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Study of generating mechanism of ionospheric E-region irregularities with rocket/radar simultaneous observations

Research Project

Project/Area Number 14340145
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Space and upper atmospheric physics
Research InstitutionKyoto University

Principal Investigator

FUKAO Shoichiro  KYOTO UNIVERSITY, Ration Science Center for Space and Atmosphere, Professor, 宙空電波科学研究センター, 教授 (30026249)

Co-Investigator(Kenkyū-buntansha) NAKAMURA Takuji  KYOTO UNIVERSITY, Ration Science Center for Space and Atmosphere, Associate Professor, 宙空電波科学研究センター, 助教授 (40217857)
HASHIGUCHI Hiroyuki  KYOTO UNIVERSITY, Ration Science Center for Space and Atmosphere, Associate Professor, 宙空電波科学研究センター, 助教授 (90293943)
YAMAMOTO Mamoru  KYOTO UNIVERSITY, Ration Science Center for Space and Atmosphere, Associate Professor, 宙空電波科学研究センター, 助教授 (20210560)
OTSUKA Yuichi  Nagoya University, Solar Terrestrial Energy Laboratory, Research Associate, 太陽地球環境研究所, 助手 (40314025)
SAITO Akinori  KYOTO UNIVERSITY, Faculty of Science, Research Associate, 理学研究科, 助手 (10311739)
Project Period (FY) 2002 – 2003
Project Status Completed (Fiscal Year 2003)
Budget Amount *help
¥14,400,000 (Direct Cost: ¥14,400,000)
Fiscal Year 2003: ¥3,400,000 (Direct Cost: ¥3,400,000)
Fiscal Year 2002: ¥11,000,000 (Direct Cost: ¥11,000,000)
KeywordsSEEK-2 observation / Midlatitude ionospheric E-region / Sounding rocket / Ionospheric irregularity / Rada observation
Research Abstract

Ionospheric irregularities in the mid-latitude E-region has been a study topics for more than ten years. The epoch was the discovery of the quasi-periodic (QP) structure in the E-region FAI (Field-Aligned Irregularity) echoes observed with the MU radar in Japan. The QP structures appear in the E-region FAI as a reflection of modulation pattern in the Sporadic-E (Es) layers. The structures are associated with polarization electric field, which suggests strong coupling process between the ionized and neutral atmosphere. In August 2002, we conducted SEEK-2 (Sporadic-E Experiment over Kyushu 2) campaign in Japan under collaboration with scientists from Japan, USA and Taiwan. The SEEK-2 consists of two sounding rockets of Institute of Space and Aeronautical Sciences that include in-situ experiment of electron density, electron temperature, electric field, plasma fluctuation and waves, and geomagnetic field as before. This research program is mainly dedicated to conduct the SEEK-2 ground-based observations. We operated two radars of 24.5 MHz and 31.6 MHz, ionosonde network of Japan, an MF radar, several airglow imagers, and a GPS scintillation-receiver system. We observed intense QP echoes with radars after 23 LT (= UT + 9 hours) on August 3, 2002, and launched rockets into the E-region at 2324 LT and 2339 LT. The operation of the SEEK-2 was very successful as we could, select a good event for the launches. All instruments on the rockets worked fine. We have found that the rockets detected multi-layered Es-layers at 103, 105 and 129 km altitudes, and intense electric fields that approach +-10 mV/m. In March 2003, we hosted the SEEK-2 workshop for data comparison and analysis. From this observation program we published more than 30 papers in the international journals. Numbers of oral presentations from the SEEK-2 results were 21 in international conferences, and 54 in domestic meetings.

Report

(3 results)
  • 2003 Annual Research Report   Final Research Report Summary
  • 2002 Annual Research Report
  • Research Products

    (36 results)

All Other

All Publications (36 results)

  • [Publications] Fukao, S., Y.Ozawa, T.Yokoyama 他2名: "First observations of the spatial structure of F region 3-m-scale field-aligned irregularities with the Equatorial Atmosphere Radar in Indonesia"Journal of Geophysical Research. 109・A2. A02304 (2004)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] T.Yokoyama, M.Yamamoto, S.Fukao: "Three-dimensional simulation on generation of polarization electric field in the midlatitude E-region ionosphere"Journal of Geophysical Research. 109・A1. A01309 (2004)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] K.Shiokawa, Y.Otsuka, T.Ogawa他10名: "Thermospheric wind during a storm-time large-scale traveling ionospheric disturbance"Journal of Geophysical Research. 108・A12. 1423 (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] S.Fukao, Y.Ozawa, M.Yamamoto他1名: "Altitude-Extended Equatorial Spread F Observed near Sunrise Terminator over Indonesia"Geophysical Research Letter. 30・22. 2137 (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] T.Yokoyama, M.Yamamoto, S.Fukao: "Computer simulation of polarization electric fields as a source of midlatitude field-aligned irregularities"Journal of Geophysical Research. 108・A2. 1054 (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] S.Fukao, H.Hashiguchi他7名: "The equatorial Atmosphere Radar(EAR) : System description and first results"Radio Science. 38・4. 1053 (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Y.Otsuka, T.Ogawa他5名: "Optical and Radio Measurements of a 630-nm Enhancement over Japan on September 9, 1999"Journal of Geophysical Research. 108・A6. 1252 (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Ogawa, T., O.Takahashi, Y.Otsuka 他3名: "Annual and Semiannual Variations of the Mid Latitude Ionosphere under Low Solar Activity"Journal of Geophysical Research. 107・A10. 1275 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] T.Maruyama, K.Nozaki他2名: "Ionospheric Height Changes at Two Closely Separated Equatorial Stations and Implications in Spread F Onsets"Journal of Atmospheric and Solar-Terrestrial Physics. 64. 1557-1563 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Y.Otsuka, A.Saito 他4名: "A new technique for mapping of total electron content using GPS network in Japan."Earth Planets Space. 54・1. 63-70 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] A.Saito, M.Yamamoto他6名: "Observations of traveling ionospheric disturbances and 3-mscale irregularities in the nighttime F-region ionosphere with the MU radar and a GPS network"Earth Planets Space. 54・1. 31-44 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Hysell, D.L., M.Yamamoto, S.Fukao: "Simulations of plasma clouds in the midlatitude E region ionosphere with implications for type I and type II quasiperiodic echoes"Journal of Geophysical Research. 107・A10. 1313 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Fukao, S., Y.Ozawa, T.Yokoyama etc: "First observations of the spatial structure of F region 3-m-scale field-aligned irregularities with the Equatorial Atmosphere Radar in Indonesia"Journal of Geophysical Research. 109・A2. Art No.A02304 (2004)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] T.Yokoyama, M.Yamamoto, S.Fukao: "Three-dimensional simulation on generation of polarization electric field in the midlatitude E-region ionosphere"Journal of Geophysical Research. 109・A1. Art.No.A01309 (2004)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] K.Shiokawa, Y.Otsuka, T.Ogawa etc: "Thermospheric wind during a storm -time large -scale traveling ionospheric disturbance"Journal of Geophysical Research. 108・A12. Art.No.1423 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] S.Fukao, Y.Ozawa, M.Yamamoto etc: "Altitude-Extended Equatorial Spread F Observed near Sunrise Terminator over Indonesia"Geophysical Research Letter. 30・22. Art No.2137 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] T.Yokoyama, M.Yamamoto, S.Fukao: "Computer simulation of polarization electric fields as a source of midlatitude field-aligned irregularities"Journal of Geophysical Research. 108・A2. Art No.1054 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] S.Fukao, H.Hashiguchi, etc: "The Equatorial Atmosphere Radar (EAR) : System description and first results"Radio Science. 38・4. Art No.1053 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Y.Otsuka, T.Ogawa, etc: "Optical and Radio Measurements of a 630-nm Enhancement over Japan on September 9, 1999"Journal of Geophysical Research. 108・A6. Art.No.1252 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Ogawa, T., O.Takahashi, Y.Otsuka, etc: "Annual and Semiannual Variations of the Mid Latitude Ionosphere under Low Solar Activity"Journal of Geophysical Research. 107・A10. Art.No.1275 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] T.Maruyama, K.Nozaki, etc: "Ionospheric Height Changes at Two Closely Separated Equatorial Stations and Implications in Spread F Onsets"Journal of Atmospheric and Solar-Terrestrial Physics. 64. 1557-1563 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Y.Otsuka, A.Saito, etc: "A new technique for mapping of total electron content using GPS network in Japan"Earth Planets Space. 54・1. 63-70 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] A.Saito, M.Yamamoto, etc: "Observations of traveling ionospheric disturbances and 3-mscale irregularities in the nighttime F-region ionosphere with the MU radar and a GPS network"Earth Planets Space. 54・1. 31-44 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Hysell, D.L., M.Yamamoto, S.Fukao: "Simulations of plasma clouds in the midlatitude E region ionosphere with implications for type I and type II quasiperiodic echoes"Journal of Geophysical Research. 107・A10. Art No.1313 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] T.Yokoyama, M.Yamamoto, S.Fukao: "Three-dimensional simulation on generation of polarization electric field in the midlatitude E-region ionosphere"Journal of Geophysical Research. 109・A1. A01309 (2004)

    • Related Report
      2003 Annual Research Report
  • [Publications] K.Shiokawa, Y.Otsuka, T.Ogawa他10名: "Thermospheric wind during a storm-time large-scale traveling ionospheric disturbance"Journal of Geophysical Research. 108・A12. 1423 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] T.Yokoyama, M.Yamamoto, S.Fukao: "Computer simulation of polarization electric fields as a source of midlatitude field-aligned irregularities"Journal of Geophysical Research. 108・A2. 1054 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] S.Fukao, Y.Ozawa, M.Yamamoto他1名: "Altitude-Extended Equatorial Spread F Observed near Sunrise Terminator over Indonesia"Geophysical Research Letter. 30・22. 2137 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] Y.Otsuka, T.Ogawa他5名: "Optical and Radio Measurements of a 630-nm Enhancement over Japan on September 9,1999"Journal of Geophysical Research. 108・A6. 1252 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] S.Fukao, H.Hashiguchi他7名: "The Equatorial Atmosphere Radar (EAR) : System description and first results"Radio Science. 38・4. 1053 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] S.Fukao, H.Hashiguchi 他7名: "The Equatorial Atmosphere Radar (EAR): System description and first results"Radio Science. (印刷中). (2003)

    • Related Report
      2002 Annual Research Report
  • [Publications] T.Yokoyama, M.Yamamoto 他1名: "Computer Simulation of Polarization Electric Fields as a Source of Midlatitude Field-Aligned Irregularities"Journal of Geophysical Research. 108・A2. 1054-1063 (2003)

    • Related Report
      2002 Annual Research Report
  • [Publications] S.Kawamura, S.Fukao 他2名: "Annual and Semiannual Variations of the Mid Latitude Ionosphere under Low Solar Activity"Journal of Geophysical Research. 107・A8. 1166-1176 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] T.Maruyama, K.Nozaki 他2名: "Ionospheric Height Changes at Two Closely Separated Equatorial Stations and Implications in Spread F Onsets"Journal of Atmospheric and Solar-Terrestrial Physics. 64. 1557-1563 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] Y.Otsuka, A.Saito 他4名: "A new technique for mapping of total electron content using GPS network in Japan"Earth Planets Space. 54・1. 63-70 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] A.Saito, M.Yamamoto 他6名: "Observations of traveling ionospheric disturbances and 3-mscale irregularities in the nighttime F-region ionosphere with the MU radar and a GPS network"Earth Planets Space. 54・1. 31-44 (2002)

    • Related Report
      2002 Annual Research Report

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Published: 2002-04-01   Modified: 2016-04-21  

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