, A. S. Yukimatu
J. Geophys. Res.   112(A11208)    Nov 2007   [Refereed]
Recent studies have shown that the Low Energy Neutral Atom (LENA) imager on the IMAGE spacecraft in the magnetosphere detects neutral atoms coming from the direction of the high-altitude cusp. The primary source of the neutral atoms has been repor...
Operational meteor wind observations based on raw time series analysis
Tsutsumi, M., A. S. Yukimatu, and M. Lester
Proc. SuperDARN workshop 2007 in Hokkaido, Japan      Jul 2007
fitacf, lag-0 power, new ROS and TMS mode - to fitacfers -
Yukimatu, A. S.
Proc. SuperDARN workshop 2007 in Hokkaido, Japan      Jul 2007
Range Imaging by FDI - heater induced FAIs observed by SuperDARN and EISCAT-
Yukimatu, A. S., K. Nishimura, M. Tsutsumi, Y. Ogawa, N. Sato, D. M. Wright, T. K. Yeoman, M. T. Rietveld, and M. Lester
Proc. SuperDARN workshop 2007 in Hokkaido, Japan      Jul 2007
Status Report of SENSU Syowa South and East radars
Sato, N., and A. S. Yukimatu
Proc. SuperDARN workshop 2007 in Hokkaido, Japan      Jul 2007
Nagai T., A. S. Yukimatu, A. Matsuoka, K. T. Asai, J. C. Green, T. G. Onsager, H. J. Singer
J. Geophys. Res.   111(A11205)    Nov 2006   [Refereed]
We present two event studies of significant enhancements of relativistic electron flux in the slot region of Earth's radiation belts during storms, using electron measurements from the Akebono spacecraft at high altitudes and NOAA 15, 16, 17, and ...
Shiokawa, K., K. Seki, Y. Miyoshi, A. Ieda, T. Ono, M. Iizima, T. Nagatsuma, T. Obara, T. Takashima, K. Asamura, Y. Kasaba, A. Matsuoka, Y. Saito, H. Saito, M. Hirahara, Y. Tonegawa, F. Toyama, M. Tanaka, M. Nose, Y. Kasahara, K. Yumoto, H. Kawano, A. Yoshikawa, Y. Ebihara, A. Yukimatsu, N. Sato, S. Watanabe, and the Inner Magnetosphere Subgroup in the Society of Geomagnetism and Earth, Planetary and Space Sciences
Adv. Space Res.   38(8) 1861-1869   Aug 2006   [Refereed]
The Earth’s inner magnetosphere (inside 10 Re) is a region where particle energy increases to the relativistic energy range. This region is very important as a laboratory where high-energy particle acceleration can be directly measured in a dipola...
Taguchi, S., K. Hosokawa, Y. Murata, A. Nakao, M. R. Collier, T. E. Moore, N. Sato and A. S. Yukimatu
Adv. Polar Upper Atmos. Res.   20 17-26   Aug 2006   [Refereed]
The Low Energy Neutral Atom (LENA) imager on the Imager for Magnetopause-to-Aurora Global Exploration (IMAGE) spacecraft in the magnetosphere can detect neutral particles coming from the direction of the magnetopause. During a period of dynamic pr...
Taguchi, S., K. Hosokawa, A. Nakao, M. R. Collier, T. E. Moore, A. Yamazaki, N. Sato, A. S. Yukimatu
Geophys. Res. Lett.   33(L03101)    Feb 2006   [Refereed]
During a northward interplanetary magnetic field on 27 March 2001, the Low Energy Neutral Atom (LENA) imager on the Imager for Magnetopause-to-Aurora Global Exploration (IMAGE) spacecraft in the magnetosphere observed an enhanced emission in the d...
High resolution studies of the spectral characteristics of particle-driven ULF waves observed in heater-generated radar backscatter
Wright, D. M., T. K. Yeoman, and A. S. Yukimatu
Proc. SuperDARN workshop 2005 in U.K.      Jun 2005
Hosokawa, K., T. Ogawa, N.F. Arnold, M. Lester, N. Sato and A.S. Yukimatu
Geophys. Res. Lett.   32(L12801)    Jun 2005   [Refereed]
An algorithm for automated extraction of polar mesosphere summer echoes (PMSE) from near-range measurements of the Super Dual Auroral Radar Network (SuperDARN) is applied to observations obtained by the Syowa East (69.01°S, 38.61°E) and Iceland Ea...
T. Ogawa, S. Nozawa, M. Tsustsumi, N.F. Arnold, N. Nishitani, N. Sato and A.S. Yukimatu
Ann. Geophys.   22(12) 4049-4059   Dec 2004   [Refereed]
Polar mesosphere summer echoes (PMSEs) have been well studied using vertical incidence VHF radars at northern high-latitudes. In this paper, two PMSE events detected with the oblique incidence SuperDARN HF radars at Hankasalmi, Finland (62.3° N) a...
S. Taguchi, K. Hosokawa, M. R. Collier, T. E. Moore, M.-C. Fok, A. S. Yukimatu, N. Sato and R. A. Greenwald
Adv. Polar Upper Atmos. Res.   18 53-64   Aug 2004   [Refereed]
The Low Energy Neutral Atom (LENA) imager on the IMAGE spacecraft observed significant emission in the high-latitude magnetosheath direction during an extreme solar wind condition on April 11, 2001. The emission was modulated in such a manner that...
On the relationship between spectral characteristics of high-latitude irregularities and small-scale electromagnetic field fluctuations
Hosokawa, K., S. Yamashita, P. Stauning, A. S. Yukimatu, N. Sato, and T. Iyemori
Proc. SuperDARN workshop 2004 in Saskatoon, Canada      May 2004
Statistical analysis of backscatters from first range gates with SENSU Syowa East and CUTLASS Iceland East - an attenmpt to estimate interhemispheric asymmetry in PMSE activities -
Hosokawa, K., T. Ogawa, N. F. Arnold, M. Lester, A. S. Yukimatu, and N. Sato
Proc. SuperDARN workshop 2004 in Saskatoon, Canada      May 2004
Poleward-moving patch of neutral atoms as observed by the IMAGE spacecraft Low Energy Neutral Atom (LENA) imager - manifestation of transient dayside reconnection? -
Hosokawa, K., S. Taguchi, A. Nakano, M. R. Collier, T. E. Moore, M. Lester, A. S. Yukimatu, and N. Sato
Proc. SuperDARN workshop 2004 in Saskatoon, Canada      May 2004
Ionospheric disturbances in conjugate hemispheres during the 23 November 2004 solar eclipse
Sato, N., A. Kadokura, T. Saemundsson, Y. Shinkai, A. S. Yukimatu, T. Ogawa, R. FUjii, J.-P. Villain, S. E. Milan, and M. Lester
Proc. SuperDARN workshop 2004 in Saskatoon, Canada      May 2004
Short time scale characteristics of artificial radar backscatter using the raw time series analysis method of Yukimatu and Tsutsumi (2002)
Wright, D. M., T. K. Yeoman, and A. S. Yukimatu
Proc. SuperDARN workshop 2004 in Saskatoon, Canada      May 2004
Advanced SuperDARN meteor wind observations based on raw time series analysis technique
Tsutsumi, M., A. S. Yukimatu, D. Holdsworth, and M. Lester
Proc. SuperDARN workshop 2004 in Saskatoon, Canada      May 2004
New implementation of digital receivers to new SENSU SuperDARN Syowa Stereo radar
Yukimatu, A. S., M. Tsutsumi, N. Sato, M. Lester, E. C. Thomas
Proc. SuperDARN workshop 2004 in Saskatoon, Canada      May 2004
Raw time series analysis of cusp and heater induced irregularities
Yukimatu, A. S., T. K. Yeoman, D. M. Wright, M. Lester, T. Robinson, M. Tsutsumi, and N. Sato
Proc. SuperDARN workshop 2004 in Saskatoon, Canada      May 2004
Nishitani N., M. Lester, S. E. Milan, T. Ogawa, N. Sato, H. Yamagishi, A. S. Yukimatu, F. J. Rich
J. Geophys. Res.   109(A2)    Feb 2004   [Refereed]
The spectral width of the ionospheric backscatter echoes obtained with the SuperDARN radars has been regarded as a useful tool for locating specific ionospheric regions such as the cusp. In this paper we report the presence of ionospheric echoes w...
K. Hosokawa, S. Yamashita, P. Stauning, N. Sato, A. S. Yukimatu, and T. Iyemori
Ann. Geophys.   22(1) 159-168   Jan 2004   [Refereed]
We perform a case study of a favorable conjunction of an overpass of the Oersted satellite with the field-of-view of the SuperDARN Syowa East radar during an interval of the southward IMF Bz. At the time, the radar observed an L-shell aligned boun...
Hosokawa K., T. Ogawa, A. S. Yukimatu, N. Sato, T. Iyemori
Geophys. Res. Lett.   31(2)    Jan 2004   [Refereed]
An oblique-sounding coherent HF radar of the SuperDARN (Super Dual Auroral Radar Network) at about 11 MHz sometimes receives peculiar backscatter returns, which are suspected as Polar Mesosphere Summer Echoes (PMSE), from ranges very close to the ...
Ogawa, T., K. Hosokawa, N. Nishitani, N. Sato, H. Yamagishi and A. S. Yukimatu
Adv. Polar Upper Atmos. Res.   17 13-29   Sep 2003   [Refereed]
Polar mesosphere summer echoes(PMSE) are strong VHF-UHF radar echoes from the high-latitude cold mesopause at around 80-90km altitudes in summer. Although a number of in situ and radar observations of PMSE have been made until now, generation mech...
Wild, J. A., S. E. Milan, S. W. H. Cowley, M. W. Dunlop, C. J. Owen, M. G. H. Taylor, D. A. Davies, M. Lester, A. S. Yukimatu, N. Sato, A. N. Fazakerley and A. Balogh
Ann. Geophys.   21(8) 1807-1826   Aug 2003   [Refereed]
At 10:00 UT on 14 February 2001, the quartet of ESA Cluster spacecraft were approaching the Northern Hemisphere high-latitude magnetopause in the post-noon sector on an outbound trajectory. At this time, the interplanetary magnetic field incident ...
Hosokawa, K., E. E. Woodfield, M. Lester, S. E. Milan, N. Sato, A. S. Yukimatu, and T. Iyemori
Ann. Geophys.   21(7) 1553-1565   Jul 2003   [Refereed]
Previous studies have shown that dayside equatorward edge of coherent HF radar backscatter having broad Doppler spectral width is coincident with the equatorward edge of the cusp particle precipitation. This enables the boundary between broad and ...
Kataoka, R., H. Fukunishi, K. Hosokawa, H. Fujiwara, A. S. Yukimatu, N. Sato, and Y.-K. Tung
Ann. Geophys.   21(7) 1531-1541   Jul 2003   [Refereed]
Transient production of F-region plasma irregularities due to traveling convection vortices (TCVs) was investigated using the Super Dual Auroral Radar Network (SuperDARN) combined with ground magnetometer networks and the POLAR ultraviolet imager....
Appearance of ionospheric echoes with very narrow spectral width observed by the SuperDARN HF radars and corresponding magnetic field line geometry in the magnetotail region
Nishitani, N., T. Ogawa, M. Lester, S. E. Milan, J. Wild, S. W. H. Cowley, N. Sato, H. Yamagishi, and A. S. Yukimatu
Proc. SuperDARN workshop 2003 in Finland      May 2003
Localized ionospheric ~20mHz ULF waves obtained by the CUTLASS radars during the campaign of the SuperDARN / GEOTAIL simultaneous observation
Shinkai, Y., N. Sato, A. S. Yukimatu, T. Sakurai, Y. Tonegawa, T. Mukai, M. Lester, T. Yeoman, S. E. Milan, J.-P. Villain, G. Sofko, and B. J. Fraser
Proc. SuperDARN workshop 2003 in Finland      May 2003
Simultaneous observation of optical and E-region radar aurora over Iceland during the Syowa-Iceland conjugate campaign
Sato, N., S. E. Milan, M. Lester, A. S. Yukimatu, H. Miyaoka, Y. Shinkai, Y. Murata, H. Deguchi, T. Saemundsson and J.-P. Villain
Proc. SuperDARN workshop 2003 in Finland      May 2003
Simultaneous interhemispheric observations of flow during magnetospheric substorms with SuperDARN
Lester, M., G. Provan, S. E. Milan, N. Sato, H. Yamagishi, and A. S. Yukimatu
Proc. SuperDARN workshop 2003 in Finland      May 2003
Raw time series analysis of heater induced irregularities
Yukimatu, A. S., M. Lester, T. K. Yeoman, D. M. Wright, T. R. Robinson, M. T. Rietveld, M. Tsutsumi, and N. Sato
Proc. SuperDARN workshop 2003 in Finland      May 2003
Raw time series analysis of cusp irregularities
Yukimatu, A. S., M. Lester, T. K. Yeoman, S. E. Milan, M. Tsutsumi, and N. Sato
Proc. SuperDARN workshop 2003 in Finland      May 2003
Improvement of SuperDARN meteor wind measurements with raw time series analysis method
Yukimatu, A. S., M. Tsutsumi, M. Lester, S. E. Milan, and N. Sato
Proc. SuperDARN workshop 2003 in Finland      May 2003
Nishitani, N., V. Papitashvili, T. Ogawa, N. Sato, H. Yamagishi, A. S. Yukimatu, and F. J. Rich
J. Geophys. Res.   108(A5) 1184   May 2003   [Refereed]
Ionospheric convection over the southern polar cap on 11–12 May 1999 has been studied by using the Syowa East and South HF radar data and the DMSP ion driftmeter data, when the solar wind density was very low and geomagnetic activity was low. The ...
Hosokawa, K., M. Sugino, M. Lester, N. Sato, A. S. Yukimatu and T. Iyemori
J. Geophys. Res.   107(A12) 1457   Dec 2002   [Refereed]
Dusk scatter event (DUSE) (first reported by Ruohoniemi et al. [1988]) is one of the most reproducible features among the SuperDARN radar backscatter within the subauroral ionosphere. Hosokawa et al. [2001] analyzed the scattering occurrence perce...
Kadokura, A., A. S. Yukimatu, M. Ejiri, T. Oguti, M. Pinnock, and P. R. Sutcliffe
J. Geophys. Res.   107(A12) 1480   Dec 2002   [Refereed]
We have analyzed in detail the auroral bulge evolution during the expansion phase of an isolated substorm, which was observed by the UV imager aboard the Akebono satellite. It was found that there were three distinct stages in the evolution. Stage...
Kadokura, A., A. S. Yukimatu, M. Ejiri, T. Oguti, M. Pinnock, and M. R. Hairston
J. Geophys. Res.   107(A12) 1479   Dec 2002   [Refereed]
We have analyzed in detail the evolution of nightside auroral activities and ionospheric convection during the growth phase of an isolated substorm. The following three characteristic auroral activities were identified by meridian scanning photome...
Sakanoi, T., H. Fukunishi, S. Okano, N. Sato, H. Yamagishi, A. S. Yukimatu
J. Geophys. Res.   107(A11) 1388   Nov 2002   [Refereed]
Simultaneous measurements of neutral winds and plasma drifts have been carried out to clarify the local neutral-ion coupling processes in the auroral F region. High-resolution maps of thermospheric winds and plasma drifts were made using data obta...
Matsuoka, H., A. S. Yukimatu, H. Yamagishi, N. Sato, G. J. Sofko, B. J. Fraser, P. Ponomarenko, R. Liu, and T. Goka
J. Geophys. Res.   107(A11) 1400   Nov 2002   [Refereed]
In spite of accumulated observations of ULF pulsations, there are no satisfactory explanations for the generation and transmission mechanisms of Pc3 pulsations at very high latitudes. We studied the characteristics of the high-latitude Pc3 pulsati...
Yukimatu, A. S., and M. Tsutsumi
Geophys. Res. Lett.   29(20) 1981   Oct 2002   [Refereed]
SuperDARN meteor wind measurements in the mesopause region using the standard analysis of ACFs constructed from the multi-pulse sequence have several shortcomings. To overcome them, we have developed a new method to enable raw time series analysis...
Makarevitch, R. A., A. V. Koustov, K. Igarashi, K. Ohtaka, T. Ogawa, N. Nishitani, N. Sato, H. Yamagishi, and A. S. Yukimatu
Adv. Polar Upper Atmos. Res.   16 59-83   Sep 2002   [Refereed]
In this study, characteristics of the auroral E-region echoes at two significantly different radar frequencies of 12 and 50 MHz are compared. Considered observations were performed at the Syowa Antarctic station in March of 1997 using two HF and o...
Ogawa, T., N. Nishitani, N. Sato, H. Yamagishi, and A. S. Yukimatu
Adv. Polar Upper Atmos. Res.   16 84-98   Sep 2002   [Refereed]
E region radar echo parameters (echo power, Doppler velocity and spectral width) obtained with the Syowa Station HF radar under disturbed geomagnetic conditions are qualitatively analyzed to study how echoing region changes due to HF wave refracti...
Yukimatu, A. S., M. Tsutsumi, H. Yamagishi and N. Sato
Adv. Polar Upper Atmos. Res.   16 181-192   Sep 2002   [Refereed]
DC offsets in quadrature outputs (I/Q signals) pertinent to the SuperDARN HF radars can cause problems in determining and analysing auto-correlation functions, cross-correlation functions and raw time series data if they are not negligible. We hav...
Hosokawa, K., E. E. Woodfield, M. Lester, S. E. Milan, N. Sato, A. S. Yukimatu and T. Iyemori
Ann. Geophys.   20(8) 1213-1223   Aug 2002   [Refereed]
We performed a statistical analysis of the occurrence distribution of Doppler spectral width around the day-side high-latitude ionosphere using data from the conjugate radar pair composed of the CUTLASS Iceland-East radar in the Northern Hemispher...
SuperDARN HF Radar Signatures of Traveling Convection Vortices
Kataoka, R., H. Fukunishi, A. S. Yukimatu, N. Sato, K. Hosokawa, and SuperDARN PIs
Proc. SuperDARN workshop 2002   2.12.1-2.12.30   May 2002
GEOTAIL/SuperDARN Simultaneous Observations in Order to Investigate the Pc 3 ULF Waves
Shinkai, Y., N. Sato, A. S. Yukimatu, M. Lester, S. E. Milan, J.-P. Villain, G. Sofko, T. Sakurai, and Y. Tonegawa, SuperDARN/GEOTAIL Research Group
Proc. SuperDARN workshop 2002   2.3.1-2.3.23   May 2002
Interhemispheric Comparison of Spectral Width Boundary as Observed by the SuperDARN Radars
Hosokawa, K., E. E. Woodfield, M. Lester, S. E. Milan, N. Sato, A. S. Yukimatu
Proc. SuperDARN workshop 2002   5.4.1-5.4.10   May 2002
ULF Waves Detected by the Coordinated Observation of GEOTAIL, CUTLASS, and EISCAT Heater Experiment on January 17, 2002
Tonegawa, Y., T. Sakurai, N. Sato, Y. Shinkai, A. S. Yukimatu, T. Aso, M. Lester, T. K. Yeoman, and M. T. Rietveld
Proc. SuperDARN workshop 2002   2.7.1-2.7.11   May 2002
Ionospheric Echoes With High Velocities and Very Narrow Spectral Widths Observed by the SuperDARN Radars During High Geomagnetic Activity
Nishitani, N., T. Ogawa, N. Sato, H. Yamagishi, A. S. Yukimatu, M. Lester
Proc. SuperDARN workshop 2002   4.3.1-4.3.25   May 2002
Polar Mesosphere Summer Echoes Detected With the SuperDARN Radars
Ogawa, T., N. F. Arnold, N. Nishitani, N. Sato, H. Yamagishi, and A. S. Yukimatu
Proc. SuperDARN workshop 2002   3.3.1-3.3.3   May 2002
Bifurcating Cusp Aurora and Transient Traveling Auroral Vortices (TTAVs) under Large IMF By Condition
Sato, N., H. Yang, H. Hu, R. Liu, H. Yamagishi, A. S. Yukimatu, M. Kikuchi, Y. Murata, S. E. Milan, M. Lester, and T. Iijima
Proc. SuperDARN workshop 2002   2.10.1-2.10.16   May 2002
Development of I/Q DC offset monitoring and removal code
Yukimatu, A. S., and M. Tsutsumi
Proc. SuperDARN workshop 2002   7.2.1-7.2.9   May 2002
Comparison of new SuperDARN raw time series neutral wind data with SD ACF and MF radar data obtained at Syowa, Antarctica: preliminary results
Yukimatu, A. S., and M. Tsutsumi
Proc. SuperDARN workshop 2002   7.1.1-7.1.12   May 2002
An application of raw time series analysis method to MLT region dynamics: improvement of meteor wind measurements
Yukimatu, A. S., and M. Tsutsumi
Proc. SuperDARN workshop 2002   3.4.1-3.4.27   May 2002
Development of raw time series analysis method using unequally spaced multi-pulse observation data
Yukimatu, A. S., and M. Tsutsumi
Proc. SuperDARN workshop 2002   3.3.1-3.3.16   May 2002
Ogawa, T., N. Nishitani, N. Sato, H. Yamagishi, and A. S. Yukimatu
Geophys. Res. Lett.   29(7) 1157   Apr 2002   [Refereed]
Peculiar HF radar echoes observed at Syowa Station, Antarctica (69.0°S, 39.6°E) are reported. The echoes occurred in summer at slant ranges between 180 (first range gate) and 315 km under very quiet geomagnetic conditions. They are characterized b...
GEOTAIL/SuperDARN cooperative Study for Pc 3 ULF Waves
Shinkai, Y., N. Sato, A. S. Yukimatu, M. Lester, S. E. Milan, T. Sakurai, Y. Tonegawa, SuperDARN PIs and SuperDARN/GEOTAIL Research Group
Proc. COSPAR Colloquium "Frontiers of Magnetospheric Plasma Physics" Celebrating 10 Years of GEOTAIL Operation   108(A5)   2002
Characteristics of 12- and 3-m E-Region Irregularities as Observed at Syowa, Antarctica
Koustov, A. V., R. A. Makarevitch, T. Ogawa, N. Nishitani, K. Igarashi, K. Ohtaka, N. Sato, H. Yamagishi, A. S. Yukimatu
Proc. 2001 Asia Pacific-Radio Science Conference   p.349   2001
Effect of Tenuous Solar Wind on High Latitude Ionospheric Convection
Nishitani, N., T. Ogawa, N. Sato, H. Yamagishi, A. S. Yukimatu
Proc. 2001 Asia Pacific-Radio Science Conference   p.347   2001
Source of plasma irregularities in the subauroral F region as observed by the SuperDARN radars
Hosokawa, K., T. Iyemori, A. S. Yukimatu, N. Sato, M. Sugino
Proc. 2001 Asia Pacific-Radio Science Conference   p.346   2001

Misc

 
A new SuperDARN meteor wind measrement:Raw time series analysis method and its application to mesopause region dynamics
Geophysical Research Letters   29(20) 1981   2002
New sounding modes for SuperDARN HF radars
Advances in Polar Upper Atmosphere research   15 135-145   2001
The Ionospheric Cusp's Response to Impulsive IMF Changes
Proc. International SuperDARN workshop 1998   768-785   1998
Structural Variation of Radiation Belt associated with solar Flare and SC Events Observed by Radiation Monitor(RDM)Aboard AKEBONO(EXOS-D)
Proc. 8th International Symposium on Solar Terrestrial Physics dedicated to STEP   Part 1(150)    1994
Yukimatu Akira
Antarctic Record   36(2) 294-309   1992
In 1989,when the sun was highly active, interference noises were often observed by 30-MHz riometers at Asuka and Syowa Stations in Antarctica. The noises showed a systematic diurnal and seasonal variation. The noises were global phenomena because ...

Conference Activities & Talks

 
Yukimatu, A. S. and N. Sato
URSI-JRSM 2019 (2019 URSI-Japan Radio Science Meeting)   5 Sep 2019   Japan National Committee of URSI (JNC-URSI)
Sato, N., T. Ogawa, H. Yamagishi, A. S. Yukimatu, N. Nishitani, T. Kikuchi, K. Nozaki, K. Igarashi, T. Nagatsuma
URSI-JRSM 2019 (2019 URSI-Japan Radio Science Meeting)   5 Sep 2019   Japan National Committee of URSI (JNC-URSI)
Sato, N., T. Ogawa, H. Yamagishi, A. S. Yukimatu, N. Nishitani, T. Kikuchi, K. Nozaki, T. Nagatsuma
SuperDARN Workshop 2019   6 Jun 2019   NICT, NIPR, ISEE/Nagoya U, UEC, ICSWE/Kyusyu U
Kadowaki, Y., A. S. Yukimatu, T. Nagatsuma, N. Nishitani, T. Hori, K. Hosokawa, M. Watanabe, H. Kawano, K. Sakaguchi, A. Nakamizo
SuperDARN Workshop 2019   6 Jun 2019   NICT, NIPR, ISEE/Nagoya U, UEC, ICSWE/Kyusyu U.
Yukimatu, A. S.
SuperDARN Workshop 2019   6 Jun 2019   NICT, NIPR, ISEE/Nagoya U., UEC, ICSWE/Kyushu U.
Kawano, H., A. S. Yukimatu, N. Nishitani, Y. Tanaka, S. Saita, T. Hori
SuperDARN Workshop 2019   5 Jun 2019   NICT, NIPR, ISEE/Nagoya U., UEC, ICSWE/Kyushu U.
Hori, T., N. Nishitani, A. S. Yukimatu, T. Nagatsuma, K. Hosokawa, H. Kawano, M. Watanabe, Y. Miyoshi, I. Shinohara
SuperDARN Workshop 2019   4 Jun 2019   NICT, NIPR, ISEE/Nagoya-U., EUC, Kyushu Univ.
Tanaka, Y., T. Nishiyama, A. Kadokura, M. Ozaki, Y. Miyoshi, K. Shiokawa, S-I. Oyama, R. Kataoka, M. Tsutsumi, K. Nishimura, K. Sato, Y. Kasahara, A. Kumamoto, F. Tsuchiya, M. Fukizawa, M. Hikishima, S. Matsuda, A. Matsuoka, I. Shinohara, M. Nose, T. Nagatsuma, M. Shinohara, A. Fujimoto, M. Teramoto, R. Nomura, A. S. Yukimatu, K. Hosokawa, M. Shoji, R. Latteck
SuperDARN Workshop 2019   3 Jun 2019   NICT, NIPR, ISEE/Nagoya U. UEC, ICSWE/Kyushu U.
Prikryl, P., J. Weygand, R. Ghoddousi-Fard, P. Jayachandran, D. Themens, A. McCaffrey, B. Kunduri, E. Spanswick, Y. Zhang, A. S. Yukimatu
JpGU (Japan Geoscience Union) Meeting 2019   30 May 2019   JpGU (Japan Geoscience Union)
The ionospheric structure caused by precipitation of high energy particles can adversely affect the GPS causing phase scintillation and cycle slip (loss of lock). GPS phase scintillation correlates with the intensity of the aurora, especially the ...
Sato, N., A. S. Yukimatu, Y. Tanaka, T. Hori, A. Kadokura, T. Sakurai, D. Han, Y. Ma, Q. Zhang
JpGU (Japan Geoscience Union) Meeting 2019   30 May 2019   JpGU (Japan Geoscience Union)
Pc5 poleward moving auroral arc (PMAA) pulsations observed on the ground in the post-midnight sector exhibit east-west-aligned auroral arcs elongated ~ 1000-3000 km and behave poleward moving form with a recurrence period of ~ 2-10 minutes (Pc5 ra...
Kawano, H., A. S. Yukimatu, N. Niashitani, Y. Tanaka, S. Saita, T. Hori
JpGU (Japan Geoscience Union) Meeting 2019   29 May 2019   JpGU (Japan Geoscience Union)
The FLR (Field Line Resonance) takes place where the frequency of an incoming wave matches the eigen-frequency of magnetospheric magnetic field lines, and excites the eigen-oscillation of the field lines. The FLR can be identified by using the uni...
Tanaka, Y.-M., T. Nishiyama, A. Kadokura, M. Ozaki, Y. Miyoshi, S.-I. Oyama, R. Kataoka, M. Tsutsumi, K. Nishimura, K. Sato, Y. Kasahara, A. Kumamoto, F. Tsuchiya, M. Fukizawa, M. Hikishima, S. Matsuda, A. Matsuoka, I. Shinohara, M. Nose, T. Nagatsuma, M. Shinohara, A. Fujimoto, M. Teramoto, R. Nomura, A. S. Yukimatu, K. Hosokawa, M. Shoji, R. Latteck
JpGU (Japan Geoscience Union) Meeting 2019   27 May 2019   JpGU (Japan Geoscience Union)
Akira Sessai Yukimatu
JpGU (Japan Geoscience Union) Meeting 2019   26 May 2019   JpGU (Japan Geoscience Union)
Prikryl, P., J. M. Weygand, R. Ghoddousi-Fard, P. T. Jayachandran, D. R. Themens, A. M. McCaffrey, B. S. R. Kunduri, E. Spanswick, Y. Zhang, A. S. Yukimatu
JpGU (Japan Geoscience Union) Meeting 2019   26 May 2019   JpGU (Japan Geoscience Union)
Tanaka, Y.-M., T. Nishiyama, A. Kadokura, M. Ozaki, Y. Miyoshi, S.-I. Oyama, R. Kataoka, M. Tsutsumi, K. Nishimura, K. Sato, Y. Kasahara, A. Kumamoto, F. Tsuchiya, M. Fukizawa, M. Hikishima, S. Matsuda, A. Matsuoka, I. Shinohara, M. Nose, T. Nagatsuma, M. Shinohara, A. Fujimoto, M. Teramoto, R. Nomura, A. S. Yukimatu, K. Hosokawa, M. Shoji, R. Latteck
11th Arase/ERG Science Meeting   5 Mar 2019   ISEE, Nagoya Univ., JAXA/ISAS
Kawano, H., A. S. Yukimatu, N. Nishitani, Y. Tanaka, S. Saita, T. Hori
9th Symposium on Polar Science   5 Dec 2018   NIPR
Yukimatu, A. S.
9th Symposium on Polar Science   5 Dec 2018   NIPR
SuperDARN (Super Dual Auroral Radar Network) is an international high-frequency radar network and a powerful and unique tool primarily contributed to space weather researches by providing global (high and mid-latitude) ionospheric plasma convectio...
Sato, N., A. S. Yukimatu, Y. Tanaka, T. Hori, A. Kadokura, T. Sakurai
9th Symposium on Polar Science   5 Dec 2018   NIPR
Kadokura, A., Y. Tanaka, R. Kataoka, H. A. Uchida, M. Okasa, Y. Ogawa, M. Taguchi, M. Ozaki, K. Shiokawa, Y. Sato, M. Kamogawa, Y. Minamoto, K. Hosokawa, T. Motoba, A. S. Yukimatu, H. Yamagishi, and N. Sato
9th Symposium on Polar Science   5 Dec 2018   NIPR
Kawano, H., A. S. Yukimatu, N. Nishitani, Y. Tanaka, S. Saita, T. Hori
SGEPSS 2018 fall meeting   27 Nov 2018   SGEPSS
Sato, N., A. S. Yukimatu, Y. Tanaka, T. Hori, A. Kadokura, T. Sakurai
SGEPSS 2018 fall meeting   26 Nov 2018   SGEPSS
We report results from a detailed analysis of a Pc5 poleward moving auroral arc (PMAA) pulsation event using the ground-based THEMIS all-sky imager and magnetometer network observations and the coordinated onboard THEMIS-A, D, E satellites. It is ...
Yukimatu, A. S.
SGEPSS 2018 fall meeting   25 Nov 2018   SGEPSS
Tanaka, Y.-M., T. Nishiyama, A. Kadokura, M. Ozaki, Y. Miyoshi, K. Shiokawa, S. Oyama, R. Kataoka, M. Tsutsumi, K. Nishimura, K. Sato, Y. Kasahara, A. Kumamoto, F. Tsuchiya, M. Fukuzawa, M. Hikishima, S. Matsuda, A. Matsuoka, M. Nose, T. Nagatsuma, M. Shinohara, A. Fujimoto, M. Teramoto, R. Nomura, A. S. Yukimatu, K. Hosokawa, M. Shoji, and R. Latteck
脈動オーロラ研究集会(平成30年度名古屋大学宇宙地球環境研究所研究集会)   31 Oct 2018   ISEE, Nagoya Univ., Japan
Energetic electron precipitation to polar mesosphere observed by comprehensive observation
Tanaka, Y., T. Nishiyama, A. Kadokura, M. Ozaki, Y. Miyoshi, K. Shiokawa, S. Oyama, R. Kataoka, M. Tsutsumi, K. Nishimura, K. Sato, Y. Kasahara, A. Kumamoto, F. Tsuchiya, M. Fukuzawa, M. Hikishima, S. Matsuda, A. Matsuoka, M. Nose, T. Nagatsuma, M. Shinohara, A. Fujimoto, M. Teramoto, R. Nomura, A. S. Yukimatu, K. Hosokawa, M. Shoji, and R. Latteck
PWING mid-point evaluation meeting   19 Oct 2018   PWING project
SuperDARN near range echoes and neutral wind observing network
Yukimatu, A. S.
SuperDARN science meeting 2018   16 Oct 2018   ISEE, Nagoya Univ., NIPR, NICT
Study of dynamics of the arctic ionosphere and upper atmosphere using the SuperDARN network
Nishitani, N., T. Nagatsuma, A. S. Yukimatu
第2回JCAR北極域研究計画ワークショップ   21 Sep 2018   NIPR/JCAR
Yukimatu, A. S., T. Nagatsuma, N. Nishitani, K. Hosokawa, H. Kawano, M. Watanabe, T. Hori, M. Lester
南極観測シンポジウム2018ー将来のサイエンスの方向性ー   31 Jul 2018   NIPR
国際短波レーダー超高層大気観測網プロジェクトSuperDARN (Super Dual Auroral Radar Network)は、1995年に極地研も参加して創設され、爾来今日に至るまで、その参加国、参加研究機関、レーダー数、観測視野を飛躍的に増やしながら発展してきた。当初の目的は、従来(衛星による軌道上のみ、或いは長期間平均描像取得しか)観測手段が存在しなかった両極域の地球規模のプラズマ対流の広域分布と時間発展を時々刻々高い時間分解能で捉え、太陽風変動等に伴うその動態を研究すること...
Tanaka, Y., R. Kataoka, A. S. Yukimatu, A. Kadokura, H. Miyaoka, Y. Ogawa, T. Nishiyama, S. Fujita, T. Tanaka, Y. Ebihara, S. Nakano, S. Saita, A. Nakamizo
南極観測シンポジウム2018ー将来のサイエンスの方向性ー   31 Jul 2018   NIPR
Yukimatu, A. S.
SuperDARN Workshop 2018   4 Jun 2018   IRAP (L'Institut de Recherche en Astrophysique et Planétologie), Toulouse, France
Hall et al., 1997 started SuperDARN neutral wind measurement using grainy near range echoes(GNREs) by assuming GNREs with low spectral width and velocities were dominated with underdense meteor echoes. Yukimatu and Tsutsumi, 2002 developed a new r...
Hori, T., N. Nishitani, A. S. Yukimatu, T. Nagatsuma, K. Hosokawa, H. Kawano, M. Watanabe, M. Teramoto
SuperDARN Workshop 2018   4 Jun 2018   IRAP (L'Institut de Recherche en Astrophysique et Planétologie), Toulouse, France
Yukimatu., A. S.
JpGU (Japan Geoscience Union) Meeting 2018   24 May 2018   JpGU (Japan Geoscience Union)
Tanaka, Y., T. Nishiyama, A. Kadokura, M. Ozaki, K. Shiokawa, M. Tsutsumi, R. Kataoka, Y. Miyoshi, S.I. Oyama, A. Matsuoka, Y. Kasahara, A. Kumamoto, F. Tsuchiya, F. Mizuki, M. Hikishima, S. Matsuda, M. Nose, T. Nagatsuma, K. Nishimura, K. Sato, M. Shinohara, A. Fujimoto, M. Teramoto, R. Nomura, A. S. Yukimatu
JpGU (Japan Geoscience Union) Meeting 2018   21 May 2018   JpGU (Japan Geoscience Union)
We investigate Polar Mesosphare Winter Echoes (PMWE) accompanied by an isolated substorm around 04 UT on March 21, 2017, which occurred during the passage of corotating interaction region (CIR). Various phenomena associated with the substorm were ...
Sato, N., A. S. Yukimatu, Y. Tanaka, T. Hori, A. Kadokura, T. Sakurai
JpGU (Japan Geoscience Union) Meeting 2018   20 May 2018   JpGU (Japan Geoscience Union)
Kawano, H., A. S. Yukimatu, N. Nishitani, Y. Tanaka, S. Saita, T. Hori, K. Iida
JpGU (Japan Geoscience Union) Meeting 2018   20 May 2018   JpGU (Japan Geoscience Union)
SuperDARN future plan
Yukimatu, A. S., T. Nagatsuma, N. Nishitani
国立極地研究所研究集会「極域における宙空圏観測・研究の将来構想に関する研究集会」   8 May 2018   NIPR
SuperDARN 2点で同時観測されたSC時FLRからのプラズマ圏密度2次元推定
Kawano, H., N. Nisitani, A. S. Yukimatu, Y. Tanaka, S, Saita, T. Hori, K. Iida
電磁圏物理学シンポジウム   14 Mar 2018   Nagoya Univ., ISEE
Tanaka, Y.-M., T. Nishiyama, A. Kadokura, M. Ozaki, K. Shiokawa, S. Oyama, M. Nose, T. Nagatsuma, M. Tsutsumi, K. Nishimura, K. Sato, Y. Miyoshi, Y. Kasahara, A. Kumamoto, F. Tsuchiya, M. Hikishima, S. Matsuda, A. Matsuoka, M. Shinohara, A. Fujimoto, M. Teramoto, R. Nomura, R. Kataoka, and A. S. Yukimatu
Fifth International Symposium on Arctic Research (ISAR-5)   17 Jan 2018   Japan Consortium of Arctic Environmental Research (JCAR) and National Institute of Polar Research (NIPR)
We studied an isolated substorm observed during the first campaign of Arase (ERG) satellite and ground-based coordinated observations. The isolated substorm occurred around 04:00 UT on March 21, 2017 in association with a southward Bz excursion du...
Shiokawa, K., S. Abe, R. Fujii, K. Hashimoto, K. Hosokawa, M. Ishii, A. Kadokura, R. Kataoka, H. Kawano, T. Kikuchi, K. Kitamura, S. Kurita, Y. Miyashita, Y. Miyoshi, T. Nagatsuma, N. Nishitani, M. Nose, Y. Obana, Y. Ogawa, H. Ohya, M. Okada, Y. Otsuka, S.-I. Oyama, M. Ozaki, S. Saita, K. Sakaguchi, T. Sakanoi, N. Sato, A. Shinbori, M. Shinohara, S. Suzuki, H. Tadokoro, M. Taguchi, N. Takahashi, Y. Tanaka, T. Tanimori, F. Tsuchiya, H. Yamagisi, A. Yoshikawa, A. S. Yukimatu
18th Space Science Symposium   9 Jan 2018   JAXA/ISAS
あらせ(ERG)プロジェクトでは、近年急速に発達してきた地上観測ネットワークとあらせ衛星を動的に結合した観測が実施されている。本講演では、地上多点ネットワークにおける磁場・電場・光・電波計測によるジオスペースのグローバルな場の把握の成果と、あらせ衛星と連携した観測の初期成果について紹介する。
Akira Sessai Yukimatu
8th Symposium on Polar Science   5 Dec 2017   NIPR
SuperDARN – Super Dual Auroral Radar Network – is an international HF radars network since 1995 which is a uniq tool to eneble us to obtain quasi real-time global space weather map in high temporal resolution at ionospheric altitude, and whose dat...
Tanaka, Y., T. Nishiyama, A. Kadokura, M. Ozaki, K. Shiokawa, S-I. Oyama, M. Nose, T. Nagatsuma, M. Tsutsumi, K. Nishimura, K. Sato, Y. Miyoshi, Y. Kasahara, A. Kumamoto, F. Tsuchiya, M. Hikishima, S. Matsuda, A. Matsuoka, M. Shinohara, A. Fujimoto, M. Teramoto, R. Nomura, R. Kataoka, and A. S. Yukimatu
8th Symposium on Polar Science   5 Dec 2017   NIPR
We investigated an isolated substorm observed during the first campaign of Arase (ERG) satellite and ground-based
coordinated observations. The isolated substorm started around 04:00 UT on March 21, 2017 in association with a southward
Bz excursio...
Sato, N., A. S. Yukimatu, Y,. Tanaka, T. Hori, A. Kadokura
8th Symposium on Polar Science   5 Dec 2017   NIPR
Pc 5 auroral arc pulsations observed on the ground exhibit east-west-aligned auroral arcs elongated ~ 1000-3000 km and
behave poleward moving form with the recurrence period of ~ 2-10 minutes (Pc 5 range). Ground-based magnetic field
variations (P...
Kawano, H., A. S. Yukimatu, Y. Tanaka, S. Saita, N. Nishitani, T. Hori, K. Iida
8th Symposium on Polar Science   5 Dec 2017   NIPR
Geomagnetic pulsations include field-line eigen-oscillations generated by the field-line resonance (FLR). Their frequencies depend on the plasma density along the field line. The FLR frequency is expected to change sharply across the plasmapause, ...
Pc 5 poleward moving auroral arc (PMAA) 脈動のパッチ状脈動オーロラへの重ね書き現象
Sato, N., A. S. Yukimatu, Y. Tanaka, T. Hori and A. Kadokura
脈動オーロラ研究集会(平成29年度名古屋大学宇宙地球環境研究所研究集会)   13 Nov 2017   ISEE, Nagoya Univ., Japan
Yukimatu, A. S.
142nd SGEPSS 2017 fall meeting   18 Oct 2017   SGEPSS
Kadokura, A., Y. Tanaka, R. Kataoka, H. A. Uchida, M. Okada, Y. Ogawa, Y. Sato, M. Taguchi, M. Ozaki, K. Shiokawa, K. Hosokawa, Y. Miyoshi, T. Motoba, A. S. Yukimatu, H. Yamagishi, and N. Sato
142nd SGEPSS 2017 fall meeting   16 Oct 2017   SGEPSS
Current status of the upper atmosphere physics observation between Iceland and Syowa Station, Antarctica (geomagnetic conjugate observation) will be explained. As for the observations in Iceland, re-construction of observations has been carried ou...
Kawano, H., A. S. Yukimatu, N. Nishitani, Y. Tanaka, S. Saita, T. Hori, K. Iida
142nd SGEPSS 2017 fall meeting   16 Oct 2017   SGEPSS
Sato, N., A. S. Yukimatu, Y. Tanaka, T. Hori and A. Kadokura
142nd SGEPSS 2017 fall meeting   16 Oct 2017   SGEPSS
Tanaka, Y., T. Nishiyama, A. Kadokura, M. Ozaki, K. Shiokawa, S-I. Oyama, M. Nose, T. Nagatsuma, M. Tsutsumi, K. Nishimura, K. Sato, Y. Miyoshi, Y. Kasahara, A. Kumamoto, F. Tsuchiya, M. Hikishima, S. Matsuda, A. Matsuoka, R. Kataoka, and A. S. Yukimatu
142nd SGEPSS 2017 fall meeting   16 Oct 2017   SGEPSS
オメガバンドオーロラのドリフト速度とSuperDARNで観測した電離圏流速との同時観測
Sato, N., A. S. Yukimatu, Y. Tanaka, T. Hori and T. Nagatsuma
極域・中緯度SuperDARN研究集会   12 Sep 2017   NICT, NIPR and ISEE, Nagoya Univ.
SuperDARN Japan webサイトの紹介
Kadowaki, Y., A. S. Yukimatu, T. Nagatsuma, N. Nishitani, T. Hori, K. Hosokawa, M. Watanabe, H. Kawano
極域・中緯度SuperDARN研究集会   12 Sep 2017   NICT, NIPR and ISEE, Nagoya Univ.
SuperDARN昭和SENSUレーダー現況と第IX期南極観測計画
A. S. Yukimatu
極域・中緯度SuperDARN研究集会   11 Sep 2017   NICT, NIPR and ISEE, Nagoya Univ.
Yukimatu, A. S.
SuperDARN Workshop 2017   6 Jun 2017   INAF/IAPS (Institute for Space Astrophysics and Planetology), Italy
Sato, N., A. S. Yukimatu, Y. Tanaka, T. Hori, T. Nagatsuma
SuperDARN Workshop 2017   Jun 2017   INAF/IAPS (Institute for Space Astrophysics and Planetology), Italy
Omega band auroras are generally observed in the post-midnight and morning sectors during the recovery phases of magnetospheric substorms. They typically have sizes of 400–1000 km and usually drift eastward at speeds of 0.3–2 km/s. The mechanism r...
Sato, N., A. S. Yukimatu, Y. Tanaka, T. Hori, A. Kadokura
JpGU-AGU Joint Meeting 2017   21 May 2017   JpGU (Japan Geoscience Union)
Using the ground-based all-sky imagers we examined the long period (T~ 2-10 min) east-west band type auroral pulsations which are completely different from well-known pulsating auroras with period of ~ 10 second. Fundamental characteristics of thi...
Kawano, H., A. S. Yukimatu, N. Nishitani, Y. Tanaka, S. Saita, T. Hori, K. Iida
ISEE研究集会「プラズマ圏の観測とモデリング」(共催:PSTEP)   6 Mar 2017   ISEE, Nagoya Univ., Japan
Shiokawa, K. S. Abe, R. Fujii, K. K. Hashimoto, K. Hosokawa, M. Ishii, A. Kadokura, H. Kawano, T. Kikuchi, K. Kitamura, Y. Miyashita, Y. Miyoshi, T. Nagatsuma, N. Nishitani, Y. Obana, Y. Ogawa H. Oya, M. Okada, Y. Otsuka, S. Oyama, M. Ozaki, S. Saita, N. Sato, M. Shinohara, H. Tadokoro, M. Taguchi, Y. Tanaka, T. Tanimori, N. Tsuchiya, H. Yamagishi, A. Yoshikawa, A. S. Yukimatu, K. Yumoto
17th Space Science Symposium   5 Jan 2017   JAXA/ISAS, Japan
Sato, N., A. S. Yukimatu, Y. Tanaka, T. Hori, and A. Kadokura
2016 AGU fall meeting   12 Dec 2016   AGU (American Geophysical Union)
We examined Omega band auroras observed with the THEMIS ground based all-sky imager network. Using 8 years data from January 2007 we found a large number of events (~ 330) that showed characteristics of omega band aurora. We examined optical signa...
Kadokura, A., Y. Tanaka, Y. Sato, R. Kataoka, M. Okada, Y. Ogawa, M. Taguchi, M. Ozaki, K. Hosokawa, A. S. Yukimatu, H. Yamagishi, and N. Sato
The 7th Symposium on Polar Science   29 Nov 2016   National Institute of Polar Research, Japan
Current status and future plan of the upper atmosphere physics observation between Iceland and Syowa Station, Antarctica (geomagnetic conjugate observation) will be explained. As for the observations in Iceland, re-construction of observations has...
Nishitani, N., T. Hori, A. S. Yukimatu, and T. Nagatsuma
The 7th Symposium on Polar Science   29 Nov 2016   National Institute of Polar Research, Japan
Watanabe and Nishitani (Adv. Polar Sci., 2013) showed that during solar flares the SuperDARN data show positive Doppler velocities in ground / sea scatter echoes, and that this velocity change can be interpreted mainly in terms of the abnormal
ion...
Hori, T., A. S. Yukimatu, and N. Nishitani
The 7th Symposium on Polar Science   29 Nov 2016   National Institute of Polar Research, Japan
We have been developing a possible measurement technique for Pc1-range oscillations of ionospheric electric field with Super Dual Auroral Radar Network (SuperDARN) radars. The goal of the present study is to study spatial and temporal evolution of...
Kawano, H., A. S. Yukimatu, Y. Tanaka, S. Saita, N. Nishitani, T. Hori, and K. Iida
The 7th Symposium on Polar Science   29 Nov 2016   National Institute of Polar Research, Japan
Geomagnetic pulsations include field-line eigen-oscillations generated by the field-line resonance (FLR). Their frequencies depend on the plasma density along the field line. The FLR frequency is expected to change sharply across the plasmapause, ...
Sato, N., A. S. Yukimatu, Y. Tanaka, and T. Hori
The 7th Symposium on Polar Science   29 Nov 2016   National Institute of Polar Research, Japan
It is well known that the poleward boundary of a diffuse aurora occasionally develops large-scale wavy structures, called omega bands or torch structures, in the morning sector of the auroral oval. We examined Omega band auroras observed with the ...
Sato, N., A. S. Yukimatu, Y. Tanaka, and T. Hori
140th SGEPSS fall meeting   21 Nov 2016   SGEPSS (Society of Geomagnetism and Earth, Planetary and Space Sciences) / Kyushu Univ.
We examined statistical characteristics of Omega band auroras using the THEMIS ground-based all-sky imager ...
T. Hori, N. Nishitani, A. S. Yukimatu, T. Nagatsuma, K. Hosokawa, H. Kawano, M. Watanabe + ERG-SuperDARN共同観測検討タスクチーム
8th ERG Science meeting   15 Nov 2016   ISEE, Nagoya Univ., and RISH, Kyoto Univ.
Sato, N., A. S. Yukimatu, Y. Tanaka, and T. Hori
第3回「太陽地球環境データ解析に基づく超高層大気の空間・時間変動の解明」   19 Oct 2016   NIPR, ISEE Nagoya Univ., RISH Kyoto Univ.
Sato, N., A. S. Yukimatu, Y. Tanaka, T. Hori, T. Nagatsuma, W. Bristow
SuperDARN research meeting 2016   10 Aug 2016   NIPR, ISEE Nagoya Univ., NICT
Akira Sessai Yukimatu
SuperDARN research meeting 2016   9 Aug 2016   NIPR, ISEE Nagoya Univ., NICT
Akira Sessai Yukimatu
SuperDARN research meeting 2016   9 Aug 2016   NIPR, ISEE Nagoya Univ., NICT
Sato, N., A. Kadokura, Y. Tanaka, T. Hori, and A. S. Yukimatu
AOGS 2016 meeting (13th Asia Oceania Geosciences Society Annual Meeting)   31 Jul 2016   AOGS (Asia Oceania Geosciences Society)
We examined Omega band auroras observed with the THEMIS ground based all-sky imager network. Using 8 years data from January 2007 we found a large number of events (~ 330) that showed the processes of the generation of omega band aurora from the g...
Yukimatu, A. S.
SuperDARN Workshop 2016   31 May 2016   Geophys. Inst., Univ. of Alaska, Fairbanks
Antarctic SENSU Syowa South and East radars have been running since 1995 and 1997, respectively. Many maintenance works for conventional log-periodic antennae have been required almost every year mainly due to bent or broken elements, saddles (par...
Nishitani, N., T. Hori, A. S. Yukimatu, and T. Nagatsuma
SuperDARN Workshop 2016   30 May 2016   Geophys. Inst., Univ. of Alaska, Fairbanks
Sato, N., A. Kadokura, Y. Tanaka, T. Hori, A. S. Yukimatu
JpGU 2016 meeting   25 May 2016   JpGU
We examine morphological and statistical characteristics of Omega band auroras. In order to study statistical feature of Omega band aurora we used the THEMIS ground-based all-sky imager network data for 8 years from January 2007 to December 2014. ...
Nishitani, N., T. Hori, A. S. Yukimatu and T. Nagatsuma
JpGU 2016 meeting   23 May 2016   JpGU
Watanabe and Nishitani (Adv. Polar Sci, 2013) showed that during solar flares the SuperDARN data show positive Doppler velocities in ground / sea scatter echoes, and that this velocity change can be interpreted mainly in terms of the abnormal ioni...
Akira Sessai Yukimatu
JpGU 2016 meeting   23 May 2016   JpGU
Shiokawa K., S. Abe, R. Fujii, K. Hashimoto, K. Hosokawa, M. Ishii, A. Kadokura, H. Kawano, T. Kikuchi, K. Kitamura, Y. Miyoshi, T. Nagatsuma, N. Nishitani, Y. Obana, Y. Ogawa, H. Ohya, M. Okada, Y. Otsuka, S. Oyama, M. Ozaki, S. Saita, N. Sato, M. Shinohara, H. Tadokoro, M. Taguchi, Y. Tanaka, T. Tanimori, F. Tsuchiya, H. Yamagisi, A. Yoshikawa, A. S. Yukimatu, and K. Yumoto
ISAS Workshop: Magnetospheric Plasmas 2015   3 Dec 2015   JAAXA/ISAS
Iwaki, M., R. Kataoka, M. Watanabe, S. Fujita, A. S. Yukimatu, K. Hosokawa, T. Tanaka
6th Symposium on Polar Science   16 Nov 2015   NIPR, Japan
Ionospheric convection has been investigated in terms of interplanetary magnetic field (IMF) Bz. For northward IMF, the remnant convection is interpreted as a viscous interaction. We suggest, however, that there is another possibility of the remna...
Sato, N., A. Kadokura, Y. Tanaka, T. Hori, A. S. Yukimatu
6th Symposium on Polar Science   16 Nov 2015   NIPR, Japan
We examined omega band auroras observed with the THEMIS ground based all-sky imagers. Using 8 years data from 2007 we found a large number of events (~ 150) that showed almost whole processes of the generation of omega band aurora from the initial...
Yukimatu, A. S.
6th Symposium on Polar Science   16 Nov 2015   NIPR, Japan
SENSU Syowa HF radars are important components of SuperDARN, the international HF radars network since 1995 and have significantly contributed to understanding not only magnetosphere-ionosphere system and their couplings but also MLT region dynami...
Iwaki, M., R. Kataoka, M. Watanabe, S. Fujita, A. S. Yukimatu, K. Hosokawa, T. Tanaka
平成27年度 国立極地研究所研究集会 第299回生存圏シンポジウム 平成27年度STE現象解析ワークショップ 「第5回極端宇宙天気研究会」   11 Nov 2015   NIPR, RISH/Kyoto Univ., ISEE/Nagoya Univ.
Yukimatu, A. S.
138th SGEPSS fall meeting   2 Nov 2015   SGEPSS, Univ. of Tokyo
SENSU Syowa HF radars are important components of SuperDARN, the international HF radars network since 1995 and have significantly contributed to understanding not only magnetosphere-ionosphere system and their couplings but also MLT region dynami...
Sato, N., A. Kadokura, Y. Tanaka, T. Hori, and A. S. Yukimatu
138th SGEPSS fall meeting   1 Nov 2015   SGEPSS, Univ. of Tokyo
We examined omega band auroras observed with the THEMIS ground based all-sky imagers. Using 8 years data from 2007 we found a large number of events that showed almost whole processes of the generation of omega band aurora from the initial growth ...
Kawano, H., A. S. Yukimatu, Y. Tanaka, S. Saita, N. Nishitani, T. Hori
138th SGEPSS fall meeting   1 Nov 2015   SGEPSS, Univ. of Tokyo
In the sea/ground backscattered data obtained by the SuperDARN Hokkaido East radar, we have found a relatively short-lived (lasting for about an hour) wave event which could be classified as a different type from the typical long-lasting (several ...
北海道第二レーダー+SuperDARN全体の動向、ERG-SuperDARNタスクチームについて
Nishitani N., T. Hori, A. S. Yukimatu, T. Nagatsuma, et al,
SGEPSS Innner Magnetosphere sectional committee meeting   1 Nov 2015   SGEPSS Innner Magnetetosphere sectional committee
Tanaka, Y., Y. Ogawa, A. Kadokura, H. Miyaoka, A. S. Yukimatu, H. Yamagishi, A. Shinbori, N. Umemura, S. Abe, Y. Koyama, M. Yagi, and S. Ueno
SCOSTEP WDS Workshop - Global Data Activities for the Study of Solar-Terrestrial Variability   29 Sep 2015   NICT, Japan
The Japanese Antarctic Research Expedition (JARE) started on the occasion of the International Geophysical Year (IGY) and has performed various observations at Syowa Station and the surrounding areas. National Institute of Polar Research (NIPR) in...
Iwaki, M., R. Kataoka, M. Watanabe, S. Fujita, A. S. Yukimatu, K. Hosokawa, T. Tanaka
NIPR research meeting "「プラズマシート電離圏投影問題研究会」"   18 Sep 2015   NIPR
Yukimatu, A. S. and Co-I group members
第7回南極観測シンポジウム(7th symposium on Antarctic Observation)   17 Sep 2015   NIPR
Yukimatu, A. S.
SuperDARN research meeting   15 Sep 2015   NIPR, STEL Nagoya Univ., NICT
Sato, N., A. Kadokura, Y. Tanaka, T. Hori, A. S. Yukimatu
IUGONET research meeting   18 Aug 2015   NIPR, STEL Nagoya Univ., RISH Kyoto Univ.
Nakamura, T., K. Sato, M. Tsutsumi, T. Yamanouchi, T. Sato, Y. Tomikawa, K. Nishimura, M. K. Ejiri, M. Abo, T. Tsuda, T. Kawahara, H. Suzuki, A. Mizuno, T. Nagahama, H. Yamagishi, A. S. Yukimatu, M. Kohma, Y. Isono, T. Nishiyama, T. S. Matsuda
AOGS (Asia Oceania Geosciences Society) 2015 (12th Annual Meeting)   5 Aug 2015   AOGS (Asia Oceania Geosciences Society)
JARE (Japanese Antarctic Research Expedition) has been carrying out a six year prioritized project of the Antarctic research observations since 2010. One of the sub projects is on the precise profiling of Antarctic middle and upper atmosphere from...
Sato, N., A. S. Yukimatu, Y. Tanaka, T. Hori, A. Kadokura
SuperDARN Workshop 2015   5 Jun 2015   Univ. of Leicester, U.K.
We examined omega band auroras observed with the THEMIS ground based all-sky imagers. We could find several events that showed almost whole processes of the generation of omega band aurora from the initial growth phase to the declining phase throu...
Hori, T., Y. Miyoshi, K. Seki, Y. Miyashita, K. Keika, M. Shoji, T. Segawa, I. Shinohara, Y. Tanaka, K. Shiokawa, K. Asamura, T. Takashima, N. Nishitani, A. S. Yukimatu, and T. Nagatsuma
SuperDARN Workshop 2015   5 Jun 2015   Univ. of Leicester, U.K.
The ERG (Exploration of energization and Radiation in Geospace) is a Japanese geospace exploration project and its scientific goal is comprehensive understanding of geospace storm with a special focus on dynamical evolution of the radiation belts ...
Kawano, H., A. S. Yukimatu, Y. Tanaka, S. Saita, N. Nishitani, and T. Hori
SuperDARN Workshop 2015   2 Jun 2015   Univ. of Leicester, U.K.
In the ground/sea backscattered data obtained by the SuperDARN Hokkaido East radar, located at 36.5 (214.7) degrees in the AACGM latitude (longitude), we have found a relatively short-lived wave event which could be classified as a different type ...
Saita, S., S. Fujita, A. Kadokura, T. Tanaka, A. S. Yukimatu, Y. Tanaka, S. Ohtani, K. T. Murata, T. Higuchi
JpGU (Japan Geoscience Union) meeting 2015   28 May 2015   JpGU (Japan Geoscience Union)
The Magnetosphere-Ionosphere (M-I) boundary condition in the global MHD simulation (Tanaka, 2010) includes insufficient factors for the M-I coupling process, so that we have to calibrate the global MHD simulation model considering parametric uncer...
Kadokura, A., H. Yamagishi, M. Okada, Y. Ogawa, Y. Tanaka, T. Motoba, K. Hosokawa, S. Saita, Y. Miyoshi, A. S. Yukimatu, H. Miyaoka, R. Kataoka
JpGU (Japan Geoscience Union) 2015 meeting   28 May 2015   JpGU (Japan Geoscience Union)
Space and upper atmospheric sciences group in the National Institute of Polar Research (NIPR) are now planning to carry out a ground-based network observation project of auroral phenomena using unmanned observation system during the next term of t...
Sato., N., A. Kadokura, Y. Tanaka, T. Nishiyama, A. S. Yukimatu
JpGU (Japan Geoscience Union) 2015 meeting   27 May 2015   JpGU (Japan Geoscience Union)
Omega band auroras were observed with the THEMIS ground based All-Sky Imagers array at SNKQ in Canada at ˜0230 MLT
on 1st March 2011. We could find almost whole processes of the generation of omega band aurora from the initial growth phase
to the ...
Iwaki, M., R. Kataoka, M. Watanabe, S. Fujita, T. Tanaka, A. S. Yukimatu, K. Hosokawa, A. Grocott
JpGU (Japan Geoscience Union) 2015 meeting   26 May 2015   JpGU (Japan Geoscience Union)
It is well known that the north-south component of the interplanetary magnetic field (IMF BZ) controls the strength of ionospheric two-cell convection. When the IMF is southward, ionospheric convection exhibits the two-cell pattern that is generat...
Yukimatu, A. S.
JpGU (Japan Geoscience Union) 2015 meeting   26 May 2015   JpGU (Japan Geoscience Union)
Kadokura, A., A. S. Yukimatu, R. Kataoka, H. Miyaoka, M. Okada, Y. Ogawa, Y. Tanaka, H. Yamagishi
ERG science meeting   13 Mar 2015   RISH, Kyoto Univ., and STE Lab., Nagoya Univ., Japan
Hori, T.,Y., Miyoshi, N. Nishitani, A. S. Yukimatu, T. Nagatsuma, M. Teramoto, R. Nomura, N. Takahashi, Y. Kasaba, K. Sakaguchi, K. Shiokawa, H. Kawano, K. Hosokawa, Y. Ebihara, Y. Obana
ERG Science meeting   13 Mar 2015   RISH, Kyoto Univ., and STE Lab., Nagoya Univ., Japan
Iwaki, M., R. Kataoka, M. Watanabe, S. Fujita, T. Tanaka, A. S. Yukimatu, K. Hosokawa
United Nations / Japan Workshop on Space Weather “Science and Data Products from ISWI Instruments”   3 Mar 2015   Kyushu Univ., Japan

Research Grants & Projects

 
JSPS (Japan Society for the Promotion of Science): Grants-in-Aid for Scientific Research
Project Year: Apr 2013 - Mar 2018    Investigator(s): Akira Sessai Yukimatu
本研究では、SuperDARN 短波レーダーに、新しいイメージング観測法を導入し、飛躍的に(従来
比約1 桁の)高い空間分解能観測を実現し、近年開発の2 次元超高時間分解能観測手法と組み合わせ、
現状を打破する次世代の高時空間分解能観測を確立する。これにより、中間圏・下部熱圏(MLT)領
域の中性風速観測精度の飛躍的向上を達成すると共に、従来時間空間分解能が不十分な為に詳細な
観測研究が困難であった、電離圏FAI(沿磁力線不規則構造)の詳細や過渡的現象を含む様々な超
高層大気の諸現象を高精...
JSPS (Japan Society for the Promotion of Science): Grants-in-Aid for Scientific Research
Project Year: Apr 2009 - Mar 2014    Investigator(s): Natsuo Sato
JSPS (Japan Society for the Promotion of Science): Grants-in-Aid for Scientific Research
Project Year: Apr 2007 - Mar 2011    Investigator(s): Masaki Tsutsumi
Mainly based on radar meteor echo measurements we studied the behaviour of polar mesopause region (around 90 km altitude), especially, atmospheric gravity waves, which transport significant amount of momentum and energy in the atmosphere. Horizont...
JSPS (Japan Society for the Promotion of Science): Grants-in-Aid for Scientific Research
Project Year: Apr 2006 - Mar 2009    Investigator(s): Akira Sessai Yukimatu
Yukimatu and Tsutsumi, GRL, 2002 で開発した、SuperDARN レーダーによる高時間分解能観測・解析手法を発展させ、周波数領域干渉計(FDI)手法によるレンジ方向の高空間分解能観測をSuperDARN で初めて実現し、中間圏界面領域の高精度中性風観測に成功し、又、電離圏沿磁力線不規則構造(FAI)の生成・消滅過程に関する重要な知見を得た。更に、方位角方向の高空間分解能観測実現の為の重要な基礎データを得た。これらの新しい観測手法の実現は、電離圏・磁気圏相互作...
JSPS (Japan Society for the Promotion of Science): Grants-in-Aid for Scientific Research
Project Year: Apr 2004 - Mar 2007    Investigator(s): Akira Sessai Yukimatu, Masaki Tsutsumi
In this study we upgraded the SuperDARN time series analysis technique [Yukimatu and Tsutsumi, 2002] by adding new capabilities to improve spatial resolutions, and also developed techniques to observe new targets such as meteors and polar mesosphe...
JSPS (Japan Society for the Promotion of Science): Grants-in-Aid for Scientific Research
Project Year: Apr 2002 - Mar 2005    Investigator(s): Takehiko Aso
Through studies on polar atmospheric tide at MLT regions by EISCAT and other arctic and also Antarctic radars and modelings, it is found that altitude profiles of EISCAT, SSR and meteor radar tide are by and large contiguous or consistent in vario...
JSPS (Japan Society for the Promotion of Science): Grants-in-Aid for Scientific Research
Project Year: Apr 1999 - Mar 2003    Investigator(s): Natsuo Sato
The Super Dual Auroral Radar Network (SuperDARN) is a global-scale network for HF radars capable of sensing backscatter from ionospheric irregularities in the E and F-regions of the high-latitude ionosphere. Such HF radar network has been deployed...
JSPS (Japan Society for the Promotion of Science): Grants-in-Aid for Scientific Research
Project Year: Apr 1999 - Mar 2001    Investigator(s): Masaki Ejiri
We have developed an all-sky-imajor (ASI) which has been operative at the Amundsen-Scott South Pole Station during 1999 to 2000 austral winter seasons. The fundamental operation has been carried out from our Institute through the satellite interne...
Study on Mesosphere, Lower Thermosphere(MLT) region dynamics with SuperDARN radars
Project Year: 2001   
JSPS (Japan Society for the Promotion of Science): Grants-in-Aid for Scientific Research
Project Year: Apr 1997 - Mar 2000    Investigator(s): Kiyofumi Yumoto
本研究目的は、地磁気強度が日本付近の半分程度と異常に弱く磁場減少率が異常に大きいブラジル南部地域で、超高層や中層大気圏における諸現象の形態学的な調査を行い、将来予想される汎地球的な地球磁場減少がもたらすであろう宇宙からの高エネルギー粒子の入射量増加に伴って、どのように地球環境が変動するかについての影響評価とその予測を行うことであり、そのためにどのような共同観測調査が必要なのか等を研究することであった。

平成11年度も磁気異常帯での超高層異常現象の研究をする際、どのような観測項目をどの程度...
JSPS (Japan Society for the Promotion of Science): Grants-in-Aid for Scientific Research
Project Year: Apr 1997 - Mar 1999    Investigator(s): Masaki Ejiri
1996年に南極点基地に設置された超高感度全天イメージャ(ASI)に、昨年に引続き、1998年南半球冬期にらいても稼働する事が出来た。人工衛星を経由してのインターネットを使用し、基本的なオペレーション・コマンドの送出と、1日数枚のクイック・ルック画像の取得を行って、正常な機器の運用を行うことが出来た。但し、全データは光磁気ディスクに蓄積されているのでそのデータ回収、さらに1年毎の機器メンテナンス(感度較正、テープ装置の設置、焦点調整等)の為、1998年11月に田口をアムンセン・スコット南極...
JSPS (Japan Society for the Promotion of Science): Grants-in-Aid for Scientific Research
Project Year: Apr 1996 - Mar 1998    Investigator(s): Natsuo Sato
The Dual Aur or al Radar Network (DARN) is a global-scale network for HF radars capable of sensing backscatter from ionospheric irregularities in the E and F-regions of the high-latitude ionosphere. Such HF radar network has been deployed in Arcti...
JSPS (Japan Society for the Promotion of Science): Grants-in-Aid for Scientific Research
Project Year: Apr 1996 - Mar 1998    Investigator(s): Shoichi Okano
We improved and maintained the following instruments installed in the previous year .

San Martinho observatory (1) Gamma Ray Spectrometer (2) UVB meter (3) Riometer (f = 30.4 MHz) (4) VLF natural wave receiver (f = 0.4 - 10kHz) (5) High sensitive...
JSPS (Japan Society for the Promotion of Science): Grants-in-Aid for Scientific Research
Project Year: Apr 1995 - Mar 1997    Investigator(s): Natsuo Sato
The objective of this project is to study on the conjugate (interhemispheric) observation of auroral phenomena. Conjugate observation is very important. Charged particles generally propagate along geomagnetic field line. Therefore, it is believed ...
JSPS (Japan Society for the Promotion of Science): Grants-in-Aid for Scientific Research
Project Year: Apr 1993 - Mar 1995    Investigator(s): Hisao Yamagishi, Akira Kadokura
JSPS (Japan Society for the Promotion of Science): Grants-in-Aid for Scientific Research
Project Year: Apr 1992 - Mar 1995    Investigator(s): Natsuo Sato
Charged particles in the magnetosphere are constrained to move along magnetic field fines. Thus the similarity of auroral events in opposite hemisphere can be used to investigate the linkage of the magnetospheric field lines. After the early studi...
Study on solar wind- magnetosphere-ionosphere interaction with SuperDARN radars
Project Year: 1992   
Study on radiation belts in the magnetosphere
Project Year: 1992   

Social Contribution

 
[Editor]  Elsevier  Polar Science  Feb 2009 - Today
Published on behalf of the National Institute of Polar Research

Polar Science is an international, peer-reviewed and quarterly journal. It is dedicated to provide original research articles for sciences related to the polar regions of the Earth a...
[Organizing Member]  JSME, JSASS, IEICE, SGEPSS, ASJ, JAXA, SPSS, JSF, JRS  27th Satellite Desing Contest  1 Apr 2019 - 31 Mar 2020
[Organizing Member]  NICT, NIPR, ISEE/Nagoya-U, EUC, Kyushu-U  SuperDARN Workshop 2019  (Fujiyoshida, Yamanashi, Japan)  2 Jun 2019 - 7 Jun 2019
vice chairperson and SOC member for SuperDARN Workshop 2019
[Presenter]  NICT, NIPR, ISEE/Nagoya-U, EUC, Kyushu-U  SuperDARN Workshop 2019  (Fujiyoshida, Yamanashi, Japan)  6 Jun 2019 - 6 Jun 2019
Chair person for a science session: "Solar Effect on HF propagation"
[Presenter]  NIPR  南極観測シンポジウム2018  (NIPR, Tokyo, Japan)  31 Jul 2018
[Lecturer]  NIPR  Science Cafe  (NIPR Polar Science Museum)  22 Nov 2017 - 22 Nov 2017
[Presenter]  Institute for Space Astrophysics and Planetology (IAPS) of the National Institute for Astrophysics (INAF), Italy  SuperDARN Workshop 2017  (Town Hall Chigi-Zondadari Palace, San Quirico d'Orcia, Siena, Italy)  4 Jun 2017 - 9 Jun 2017
A chair person for a science session at the international SuperDARN Workshop 2017 held in San Quirico d'Orcia, Siena, Italy
[Presenter]  Geophys. Inst., Univ. of Alaska, Fairbanks  SuperDARN Workshop 2016  (Fairbanks, Alaska, U.S.A.)  30 May 2016 - 30 May 2016
A chair person for a session "Science session 1" at the international SuperDARN Workshop 2016 held in Fairbanks, Alaska, U.S.A.
[Organizing Member]  Nagoya Univ., NIPR, NICT  The 12th International Conference of Substorms (ICS-12)  (Ise-Shima Royal Hotel, Shima, Mie, Japan)  10 Nov 2014 - 14 Nov 2014
Over the half century since the first finding of the auroral substorm by Akasofu (1964), auroral and magnetospheric substorm has been one of the main topics for the scientists in space physics. Not only giving the spectacular auroral view, substor...
[Panelist, Planner]  AOGS (Asia Oceania Geosciences Society)  AOGS 2014 meeting (Asia Oceania Geosciences Society) 2014 meeting  (Sapporo, Hokkaido, Japan)  28 Jul 2014 - 1 Aug 2014
ST-20: Coupling of High and Mid Latitude Ionosphere and its Relation to Gespace Dynamics
Conveners: Tsutomu Nagatsuma (NICT, Japan), Nozomu Nishitani (Nagoya Univ, Japan), A. Sessai Yukimatu (NIPR, Japan), Hongqiao Hu (PRIC, China), Vladimir Kurki...
[Editor]  Springer  Springer Open Journal  2014 - 2014
Title of special issue: Coupling of the High and Mid Latitude Ionosphere and Its Relation to Geospace Dynamics Deadline for submissions: 31st December 2014 Lead Guest Editor: Nozomu Nishitani Guest Editors: Tsutomu Nagatsuma, Akira Sessai Yukimatu...
[Lecturer]  NIPR  Science Cafe  (NIPR Polar Science Museum)  21 Dec 2013 - 21 Dec 2013
[Organizing Member]  SCOSTEP, JSPS, SGEPSS, Nagoya Univ., NIPR, NICT etc  International CAWSES-II Symposium  (Nagoya Univ., Aichi, Japan)  18 Nov 2013 - 22 Nov 2013
This International CAWSES-II Symposium hosted by SCOSTEP (Scientific Committee on Solar-Terrestrial Physics) will provide an excellent opportunity to discuss the scientific accomplishments of CAWSES-II and look forward to SCOSTEP's future programs...
[Organizing Member]  NIPR  The 4th Symposium on Polar Science  (NIPR)  12 Nov 2013 - 15 Nov 2013
[Lecturer]  世田谷区教育委員会  才能の芽を育てる体験学習 南極探索教室  (NIPR)  26 Jul 2011 - 26 Jul 2011
[Lecturer]  世田谷区教育委員会  才能の芽を育てる体験学習 南極探索教室  (世田谷区立教育センター)  7 Nov 2010 - 7 Nov 2010
[Lecturer]  Nairobi Japanese School  ナイロビ日本人学校キャリア教育講義  (Nairobi Japanese School (in Kenya))  7 Jun 2010 - 7 Jun 2010
[Lecturer]  愛知県吉良町教育委員会  白瀬中尉法要談話会  (農村環境改善センター(愛知県吉良町(現西尾市)))  2 Sep 2007 - 2 Sep 2007
[TV or radio appearance]  Aomori Broadcasting Corporation (RAB)  Radio Program (5 times)  2007 - 2007
[Presenter]  IUGG  IUGG2003 (XXIII General Assembly of the International Union of Geodesy and Geophysics), Sapporo, Japan, 2003.6.30-7.11.  (Sapporo, Hokkaido, Japan)  30 Jun 2003 - 11 Jul 2003
a session chair for a session