1999 Fiscal Year Annual Research Report

Super DARNレーダーと地上共役点観測による極域電磁圏の南北対称性の研究

Research Project

Project/Area Number	09044106
Research Institution	National Institute of Polar Research
Principal Investigator	佐藤夏雄国立極地研究所, 情報科学センター, 教授 (50132709)
Co-Investigator(Kenkyū-buntansha)	前田佐和子京都造形芸術大学, 教授 (00199613) 小川忠彦名古屋大学, 太陽地球環境研究所, 教授 (60271607) 藤井良一名古屋大学, 太陽地球環境研究所, 教授 (00132712) 野澤悟徳名古屋大学, 太陽地球環境研究所, 助手 (60212130) 麻生武彦国立極地研究所, 北極圏環境研究センター, 教授 (10026255)
Keywords	地磁気共役点観測 / Super DARNレーダー / EISCATレーダー / オーロラ / 極域電磁圏・熱圏 / 地磁気脈動 / サブストーム / 沿磁力線電流
Research Abstract	アイスランドにおける昭和基地とのオーロラ共役点観測は9月の秋分期に約3週間実施した。天候に恵まれ、興味深いオーロラ現象を多くとらえることができた。南極中国中山基地でのオーロラ観測に関しては、観測の継続だけでなく、6月には上海において「日中共同シンポジウム」を開催した。北極域のスバールバルでは、EISCATレーダーと地上観測との同時観測を重視して実施した。Super DARNレーダーによる特別共同観測では、Super DARNレーダーによる共役性観測や衛星同時観測のための特別モードキャンペーンを年間10回実施した。具体的な研究概要としては、アイスランドでの観測から、(a)オメガバンド脈動オーロラの発達過程とHFレーダーとの関係、(b)ブラックオーロラの発達過程、(c)サブストームの共役性、等に関する新たな観測事実が得られた。中山基地での観測から、(a)周期的変動オーロラのタイプ別けと統計解析、(b)昼間オーロラのダイナミックス、(c)イメージング・リオメータの共役性、等に関する新たな観測事実が得られた。Super DARNレーダーの特別観測から、(a)Pc3-5地磁気脈動のレーダーと衛星との周期・位相特性の比較、(b)昼間の可視オーロラとSuper DARNレーダーとの時間的・空間的変動特性、(c)夜側電離圏対流のグローバル変動、等に関する新たな観測事実が得られた。EISCATレーダーを用いた観測から、極域電離圏における(a)電離圏上部において発生するイオン流出現象、(b)電離圏下部における中性大気ダイナミクス、そして(c)沿磁力線電流の研究を進めた。

Research Products

(47 results)

All Other

All Publications (47 results)

[Publications] Sato, N., T. Nagato, and Th. Saemundsson: "Extremely periodic pulsatingaurora observed near L=6 : A new type pulsting aurora"Adv. Polar Upper Atmos. Res.. 13. 57-66 (1999)
[Publications] Sato, N., Y. Murata, H. Yamagishi, A. S. Yukimatu, M. Kikuchi, K. Makita, H. Yang, and R. Liu: "Simultaneous observation of Syowa East HF radarand Zhongshan optical aurora associated with the solar wind negative pressure impulse"Chinese Journal of Polar Science. (in press).
[Publications] Ebihara Y., S. Barabash and M. Ejiri: "On the global production rates of energetic neutral atoms (ENAs) and their association with the Dst index"Geophys. Res. Lett.. 26・19. 2929-2932 (1999)
[Publications] Braendstroem, B. U. E., T. B. Leyser, A. A. Steen, M. T. Rietveld, B. Gustavsson, T. Aso, and M. Ejiri: "Unambiguous evidence of HF pump-enhanced airglow at auroral latitudes"Geophys. Res. Lett.. 26・23. 3561-3564 (1999)
[Publications] Ogawa, Y., R. Fujii, S. C. Buchert, S. Nozawa, S. Watanabe, and A. P. vanEyken: "Simultaneous EISCAT Svalbard and VHF radar observations of ion upflows at different aspect angles"Geophys. Res. Lett.. 27・1. 81-84 (2000)
[Publications] Nozawa, S., and A. Brekke: "Studies of the auroral E-region neutral wind through a solar cycle : Quiet days"J. Geophys. Res.. 104・A1. 45-66 (1999)
[Publications] Fujii, R., S. Nozawa, S. C. Buchert, and A. Brekke: "Statistical characteristics of electromagneticenergy transfer between the magnetosphere, the ionosphere and the thermosphere"J. Geophys. Res.. 104・A2. 2357-2365 (1999)
[Publications] Lessard, M. R., M. K. Hudson, B. J. Anderson, R. L. Amoldy, H. Luhr, G. D. Reeves, N. Sato, and A. T. Weatherwax: "Evidence for a global disturbance with monochromatic pulsations and energetic electron bouncing"J. Geophys. Res.. 104・A4. 7011-7023 (1999)
[Publications] Buchert, S. C., Fujii, R., and K. -H. Glassmeier: "Ionospheric conductivity modulation in ULF pulsations"J. Geophys. Res.. 104・A5. 10119-10133 (1999)
[Publications] Yeoman, T. K., R. V. Lewis, S. E. Milan, and M. Watanabe: "An interhemispheric study of the ground magnetic and ionospheric electric fields during the substorm growth phase and expansion phase onset"J. Geophys. Res.. 104・A7. 14867-14877 (1999)
[Publications] Maeda, S., H. Fujiwara, and S. Nozawa: "Dayside neutral winds in high-latitude lower thermosphere during geomagnetically quiet summer days"J. Geophys. Res.. 104・A9. 19871-19879 (1999)
[Publications] Nishitani, N., T. Ogawa, M. Pinnock, M. Freeman, J. Dudeney, J. P. Villan, K. Baker, N. Sato, H. Yamagishi, and H. Matsumoto: "A very largescale flow bursts observed by the Super DARN radars"J. Geophys. Res.. 104・A10. 22469-22486 (1999)
[Publications] Onda K., M. Ejiri, and Y. Itikawa: "Analysis of electron auroras based on the Monte Carlo method : Application to active electron arc auroras observed by the sounding rocket at Syowa Station"J. Geophys. Res.. 104・A12. 27991-28001 (1999)
[Publications] Buchert, S. C., A. P. van Eyken, T. Ogawa, and S. Watanabe: "Naturally Enhanced Ion-Acoustic Lines Seen With the EISCAT Svalbard Radar"Adv. Space Res.. 23・10. 1699-1704 (1999)
[Publications] Ejiri, M., T. Aso, M. Okada, M. Tsutsumi, M. Taguchi, N. Sato, and S. Okano: "Japanese research project on arctic and antarctic observations of the middle atmosphere"Adv. Space Res.. 24・12. 1689-1692 (1999)
[Publications] Nozawa, S., and A. Brekke: "Seasonal variation of the auroral E-region neutral wind for different solar activities"J. Atmos. Solar-Terr. Phys.. 61. 585-605 (1999)
[Publications] Ishii, M., S. Oyama, S. Nozawa, R. Fujii, E. Sagawa, S. Watari, and H. Shinagawa: "Dynamics of neutral wind near auroral arc, Earth Planets Space"Earth Planets Space. 51. 833-844 (1999)
[Publications] Saka, O., O. Watanabe, K. Okada and D. N. Baker: "A slow mode wave as a possible source of Pi 2 and associated particle precipitation : A case study"Ann. Geophys.. 17. 674-681 (1999)
[Publications] Nishino, M., N. Gorokhov, Y. Tanaka, H. Yamagishi, and T. Hansen: "Probe experiment characterizing 30 MHz radio wave scatter in the high-latitude ionosphere"Radio Science. 34・4. 883-898 (1999)
[Publications] Ejiri, M.: "All-sky Imager at South Pole AO-117-O, 1999-2000 USAP Science Planning Summary"Antarctic Support Associates. 38-39 (1999)
[Publications] Ebihara Y., and M. Ejiri: "Quantitative ring current model : Overview and comparison with observations"Adv. Polar Upper Atmos. Res.. 12. 1-36 (1999)
[Publications] Fukumoto, M., N. Nishitani, T. Ogawa, N. Sato, H. Yamagishi and A. S. Yukimatu: "Statistical Analysis of Echo Power, Doppler Velocity and Spectral Width Obtained with the Syowa South HF Radar"Adv. Polar Upper Atmos. Res.. 13. 37-47 (1999)
[Publications] Urashima, A., T. Aso, M. Ejiri, A. A. Steen, U. Braendstroem, and B. Gustavsson: "Camera calibration by an integration sphere for the auroral tomography observation"Adv. Polar Upper Atmos. Res.. 13. 79-78 (1999)
[Publications] Nishino M., N. Nishitani, N. Sato, H. Yamagishi, M. Lester, and J. A. Holtet: "A rectified response of daytime radio wave absorption to southward and northward excurtions during northward interplanetary magnetic field : A case study"Adv. Polar Upper Atmos. Res.. 13. 139-153 (1999)
[Publications] Makita, K., and N. J. Schuch: "Geomagnetic hole"Bulettin of Science and Engineering, Takushoku Univ.. 7・2. 59-66 (1999)
[Publications] Fujii, R., S. Nozawa, S. C. Buchert, and A. Brekke: "Energy coupling between the magnetosphere, ionosphere and thermosphere"Adv. Space Res.. 25・1. 213-218 (2000)
[Publications] Saka, O., H. Akaki, G. D. Reeves and D. N. Baker: "Magnetic fields and particle signatures in the vicinity of nightside geosynchronous altitudes in the first one-minutes-interval of Pi 2 onset : a case study"J. Atmos. Solar Terr. Phys.. 62. 17-30 (2000)
[Publications] Endo, M., R. Fujii, Y. Ogawa, S. C. Buchert, S. Nozawa, S. Watanabe, and N.: "Ion outflow and inflow at the topside ionosphere observed by the EISCAT VHF radar"Ann. Geophys.. 18. 170-181 (2000)
[Publications] 巻田和男、星野光男、立原祐司、西野正徳、湯元清文: "ブラジル・トリニダード地磁気共役観測"拓殖大学理工学研究報告. 7・3. 47-53 (2000)
[Publications] 片岡弘匡: "2次元Hall-MHDシミュレーションによるオーロラに伴うエレクトロダイナミクスの研究"名古屋大学大学院理学研究科素粒子宇宙物理学専攻1999年度修士論文. (2000)
[Publications] 森瀬和宏: "EISCATレーダーとトロムソMFレーダーにより導出された中性風の比較研究"名古屋大学大学院理学研究科素粒子宇宙物理学専攻1999年度修士論文. (2000)
[Publications] Kosch, M. J., Ishii, S. Nozawa, D. Rees, K. Cierpka, A. Kohsiek, K. Schiegel, R. Fujii, T. Hagfors, T. J. Fuller-Rowell and C. Lathuilere: "A comparison of thermospheric winds and temperatures from Fabry-Perot interferometer and EISCAT radrmeasurements with models"Adv. Space Res.. (in press).
[Publications] Aso, T., A. A. Steen, U. Braendstroem, B. Gustavsson, A. Urashima, and M. Ejiri: "ALIS, a state-of-the art optical observation network for the exploration of polar atmospheric processes"Adv. Space Res.. (in press).
[Publications] Kikuchi, T., M. Pinnock, A. Rodget, H. Luehr, T. Kitamura, H. Tachihara, M. Watanabe, N. Sato, and M. Ruochoniemi: "Global evolution of a substorm-associated DP2 current system observed by Super DARN and magnetometers"Adv. Space Res.. (in press).
[Publications] Watanabe, M.: "Constitution of dayside field-aligned current systems"International Journal of Geomagnetism and Aeronomy. (in press).
[Publications] Yang, H., N. Sato, K. Makita, M. Kikuchi, A. Kadokura, M. Ayukawa, H. Q. Hu, R. Y. Liu, and I. h*gstr*: "Synoptic auroral display along the postnoon auroral oval : A surbey with all-sky TV observation at Zhongshan, Antarctica"Atmos. Terr. Phys. (in press).
[Publications] Ejiri, M., M. Okada and S. Okano: "Auroral dynamics observed by the all sky imager at South Pole Station"Antarctic Journal of the United States. (in press).
[Publications] Ayukawa, M., K. Makita, N. Sato, M. Kikuchi, H. Yang, R. Liu, and H. Hu: "Aurora morhpology in the dayside"Chinese Journal of Polar Science. (in press).
[Publications] Fukumoto, M., Nishitani, M., T. Ogawa, N. Sato, H. Yamagishi, and A. S. Yukimatu: "Statistical study of doppler velocity and echo power around 75° magnetic latitude obtaned with the Syowa East HF radr in 1997"Adv. Polar Upper Atmos. Res.. (in press).
[Publications] Hedin, M., I. Haeggstroem, A. Pellinen-Wannberg, L. Andersson, U. Braendstroem, B. Gustavsson, A. A. Steen, A. Westman, G. Wannberg, T. van Evken, T. Aso, C. Cattell, C. W. Carlosn, D. Khumoar: "3-D extent of the main ioospheric trough - a case study"Adv. Polar Upper Atmos. Res.. (in press).
[Publications] Hosokawa, K., A. S. Yukimatu, and T. Iyemori, and N. Sato: "Characteristics of Solar Effect (SFE) in the High-latitude F region ionosphere as oberved by the Super DARN"Adv. Polar Upper Atmos. Res.. (in press).
[Publications] Murata, Y., N. Sato, H. Yamagishi, A. S. Yukimatu, M. Kikuchi, K. Makita, T. Ogawa, H. Yang, R. Liu, and A. D,: "Simultaneous quasi-periodic optical and HF radar signatures observed in the postnoon sector"Adv. Polar Upper Atmos. Res.. (in press).
[Publications] Yamagishi, H., Y. Fujita, N. Sato, M. Nishino, P. Stauning, R. Liu, and Th, Saemundsson: "Interhemispheric conjugacy of auroral poleward expansion observed by conjugated imagint riometers at 〜67° and 〜77° invariant latitude"Adv. Polar Upper Atmos. Res.. (in press).
[Publications] Saka, O., T. Kitamura, H. Tachihara, M. Shinohara, N. B. Trivedi, N. Sato, J. M. Ruohoniemi, and R. A. Greenwald: "Simultaneous convection transientsin auroral zone and in equator as observed with Super DARN and equatorial matnetometers : a correlation with Equatorial counter Electrojet (CEJ) event"Adv. Polar Upper Atmos. Res.. (in press).
[Publications] Yoshida, N., S. Watanabe, H. Fukunishi, T. Sakanoi, T. Abe, T. Mukai, H. Hayakawa, A. Matsuoka, Y. Kasahara, R. Fujii, S. Nozawa, Y. Ogawa, and M. Svrissuo: "Coordinated Akebone and EISCAT observations of suprathermal ion outflows in the nightside inverted - V region"J. Atmos. Solar-Terr. Phys.. (in press).
[Publications] Nozawa, S. and A. Brekke: "A case study of the auroral E region neutral windon a quiet summer day : Comparison of three methods of the EISCAT UHF radarforderiving the E region wind"Radio Sci.. (in press).
[Publications] Nishino, M., H. Yamagishi, N. Sato, Y. Murata, L. Ruiyan, H. Honquao, P. Stauning, and J. A. Holted: "Post-noon ionospheric absorption observed by imaging riometers at polar cusp/cap conjugate stations"Chinese Journal of Polar Science. (in press).

1999 Fiscal Year Annual Research Report

Super DARNレーダーと地上共役点観測による極域電磁圏の南北対称性の研究

Principal Investigator

佐藤 夏雄 国立極地研究所, 情報科学センター, 教授 (50132709)

Research Products

[Publications] Sato, N., T. Nagato, and Th. Saemundsson: "Extremely periodic pulsatingaurora observed near L=6 : A new type pulsting aurora"Adv. Polar Upper Atmos. Res.. 13. 57-66 (1999)

[Publications] Sato, N., Y. Murata, H. Yamagishi, A. S. Yukimatu, M. Kikuchi, K. Makita, H. Yang, and R. Liu: "Simultaneous observation of Syowa East HF radarand Zhongshan optical aurora associated with the solar wind negative pressure impulse"Chinese Journal of Polar Science. (in press).

[Publications] Ebihara Y., S. Barabash and M. Ejiri: "On the global production rates of energetic neutral atoms (ENAs) and their association with the Dst index"Geophys. Res. Lett.. 26・19. 2929-2932 (1999)

[Publications] Braendstroem, B. U. E., T. B. Leyser, A. A. Steen, M. T. Rietveld, B. Gustavsson, T. Aso, and M. Ejiri: "Unambiguous evidence of HF pump-enhanced airglow at auroral latitudes"Geophys. Res. Lett.. 26・23. 3561-3564 (1999)

[Publications] Ogawa, Y., R. Fujii, S. C. Buchert, S. Nozawa, S. Watanabe, and A. P. vanEyken: "Simultaneous EISCAT Svalbard and VHF radar observations of ion upflows at different aspect angles"Geophys. Res. Lett.. 27・1. 81-84 (2000)

[Publications] Nozawa, S., and A. Brekke: "Studies of the auroral E-region neutral wind through a solar cycle : Quiet days"J. Geophys. Res.. 104・A1. 45-66 (1999)

[Publications] Fujii, R., S. Nozawa, S. C. Buchert, and A. Brekke: "Statistical characteristics of electromagneticenergy transfer between the magnetosphere, the ionosphere and the thermosphere"J. Geophys. Res.. 104・A2. 2357-2365 (1999)

[Publications] Lessard, M. R., M. K. Hudson, B. J. Anderson, R. L. Amoldy, H. Luhr, G. D. Reeves, N. Sato, and A. T. Weatherwax: "Evidence for a global disturbance with monochromatic pulsations and energetic electron bouncing"J. Geophys. Res.. 104・A4. 7011-7023 (1999)

[Publications] Buchert, S. C., Fujii, R., and K. -H. Glassmeier: "Ionospheric conductivity modulation in ULF pulsations"J. Geophys. Res.. 104・A5. 10119-10133 (1999)

[Publications] Yeoman, T. K., R. V. Lewis, S. E. Milan, and M. Watanabe: "An interhemispheric study of the ground magnetic and ionospheric electric fields during the substorm growth phase and expansion phase onset"J. Geophys. Res.. 104・A7. 14867-14877 (1999)

[Publications] Maeda, S., H. Fujiwara, and S. Nozawa: "Dayside neutral winds in high-latitude lower thermosphere during geomagnetically quiet summer days"J. Geophys. Res.. 104・A9. 19871-19879 (1999)

[Publications] Nishitani, N., T. Ogawa, M. Pinnock, M. Freeman, J. Dudeney, J. P. Villan, K. Baker, N. Sato, H. Yamagishi, and H. Matsumoto: "A very largescale flow bursts observed by the Super DARN radars"J. Geophys. Res.. 104・A10. 22469-22486 (1999)

[Publications] Onda K., M. Ejiri, and Y. Itikawa: "Analysis of electron auroras based on the Monte Carlo method : Application to active electron arc auroras observed by the sounding rocket at Syowa Station"J. Geophys. Res.. 104・A12. 27991-28001 (1999)

[Publications] Buchert, S. C., A. P. van Eyken, T. Ogawa, and S. Watanabe: "Naturally Enhanced Ion-Acoustic Lines Seen With the EISCAT Svalbard Radar"Adv. Space Res.. 23・10. 1699-1704 (1999)

[Publications] Ejiri, M., T. Aso, M. Okada, M. Tsutsumi, M. Taguchi, N. Sato, and S. Okano: "Japanese research project on arctic and antarctic observations of the middle atmosphere"Adv. Space Res.. 24・12. 1689-1692 (1999)

[Publications] Nozawa, S., and A. Brekke: "Seasonal variation of the auroral E-region neutral wind for different solar activities"J. Atmos. Solar-Terr. Phys.. 61. 585-605 (1999)

[Publications] Ishii, M., S. Oyama, S. Nozawa, R. Fujii, E. Sagawa, S. Watari, and H. Shinagawa: "Dynamics of neutral wind near auroral arc, Earth Planets Space"Earth Planets Space. 51. 833-844 (1999)

[Publications] Saka, O., O. Watanabe, K. Okada and D. N. Baker: "A slow mode wave as a possible source of Pi 2 and associated particle precipitation : A case study"Ann. Geophys.. 17. 674-681 (1999)

[Publications] Nishino, M., N. Gorokhov, Y. Tanaka, H. Yamagishi, and T. Hansen: "Probe experiment characterizing 30 MHz radio wave scatter in the high-latitude ionosphere"Radio Science. 34・4. 883-898 (1999)

[Publications] Ejiri, M.: "All-sky Imager at South Pole AO-117-O, 1999-2000 USAP Science Planning Summary"Antarctic Support Associates. 38-39 (1999)

[Publications] Ebihara Y., and M. Ejiri: "Quantitative ring current model : Overview and comparison with observations"Adv. Polar Upper Atmos. Res.. 12. 1-36 (1999)

[Publications] Fukumoto, M., N. Nishitani, T. Ogawa, N. Sato, H. Yamagishi and A. S. Yukimatu: "Statistical Analysis of Echo Power, Doppler Velocity and Spectral Width Obtained with the Syowa South HF Radar"Adv. Polar Upper Atmos. Res.. 13. 37-47 (1999)

[Publications] Urashima, A., T. Aso, M. Ejiri, A. A. Steen, U. Braendstroem, and B. Gustavsson: "Camera calibration by an integration sphere for the auroral tomography observation"Adv. Polar Upper Atmos. Res.. 13. 79-78 (1999)

[Publications] Nishino M., N. Nishitani, N. Sato, H. Yamagishi, M. Lester, and J. A. Holtet: "A rectified response of daytime radio wave absorption to southward and northward excurtions during northward interplanetary magnetic field : A case study"Adv. Polar Upper Atmos. Res.. 13. 139-153 (1999)

[Publications] Makita, K., and N. J. Schuch: "Geomagnetic hole"Bulettin of Science and Engineering, Takushoku Univ.. 7・2. 59-66 (1999)

[Publications] Fujii, R., S. Nozawa, S. C. Buchert, and A. Brekke: "Energy coupling between the magnetosphere, ionosphere and thermosphere"Adv. Space Res.. 25・1. 213-218 (2000)

[Publications] Saka, O., H. Akaki, G. D. Reeves and D. N. Baker: "Magnetic fields and particle signatures in the vicinity of nightside geosynchronous altitudes in the first one-minutes-interval of Pi 2 onset : a case study"J. Atmos. Solar Terr. Phys.. 62. 17-30 (2000)

[Publications] Endo, M., R. Fujii, Y. Ogawa, S. C. Buchert, S. Nozawa, S. Watanabe, and N.: "Ion outflow and inflow at the topside ionosphere observed by the EISCAT VHF radar"Ann. Geophys.. 18. 170-181 (2000)

[Publications] 巻田和男、星野光男、立原祐司、西野正徳、湯元清文: "ブラジル・トリニダード地磁気共役観測"拓殖大学理工学研究報告. 7・3. 47-53 (2000)

[Publications] 片岡弘匡: "2次元Hall-MHDシミュレーションによるオーロラに伴うエレクトロダイナミクスの研究"名古屋大学大学院理学研究科素粒子宇宙物理学専攻1999年度修士論文. (2000)

[Publications] 森瀬和宏: "EISCATレーダーとトロムソMFレーダーにより導出された中性風の比較研究"名古屋大学大学院理学研究科素粒子宇宙物理学専攻1999年度修士論文. (2000)

[Publications] Aso, T., A. A. Steen, U. Braendstroem, B. Gustavsson, A. Urashima, and M. Ejiri: "ALIS, a state-of-the art optical observation network for the exploration of polar atmospheric processes"Adv. Space Res.. (in press).

[Publications] Kikuchi, T., M. Pinnock, A. Rodget, H. Luehr, T. Kitamura, H. Tachihara, M. Watanabe, N. Sato, and M. Ruochoniemi: "Global evolution of a substorm-associated DP2 current system observed by Super DARN and magnetometers"Adv. Space Res.. (in press).

[Publications] Watanabe, M.: "Constitution of dayside field-aligned current systems"International Journal of Geomagnetism and Aeronomy. (in press).

[Publications] Yang, H., N. Sato, K. Makita, M. Kikuchi, A. Kadokura, M. Ayukawa, H. Q. Hu, R. Y. Liu, and I. h*gstr*: "Synoptic auroral display along the postnoon auroral oval : A surbey with all-sky TV observation at Zhongshan, Antarctica"Atmos. Terr. Phys. (in press).

[Publications] Ejiri, M., M. Okada and S. Okano: "Auroral dynamics observed by the all sky imager at South Pole Station"Antarctic Journal of the United States. (in press).

[Publications] Ayukawa, M., K. Makita, N. Sato, M. Kikuchi, H. Yang, R. Liu, and H. Hu: "Aurora morhpology in the dayside"Chinese Journal of Polar Science. (in press).

[Publications] Fukumoto, M., Nishitani, M., T. Ogawa, N. Sato, H. Yamagishi, and A. S. Yukimatu: "Statistical study of doppler velocity and echo power around 75° magnetic latitude obtaned with the Syowa East HF radr in 1997"Adv. Polar Upper Atmos. Res.. (in press).

[Publications] Hosokawa, K., A. S. Yukimatu, and T. Iyemori, and N. Sato: "Characteristics of Solar Effect (SFE) in the High-latitude F region ionosphere as oberved by the Super DARN"Adv. Polar Upper Atmos. Res.. (in press).

[Publications] Murata, Y., N. Sato, H. Yamagishi, A. S. Yukimatu, M. Kikuchi, K. Makita, T. Ogawa, H. Yang, R. Liu, and A. D,: "Simultaneous quasi-periodic optical and HF radar signatures observed in the postnoon sector"Adv. Polar Upper Atmos. Res.. (in press).

[Publications] Yamagishi, H., Y. Fujita, N. Sato, M. Nishino, P. Stauning, R. Liu, and Th, Saemundsson: "Interhemispheric conjugacy of auroral poleward expansion observed by conjugated imagint riometers at 〜67° and 〜77° invariant latitude"Adv. Polar Upper Atmos. Res.. (in press).

[Publications] Nozawa, S. and A. Brekke: "A case study of the auroral E region neutral windon a quiet summer day : Comparison of three methods of the EISCAT UHF radarforderiving the E region wind"Radio Sci.. (in press).

[Publications] Nishino, M., H. Yamagishi, N. Sato, Y. Murata, L. Ruiyan, H. Honquao, P. Stauning, and J. A. Holted: "Post-noon ionospheric absorption observed by imaging riometers at polar cusp/cap conjugate stations"Chinese Journal of Polar Science. (in press).

佐藤夏雄国立極地研究所, 情報科学センター, 教授 (50132709)

[Publications] Yang, H., N. Sato, K. Makita, M. Kikuchi, A. Kadokura, M. Ayukawa, H. Q. Hu, R. Y. Liu, and I. hgstr: "Synoptic auroral display along the postnoon auroral oval : A surbey with all-sky TV observation at Zhongshan, Antarctica"Atmos. Terr. Phys. (in press).