Investigation of solar storm propagation processes by development of next generation phased array radio telescope

• Project/Area Number: 18H01266
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Review Section: Basic Section 17010:Space and planetary sciences-related
• Research Institution: Nagoya University
• Principal Investigator: Iwai Kazumasa 名古屋大学, 宇宙地球環境研究所, 准教授 (00725848)
• Project Period (FY): 2018-04-01 – 2022-03-31
• Project Status: Completed (Fiscal Year 2021)
• Budget Amount: ¥17,420,000 (Direct Cost: ¥13,400,000、Indirect Cost: ¥4,020,000); Fiscal Year 2021: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000); Fiscal Year 2020: ¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000); Fiscal Year 2019: ¥5,590,000 (Direct Cost: ¥4,300,000、Indirect Cost: ¥1,290,000); Fiscal Year 2018: ¥6,500,000 (Direct Cost: ¥5,000,000、Indirect Cost: ¥1,500,000)
• Keywords: 宇宙天気 / 電波観測 / 太陽風 / FPGA / フェーズドアレイ / 電波天文学

Outline of Final Research Achievements

We investigated the propagation process of CME, which can have a serious impact on the environment around the earth. We developed a digital phased array system that enables us to observe the radio scattering phenomena (so called IPS) in eight directions simultaneously. We also developed a data assimilation system that includes the IPS data into the real-time MHD simulation. We found that the developed simulation system has higher accuracy than conventional prediction models.

Academic Significance and Societal Importance of the Research Achievements

CMEは地球周辺環境に擾乱をもたらし、通信障害や大規模停電など社会的な影響の大きい宇宙天気災害の原因となる。本研究ではその観測の高精度化を可能にするとともに、そのデータを取り込んだリアルタイム予測モデルを開発することで、高精度な予測を可能とした。本研究の成果は、宇宙天気の予報精度向上を通じて、今後ますます宇宙利用が進む社会の安定に貢献する。

Research Products

• [Journal Article] Validation of coronal mass ejection arrival-time forecasts by magnetohydrodynamic simulations based on interplanetary scintillation observations (2021)
  • Author(s): Iwai Kazumasa、Shiota Daikou、Tokumaru Munetoshi、Fujiki Ken’ichi、Den Mitsue、Kubo Y?ki
  • Journal Title: Earth, Planets and Space Volume: 73 Issue: 1 Pages: 9-9
  • DOI: 10.1186/s40623-020-01345-5
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] BepiColombo Science Investigations During Cruise and Flybys at the Earth, Venus and Mercury (2021)
  • Author(s): Mangano, V., Dosa, M., Franz, M., Milillo, A., Oliveira, J. S., Lee, Y. J, Slavin, J. A., Krger, H., Maturilli, A., Cornet, T., Iwai, K., Miyoshi, Y., Lucente, M., Massetti, S., Schmidt, C. A., Dong, C., McKnna-Lawlor, S., Grassi, D., Heyner, D., Kozyrev, A. S., Peron, R.
  • Journal Title: Space Sci. Rev. Volume: 217 Issue: 1 Pages: 23-23
  • DOI: 10.1007/s11214-021-00797-9
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Presentation] Validation of CME arrival-time forecasted by MHD simulations based on interplanetary scintillation observations (2021)
  • Author(s): Iwai K., Shiota D., Tokumaru M., Fujiki K., Den M., Kubo Y.
  • Organizer: 43rd COSPAR Scientific Assembly
  • Int'l Joint Research / Invited
• [Presentation] Ground-based solar wind observation of ISEE and its possible collaboration with space instruments and simulations (2021)
  • Author(s): Kazumasa Iwai
  • Organizer: 名古屋大学宇宙地球環境研究所 共同研究集会 宇宙科学研究所 電離圏磁気圏シンポジウム「第25太陽活動周期における内部太陽圏研究の新展開」
  • Invited
• [Presentation] ISEE太陽風観測装置の次世代機の開発 (2021)
  • Author(s): 岩井 一正、徳丸 宗利、藤木 謙一
  • Organizer: ISEE合同研究集会「太陽地球環境と宇宙線モジュレーション」、「惑星間空間プラズマにおける波動現象」および太陽圏・宇宙線関連の共同研究成果報告会
• [Presentation] 次世代太陽風観測のための汎用デジタルフェーズドアレイ装置の開発 (2021)
  • Author(s): 岩井 一正
  • Organizer: 日本天文学会2021年春季年会
• [Presentation] 次世代惑星間空間シンチレーション観測用2次元フェーズドアレイ装置の開発 (2020)
  • Author(s): 岩井 一正、徳丸 宗利、藤木 謙一
  • Organizer: JpGU-AGU Joint Meeting 2020:Virtual
  • Int'l Joint Research
• [Presentation] Validation and operation of a coronal mass ejection arrival time forecasting system using interplanetary scintillation observations (2020)
  • Author(s): 岩井 一正、塩田 大幸、徳丸 宗利、藤木 謙一、田 光江、久保 勇樹
  • Organizer: JpGU-AGU Joint Meeting 2020:Virtual
  • Int'l Joint Research
• [Presentation] Spectral Structures of Type II Solar Radio Bursts and Solar Energetic Particles (2020)
  • Author(s): 岩井 一正、八代 誠司、Nitta Nariaki、久保 勇樹
  • Organizer: JpGU-AGU Joint Meeting 2020:Virtual
  • Int'l Joint Research
• [Presentation] Next generation digital phased array IPS observation system of ISEE (2020)
  • Author(s): Kazumasa Iwai
  • Organizer: Technology for Next Generation Space-Earth Environmental Radio Science
  • Int'l Joint Research / Invited
• [Presentation] 惑星間空間シンチレーション観測データを取り込んだMHDシミュレーションによる太陽嵐到来予報の精度評価 (2020)
  • Author(s): 岩井 一正、塩田大幸、久保勇樹、田光江、徳丸宗利、藤木謙一
  • Organizer: 日本天文学会2020年秋季年会
• [Presentation] Development of digital fast Fourier transform spectrometers by ADC and FPGA: OCTAD-S (2020)
  • Author(s): 岩井 一正
  • Organizer: The ALMA 2030 Vision: Design considerations for Digitizers, Backend and Data Transmission System
  • Int'l Joint Research
• [Presentation] 次世代宇宙地球系観測のための汎用デジタルフェーズドアレイ装置の開発 (2020)
  • Author(s): 岩井 一正
  • Organizer: 第148回地球電磁気・地球惑星圏学会の総会および講演会
• [Presentation] 次世代太陽風観測装置による太陽圏研究の新展開 (2020)
  • Author(s): 岩井 一正
  • Organizer: 2020年度太陽研連・太陽スペース研究シンポジウム
• [Presentation] 2020年代の内部太陽圏研究：次世代IPS観測と国際/学際連携 (2020)
  • Author(s): 岩井一正
  • Organizer: 太陽研究者連絡会シンポジウム
  • Invited
• [Presentation] 次世代太陽圏観測装置の検討と試作機の設計 (2019)
  • Author(s): 岩井一正、徳丸宗利、藤木謙一
  • Organizer: 地球電磁気・地球惑星圏学会第146回講演会
• [Presentation] Next generation heliospheric observation instrument: design of the new radio telescope for the IPS observations (2019)
  • Author(s): Kazumasa Iwai
  • Organizer: 内部太陽圏探査の新展開 ～第25太陽活動周期に向けて～
  • Int'l Joint Research
• [Presentation] Radio telescopes at 327 MHz of ISEE, Nagoya University; System and its interplanetary scintillation observations (2018)
  • Author(s): Kazumasa Iwai, Munetoshi Tokumaru, and Ken'ichi Fujiki
  • Organizer: Science at Low Frequency V (SALF V)
  • Int'l Joint Research
• [Presentation] IPS observation of ISEE (2018)
  • Author(s): Kazumasa Iwai
  • Organizer: The Workshop on Solar Radio and IPS Data Analysis
  • Int'l Joint Research