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International study of equatorial ionosphere based on observations and models

Research Project

Project/Area Number 20H00197
Research Category

Grant-in-Aid for Scientific Research (A)

Allocation TypeSingle-year Grants
Section一般
Review Section Medium-sized Section 17:Earth and planetary science and related fields
Research InstitutionKyoto University

Principal Investigator

山本 衛  京都大学, 生存圏研究所, 教授 (20210560)

Co-Investigator(Kenkyū-buntansha) 横山 竜宏  京都大学, 生存圏研究所, 准教授 (30397525)
橋口 浩之  京都大学, 生存圏研究所, 教授 (90293943)
齊藤 昭則  京都大学, 理学研究科, 准教授 (10311739)
大塚 雄一  名古屋大学, 宇宙地球環境研究所, 准教授 (40314025)
Liu Huixin  九州大学, 理学研究院, 教授 (70589639)
三好 勉信  九州大学, 理学研究院, 教授 (20243884)
齋藤 享  国立研究開発法人海上・港湾・航空技術研究所, 電子航法研究所, 上席研究員 (40392716)
HOZUMI KORNYANAT  国立研究開発法人情報通信研究機構, 電磁波研究所電磁波伝搬研究センター, 招聘専・協力研・特別研 (10856082)
Project Period (FY) 2020-04-01 – 2025-03-31
Project Status Granted (Fiscal Year 2024)
Budget Amount *help
¥45,240,000 (Direct Cost: ¥34,800,000、Indirect Cost: ¥10,440,000)
Fiscal Year 2024: ¥7,670,000 (Direct Cost: ¥5,900,000、Indirect Cost: ¥1,770,000)
Fiscal Year 2023: ¥7,670,000 (Direct Cost: ¥5,900,000、Indirect Cost: ¥1,770,000)
Fiscal Year 2022: ¥8,060,000 (Direct Cost: ¥6,200,000、Indirect Cost: ¥1,860,000)
Fiscal Year 2021: ¥7,670,000 (Direct Cost: ¥5,900,000、Indirect Cost: ¥1,770,000)
Fiscal Year 2020: ¥14,170,000 (Direct Cost: ¥10,900,000、Indirect Cost: ¥3,270,000)
Keywords赤道プラズマバブル / レーダー観測 / GPS-TEC観測 / 衛星データ解析 / 全地球大気モデル / GNSS-TEC観測
Outline of Research at the Start

強い不安定現象である赤道プラズマバブル(Equatorial PlasmaBubble; EPB)の国際共同研究を実施する。EPB活動度が日々変動する原因として有力なLarge-Scale Wave Structure (LSWS)仮説がある。その検証を目指して、赤道大気レーダーと観測網SEALIONによる連続観測を継続、GNSS (衛星測位)受信機を増強する。地表から電離圏までの全大気計算モデルGAIA、EPBの生成・成長を正確に模擬する非線形計算モデルを活用した研究を推進する。地上観測、衛星観測、シミュレーションを駆使した総合研究に取り組むもので、世界をリードする成果が期待される。

Outline of Annual Research Achievements

電離圏に現れる不安定現象である赤道プラズマバブル(Equatorial Plasma Bubble; EPB)の国際共同研究を実施する。EPB活動度の日々変動原因の検証を目指して、赤道大気レーダー(EAR)等による連続観測を継続、衛星-地上ビーコン観測を複数点で実施する。全大気計算モデルGAIA、EPBの生成・成長を正確に模擬する非線形計算モデルを活用した研究を推進する。課題1:EPB発生と下層から伝搬する大気波動の関連の解明、課題2:EPBの発生時の時間・空間構造の解明、課題3:長期観測に基づくEPB長期変動の解明、課題4:EPB発生予測の開発と社会貢献。
令和4年度は新型コロナ感染症からの回復により年度半ばには海外渡航が可能となった。停止しているEARについて年度後半に現地で回復を試みたが成功に至らなかった。一方で既存のデータ解析等による研究は進んだ。課題1に関しスポラディックE層生成と熱圏風の解析、GAIAモデルからの熱圏風とCO2の関連の解明、トンガ海底火山噴火に伴う全地球的な電離圏変動の研究などが行われた。課題2に関し既存の観測データ解析から、電離圏擾乱と大気の関連の研究、特殊なEPBの発生に関する報告等が行われた。課題3に関し大気風速とEPBの関連の研究、EAR観測に基づく150kmエコーの統計解析、深層学習を用いた電離圏波動の解析等が行われた。課題4に関し夕刻時のEPB発生予測手法の提案、スポラディックE層から生じる電波の長距離伝搬が航空航法無線に与える影響の評価等が示された。
2022年9月に赤道電離圏の国際研究集会が京都で開催され、本研究関連の研究動向の情報収集と議論を行った。追加課題として実施した観測ロケットS-520-32号機観測は、2022年8月11日に打上げが行われ独自開発した2周波ビーコン装置による電離圏の空間構造の観測に成功した。

Current Status of Research Progress
Current Status of Research Progress

2: Research has progressed on the whole more than it was originally planned.

Reason

令和4年(2022年)は新型コロナ感染症の問題からの回復に伴い、EARの復旧に向けた取り組みを行ったが成功には至らなかった。そのため、研究を令和5年度に延期実施することを申し出て認められた。手持ちの観測データやシミュレーションによる研究の進捗は著しく、本報告書においても多数の論文発表や学会発表を示すことができた。

Strategy for Future Research Activity

令和5年度(2023年)には東南アジア地域への渡航が本格的に再開された。EARの復旧には別経費で調達されるレーダー制御器の設置が必要なため、その準備を進め、必要となる機能維持部品の購入を進めた。その他の観測整備として、各地に衛星ビーコン電波の受信機の増強を目指すため、受信機とアンテナの改良を目指した開発研究を実施した。令和6年度(2024年)中には観測を再開させる予定を組んでおり、実施して行く。

Report

(4 results)
  • 2022 Annual Research Report
  • 2021 Annual Research Report
  • 2020 Comments on the Screening Results   Annual Research Report
  • Research Products

    (212 results)

All 2024 2023 2022 2021 2020 Other

All Int'l Joint Research (13 results) Journal Article (97 results) (of which Int'l Joint Research: 78 results,  Peer Reviewed: 96 results,  Open Access: 95 results) Presentation (101 results) (of which Int'l Joint Research: 52 results,  Invited: 17 results) Funded Workshop (1 results)

  • [Int'l Joint Research] National Research and Innovation Agency(インドネシア)

    • Related Report
      2022 Annual Research Report
  • [Int'l Joint Research] National Research and Innovation Agency(インドネシア)

    • Related Report
      2021 Annual Research Report
  • [Int'l Joint Research] KMITL(タイ)

    • Related Report
      2021 Annual Research Report
  • [Int'l Joint Research] Ho Chi Minh City Institute of Physics(ベトナム)

    • Related Report
      2021 Annual Research Report
  • [Int'l Joint Research] 中国科学院地質及地球物理研究所(中国)

    • Related Report
      2021 Annual Research Report
  • [Int'l Joint Research] SRI International(米国)

    • Related Report
      2021 Annual Research Report
  • [Int'l Joint Research]

    • Related Report
      2021 Annual Research Report
  • [Int'l Joint Research] National Research and Innovation Agency(インドネシア)

    • Related Report
      2020 Annual Research Report
  • [Int'l Joint Research] KMITL(タイ)

    • Related Report
      2020 Annual Research Report
  • [Int'l Joint Research] Ho Chi Minh City Institute of Physics(ベトナム)

    • Related Report
      2020 Annual Research Report
  • [Int'l Joint Research] 中国科学院地質及地球物理研究所(中国)

    • Related Report
      2020 Annual Research Report
  • [Int'l Joint Research] SRI International(米国)

    • Related Report
      2020 Annual Research Report
  • [Int'l Joint Research]

    • Related Report
      2020 Annual Research Report
  • [Journal Article] Investigation of the Occurrence Characteristics and Possible Origins of Daytime Spread F Irregularities in Low Latitude Region2024

    • Author(s)
      Wei, L., C. Jiang, T. Yokoyama, J. Liu, G. Yang, and Y. Hu
    • Journal Title

      J. Geophys. Res. Space Physics

      Volume: 129 Issue: 1

    • DOI

      10.1029/2023ja031809

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Evaluation of the empirical scaling factor of Joule heating rates in TIE-GCM with EISCAT measurements.2024

    • Author(s)
      Florian Gunzkofer, Huixin Liu, Gunter Stober, Dimitry Pokhotelov, and Claudia Borries
    • Journal Title

      Earth and Space Science

      Volume: 11 Issue: 4 Pages: 1-10

    • DOI

      10.1029/2023ea003447

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Ground Facility Error Analysis and GBAS Performance Evaluation Around Suvarnabhumi Airport, Thailand2024

    • Author(s)
      Budtho Jirapoom、Supnithi Pornchai、Siansawasdi Nattapong、Saito Susumu、Saekow Apitep、Myint Lin M. M.
    • Journal Title

      IEEE Transactions on Aerospace and Electronic Systems

      Volume: 60 Issue: 1 Pages: 537-547

    • DOI

      10.1109/taes.2023.3326134

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Local mitigation of higher-order ionospheric effects in DFMC SBAS and system performance evaluation2024

    • Author(s)
      Sophan Somkit、Supnithi Pornchai、Myint Lin M. M.、Saito Susumu、Hozumi Kornyanat、Nishioka Michi
    • Journal Title

      GPS Solutions

      Volume: 28 Issue: 2

    • DOI

      10.1007/s10291-024-01614-w

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Statistical Analysis of Global and Regional Ionospheric Total Electron Content (TEC) Using Extreme Value Distributions2024

    • Author(s)
      Emmela Suneetha、Ratnam D. Venkata、Otsuka Yuichi、Shinbori Atsuki、Sori Takuya、Nishioka Michi、Perwitasari Septi
    • Journal Title

      IEEE Transactions on Geoscience and Remote Sensing

      Volume: 62 Pages: 1-8

    • DOI

      10.1109/tgrs.2023.3338513

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Performance of the double-thin-shell approach for studying nighttime medium-scale traveling ionospheric disturbances using two dense GNSS observation networks in Japan2024

    • Author(s)
      Fu Weizheng、Otsuka Yuichi、Shinbori Atsuki、Nishioka Michi、Perwitasari Septi
    • Journal Title

      Earth, Planets and Space

      Volume: 76 Issue: 1

    • DOI

      10.1186/s40623-023-01956-8

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Simultaneous equatorial plasma bubble observation using amplitude scintillations from GNSS and LEO satellites in low-latitude region2023

    • Author(s)
      Seechai Khanitin、Myint Lin Min Min、Hozumi Kornyanat、Nishioka Michi、Saito Susumu、Yamamoto Mamoru、Supnithi Pornchai
    • Journal Title

      Earth, Planets and Space

      Volume: 75 Issue: 1

    • DOI

      10.1186/s40623-023-01877-6

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Modeling of Multi-Ion Plasma Bubbles in the Equatorial Ionosphere2023

    • Author(s)
      Jiang, C., L. Wei, T. Yokoyama, R. Tian, T. Liu, and G. Yang
    • Journal Title

      J. Geophys. Res. Space Physics

      Volume: 128 Issue: 10

    • DOI

      10.1029/2023ja031753

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] A three-dimensional stochastic structure model derived from high-resolution isolated equatorial plasma bubble simulations2023

    • Author(s)
      Rino, C., T. Yokoyama, and C. Carrano
    • Journal Title

      Earth, Planets and Space

      Volume: 75 Issue: 1 Pages: 64-64

    • DOI

      10.1186/s40623-023-01823-6

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Nighttime Midlatitude E-F Coupling in Geomagnetic Conjugate Ionospheres: A Double Thin Shell Model and a Multi-Source Data Investigation2023

    • Author(s)
      Fu, W., T. Yokoyama, N. Ssessanga, G, Ma, and M. Yamamoto
    • Journal Title

      J. Geophys. Res. Space Physics

      Volume: 123 Issue: 3

    • DOI

      10.1029/2022ja031074

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Effect of the seed perturbation amplitude on the equatorial spread F initiation during solar minimum2023

    • Author(s)
      Afolayan AO、Mandeep JS、Abdullah M、S A Hamid N、Yokoyama T
    • Journal Title

      Advances in Space Research

      Volume: 71 Issue: 1 Pages: 255-267

    • DOI

      10.1016/j.asr.2022.09.035

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Upward propagation of gravity waves and ionospheric perturbations triggered by the 2022 Hunga-Tonga volcanic eruption2023

    • Author(s)
      Miyoshi Yasunobu、Shinagawa Hiroyuki
    • Journal Title

      Earth, Planets and Space

      Volume: 75 Issue: 1 Pages: 68-68

    • DOI

      10.1186/s40623-023-01827-2

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Monthly Climatologies of Zonal‐Mean and Tidal Winds in the Thermosphere as Observed by ICON/MIGHTI During April 2020-March 20222023

    • Author(s)
      Yamazaki Y.、Harding B. J.、Qiu L.、Stolle C.、Siddiqui T. A.、Miyoshi Y.、Englert C. R.、England S. L.
    • Journal Title

      Earth and Space Science

      Volume: 10 Issue: 6

    • DOI

      10.1029/2023ea002962

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Long-term studies of the summer wind in the mesosphere and lower thermosphere at middle and high latitudes over Europe2023

    • Author(s)
      Juliana Jaen, Toralf Renkwitz, Huixin Liu, Christoph Jacobi, Robin Wing, Ales Kuchar, Masaki Tsutsumi, Njal Gulbrandsen, and Jorge L. Chau
    • Journal Title

      Atmospheric Chemistry and Physics

      Volume: 23 Issue: 23 Pages: 14871-14887

    • DOI

      10.5194/acp-23-14871-2023

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Low Altitude Tailing Es (LATTE): Analysis of Sporadic‐E Layer Height at Different Latitudes of Middle and Low Region2023

    • Author(s)
      Tang Qiong、Zhou Chen、Liu Huixin、Liu Yi、Zhao Jiaqi、Yu Zhibin、Hu Lianhuan、Zhao Zhengyu、Feng Xueshang
    • Journal Title

      Space Weather

      Volume: 21 Issue: 4 Pages: 1-10

    • DOI

      10.1029/2022sw003323

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Day-to-day variability of the equatorial ionosphere in Asian sector during August?October 20192023

    • Author(s)
      Liu Huixin、Otsuka Yuichi、Hozumi Kornyanat、Yu Tao
    • Journal Title

      Frontiers in Astronomy and Space Sciences

      Volume: 10 Pages: 1-10

    • DOI

      10.3389/fspas.2023.1198739

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Solved and unsolved riddles about low-latitude daytime valley region plasma waves and 150-km echoes2023

    • Author(s)
      Chau J. L.、Longley W. J.、Reyes P. M.、Pedatella N. M.、Otsuka Y.、Stolle C.、Liu H.、England S. L.、Vierinen J. P.、Milla M. A.、Hysell D. L.、Oppenheim M. M.、Patra A.、Lehmacher G.、Kudeki E.
    • Journal Title

      Frontiers in Astronomy and Space Sciences

      Volume: 10 Pages: 1-10

    • DOI

      10.3389/fspas.2023.1091319

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Intriguing Aspects of Polar-to-Tropical Mesospheric Teleconnections during the 2018 SSW: A Meteor Radar Network Study2023

    • Author(s)
      Eswaraiah Sunkara、Seo Kyong-Hwan、Kumar Kondapalli Niranjan、Koval Andrey V.、Ratnam Madineni Venkat、Mengist Chalachew Kindie、Chalapathi Gasti Venkata、Liu Huixin、Kwak Young-Sil、Merzlyakov Eugeny、Jacobi Christoph、Kim Yong-Ha、Rao Sarangam Vijaya Bhaskara、Mitchell Nicholas J.
    • Journal Title

      Atmosphere

      Volume: 14 Issue: 8 Pages: 1302-1302

    • DOI

      10.3390/atmos14081302

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Horizontal structure of convergent wind shear associated with sporadic E layers over East Asia2023

    • Author(s)
      10.Qiu, L. H., Lu, X., Yu, T., Yamazaki, Y., Huixin Liu, Sun, Y.-Y., Wu, H. N., Zuo, X. M., Yan, X. X., Yu, Y., and Qi, Y. F..
    • Journal Title

      Earth and Planetary Physics

      Volume: 7 Issue: 5 Pages: 548-557

    • DOI

      10.26464/epp2023071

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Numerical Simulations of Metallic Ion Density Perturbations in Sporadic E Layers Caused by Gravity Waves2023

    • Author(s)
      Qiu Lihui、Yamazaki Yosuke、Yu Tao、Becker Erich、Miyoshi Yasunobu、Qi Yifan、Siddiqui Tarique A.、Stolle Claudia、Feng Wuhu、Plane John M. C.、Liang Yu、Liu Huixin
    • Journal Title

      Earth and Space Science

      Volume: 10 Issue: 8 Pages: 1-10

    • DOI

      10.1029/2023ea003030

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Impact of Tropospheric Ozone Modulation Due To El Nino on Tides in the MLT2023

    • Author(s)
      Kogure Masaru、Liu Huixin、Jin Hidekatsu
    • Journal Title

      Geophysical Research Letters

      Volume: 50 Issue: 6 Pages: 1-15

    • DOI

      10.1029/2023gl102790

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Influence of Mesospheric Gravity Wave Drag on the Formation of Winter Helium Bulge in the Thermosphere2023

    • Author(s)
      Ren Dexin、Lei Jiuhou、Liu Han‐Li、Wang Wenbin、Yue Jia、Liu Huixin
    • Journal Title

      Journal of Geophysical Research: Space Physics

      Volume: 128 Issue: 2 Pages: 1-10

    • DOI

      10.1029/2022ja031022

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Simulation of horizontal sporadic E layer movement driven by atmospheric tides2023

    • Author(s)
      Andoh Satoshi、Saito Akinori、Shinagawa Hiroyuki
    • Journal Title

      Earth, Planets and Space

      Volume: 75 Issue: 1

    • DOI

      10.1186/s40623-023-01837-0

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] E‐Field Effects on Day‐To‐Day Variations of Geomagnetic Mid‐Latitude Sporadic E Layers2023

    • Author(s)
      Andoh Satoshi、Saito Akinori、Shinagawa Hiroyuki
    • Journal Title

      Journal of Geophysical Research: Space Physics

      Volume: 128 Issue: 7

    • DOI

      10.1029/2022ja031167

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Anomalous Long‐Distance Propagation of ILS LOC Signals by the Es Layer and Its Impact on Aviation Receivers2023

    • Author(s)
      Saito S.、Hosokawa K.、Sakai J.、Tomizawa I.
    • Journal Title

      Space Weather

      Volume: 21 Issue: 11

    • DOI

      10.1029/2023sw003577

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Responses of the African-European equatorial-, low-, mid-, and high-latitude ionosphere to geomagnetic storms of 2013, 2015 St Patrick’s Days, 1 June 2013, and 7 October 20152023

    • Author(s)
      Akala A.O.、Afolabi R.O.、Otsuka Y.
    • Journal Title

      Advances in Space Research

      Volume: 72 Issue: 3 Pages: 775-789

    • DOI

      10.1016/j.asr.2022.10.029

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Statistical analysis for EUV dynamic spectra and their impact on the ionosphere during solar flares2023

    • Author(s)
      Nishimoto Shohei、Watanabe Kyoko、Jin Hidekatsu、Kawai Toshiki、Imada Shinsuke、Kawate Tomoko、Otsuka Yuichi、Shinbori Atsuki、Tsugawa Takuya、Nishioka Michi
    • Journal Title

      Earth, Planets and Space

      Volume: 75 Issue: 1 Pages: 30-30

    • DOI

      10.1186/s40623-023-01788-6

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Generation of equatorial plasma bubble after the 2022 Tonga volcanic eruption2023

    • Author(s)
      A. Shinbori, T. Sori, Y. Otsuka, M. Nishioka, S. Perwitasari, T. T. Tsuda, A. Kumamoto, F. Tsuchiya, S. Matsuda, Y. Kasahara, A. Matsuoka, S. Nakamura, Y. Miyoshi, I. Shinohara
    • Journal Title

      Sci. Rep.

      Volume: 13(1)6450

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] First detection of midlatitude plasma bubble by SuperDARN during a geomagnetic storm on May 27 and 28, 20172023

    • Author(s)
      Sori, T., Shinbori, A., Otsuka, Y., Nishioka, M., Perwitasari, S., & Nishitani, N
    • Journal Title

      Journal of Geophysical Research: Space Physics

      Volume: 128 Issue: 4

    • DOI

      10.1029/2022ja031157

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] New aspects of the upper atmospheric disturbances caused by the explosive eruption of the 2022 Hunga Tong-Hunga Ha’apai volcano2023

    • Author(s)
      A. Shinbori, Y. Otsuka, T. Sori, M. Nishioka, S. Perwitasari, T. T. Tsuda, N. Nishitani, A. Kumamoto, F. Tsuchiya, S. Matsuda, Y. Kasahara, A. Matsuoka, S. Nakamura, Y. Miyoshi, I. Shinohara
    • Journal Title

      Earth Planets Space

      Volume: 75 Issue: 1 Pages: 175-175

    • DOI

      10.1186/s40623-023-01930-4

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Machine learning approach for ionospheric scintillation prediction on ROTI parameter over the African region during solar cycle 242023

    • Author(s)
      Tete Stephen、Otsuka Yuichi、Zahra Waheed K.、Mahrous Ayman
    • Journal Title

      Advances in Space Research

      Volume: - Issue: 12 Pages: 6325-6342

    • DOI

      10.1016/j.asr.2023.12.026

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Equinoctial asymmetry of plasma bubble occurrence and electric field at evening: GPS and ionosonde measurements in Southeast Asia2023

    • Author(s)
      Otsuka, Y., Abadi, P., Hozumi, K., and Almahi, A.
    • Journal Title

      Journal of Atmospheric and Solar-Terrestrial Physics

      Volume: 252 Pages: 106136-106136

    • DOI

      10.1016/j.jastp.2023.106136

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Assessing the potential of ionosonde for forecasting post-sunset equatorial spread F: an observational experiment in Southeast Asia2023

    • Author(s)
      Prayitno Abadi, Umar Ali Ahmad, Yuichi Otsuka, Punyawi Jamjareegulgarn, Alif Almahi, Septi Perwitasari, Slamet Supriadi, Wendi Harjupa & Reza Rendian Septiawan
    • Journal Title

      Earth, Planets and Space

      Volume: 75 Issue: 1

    • DOI

      10.1186/s40623-023-01941-1

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Equatorial plasma bubble intensities across longitudinal sectors of the globe using GNSS observations2023

    • Author(s)
      Okoh Daniel、Shiokawa Kazuo、Otsuka Yuichi、Rabiu Babatunde、Habarulema John Bosco、Migoya-Orue Yenca、Cesaroni Claudio
    • Journal Title

      Journal of Atmospheric and Solar-Terrestrial Physics

      Volume: 249 Pages: 106097-106097

    • DOI

      10.1016/j.jastp.2023.106097

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Periodic oscillations of Doppler frequency excited by the traveling ionospheric disturbances associated with the Tonga eruption in 20222023

    • Author(s)
      Nakata, H., Hosokawa, K., Saito, S., Otsuka, Y., Tomizawa, I.
    • Journal Title

      Earth Planets Space

      Volume: 75 Issue: 1 Pages: 158-158

    • DOI

      10.1186/s40623-023-01914-4

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Solar and geomagnetic activity dependence of 150-km echoes observed by the Equatorial Atmosphere Radar in Indonesia2022

    • Author(s)
      Yokoyama Tatsuhiro、Takagi Rieko、Yamamoto Mamoru
    • Journal Title

      Earth, Planets and Space

      Volume: 74 Issue: 1

    • DOI

      10.1186/s40623-022-01675-6

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Fast Ionogram Observations of Ascending Thin Layers Locally Transported from the E to F Region at Equatorial and Low Latitudes2022

    • Author(s)
      Hu Lianhuan、Li Guozhu、Ding Zonghua、Sun Wenjie、Zhao Xiukuan、Xie Haiyong、Zhu Zhengping、Yokoyama Tatsuhiro、Lan Jiaping、Huang Zhaoguo、Ning Baiqi
    • Journal Title

      Remote Sensing

      Volume: 14 Issue: 22 Pages: 5811-5811

    • DOI

      10.3390/rs14225811

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Statistical Analysis of Medium‐Scale Traveling Ionospheric Disturbances Over Japan Based on Deep Learning Instance Segmentation2022

    • Author(s)
      Liu Peng、Yokoyama Tatsuhiro、Fu Weizheng、Yamamoto Mamoru
    • Journal Title

      Space Weather

      Volume: 20 Issue: 7

    • DOI

      10.1029/2022sw003151

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] On using a double-thin-shell approach and TEC perturbation component to sound night-time mid-latitude E?F coupling2022

    • Author(s)
      Fu Weizheng、Yokoyama Tatsuhiro、Ssessanga Nicholas、Yamamoto Mamoru、Liu Peng
    • Journal Title

      Earth, Planets and Space

      Volume: 74 Issue: 1

    • DOI

      10.1186/s40623-022-01639-w

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Upwelling Coherent Backscatter Plumes Observed with Ionosondes in Low-Latitude Region2022

    • Author(s)
      Jiang Chunhua、Wei Lehui、Yokoyama Tatsuhiro、Xu Jiyao、Wu Kun、Yuan Wei、Liu Jing、Liu Tongxin、Yang Guobin、Zhao Zhengyu
    • Journal Title

      Journal of Space Weather and Space Climate

      Volume: 12 Pages: 13-13

    • DOI

      10.1051/swsc/2022010

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Comparison of the tidal signatures in sporadic E and vertical ion convergence rate, using FORMOSAT-3/COSMIC radio occultation observations and GAIA model2022

    • Author(s)
      Sobhkhiz-Miandehi Sahar、Yamazaki Yosuke、Arras Christina、Miyoshi Yasunobu、Shinagawa Hiroyuki
    • Journal Title

      Earth, Planets and Space

      Volume: 74 Issue: 1 Pages: 88-88

    • DOI

      10.1186/s40623-022-01637-y

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] 6-day oscillation in the thermosphere and ionosphere during the 2019 SSW event2022

    • Author(s)
      Y. Miyoshi and Y. Yamazaki
    • Journal Title

      16th International Symposium on Equatorial Aeronomy

      Volume: 15 Pages: 12-16

    • Related Report
      2022 Annual Research Report
    • Open Access
  • [Journal Article] Ionosphere-thermosphere interaction2022

    • Author(s)
      Huixin Liu, S. England
    • Journal Title

      Cross-scale coupling and energy transfer in the magnetosphere-ionosphere-thermosphere system

      Volume: 1 Pages: 441-546

    • DOI

      10.1016/b978-0-12-821366-7.00003-2

    • ISBN
      9780128213667
    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Mechanisms for Zonal Mean Wind Responses in the Thermosphere to Doubled CO2 Concentration2022

    • Author(s)
      Kogure Masaru、Liu Huixin、Tao Chihiro
    • Journal Title

      Journal of Geophysical Research: Space Physics

      Volume: 127 Issue: 9 Pages: 1-14

    • DOI

      10.1029/2022ja030643

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Altitude Extension of the NCAR‐TIEGCM (TIEGCM‐X) and Evaluation2022

    • Author(s)
      Cai Yihui、Yue Xinan、Wang Wenbin、Zhang Shun‐Rong、Liu Huixin、Lin Dong、Wu Haonan、Yue Jia、Bruinsma Sean L.、Ding Feng、Ren Zhipeng、Liu Libo
    • Journal Title

      Space Weather

      Volume: 20 Issue: 11

    • DOI

      10.1029/2022sw003227

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Global Structure and Seasonal Variations of the Tidal Amplitude in Sporadic‐E Layer2022

    • Author(s)
      Tang Qiong、Zhou Chen、Liu Huixin、Du Zhitao、Liu Yi、Zhao Jiaqi、Yu Zhibin、Zhao Zhengyu、Feng Xueshang
    • Journal Title

      Journal of Geophysical Research: Space Physics

      Volume: 127 Issue: 10

    • DOI

      10.1029/2022ja030711

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Determining the Origin of Tidal Oscillations in the Ionospheric Transition Region With EISCAT Radar and Global Simulation Data2022

    • Author(s)
      GUenzkofer F.、Pokhotelov D.、Stober G.、Liu H.、Liu H.‐L.、Mitchell N. J.、Tjulin A.、Borries C.
    • Journal Title

      Journal of Geophysical Research: Space Physics

      Volume: 127 Issue: 10

    • DOI

      10.1029/2022ja030861

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Contribution of the lower atmosphere to the day-to-day variation of thermospheric density2022

    • Author(s)
      Yue Jia、Yu Wandi、Pedatella Nick、Bruinsma Sean、Wang Ningchao、Liu Huixin
    • Journal Title

      Advances in Space Research

      Volume: 72 Issue: 12 Pages: 5460-5475

    • DOI

      10.1016/j.asr.2022.06.011

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Ionospheric Topside Diffusive Flux and the Formation of Summer Nighttime Ionospheric Electron Density Enhancement Over Millstone Hill2022

    • Author(s)
      Cai Yihui、Yue Xinan、Wang Wenbin、Zhang Shun‐Rong、Liu Huixin、Lei Jiuhou、Ren Zhipeng、Chen Yiding、Ding Feng、Ren Dexin
    • Journal Title

      Geophysical Research Letters

      Volume: 49 Issue: 4

    • DOI

      10.1029/2021gl097651

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Thermospheric Density Perturbations Produced by Traveling Atmospheric Disturbances During August 2005 Storm2022

    • Author(s)
      Pham K. H.、Zhang B.、Sorathia K.、Dang T.、Wang W.、Merkin V.、Liu H.、Lin D.、Wiltberger M.、Lei J.、Bao S.、Garretson J.、Toffoletto F.、Michael A.、Lyon J.
    • Journal Title

      Journal of Geophysical Research: Space Physics

      Volume: 127 Issue: 2

    • DOI

      10.1029/2021ja030071

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Propagation characteristics of sporadic E and medium-scale traveling ionospheric disturbances (MSTIDs): statistics using HF Doppler and GPS-TEC data in Japan2022

    • Author(s)
      Matsushima Ryo、Hosokawa Keisuke、Sakai Jun、Otsuka Yuichi、Ejiri Mitsumu K.、Nishioka Michi、Tsugawa Takuya
    • Journal Title

      Earth, Planets and Space

      Volume: 74 Issue: 1

    • DOI

      10.1186/s40623-022-01616-3

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] A study of equatorial plasma bubble structure using VHF radar and GNSS scintillations over the low-latitude regions2022

    • Author(s)
      Bumrungkit Acharaporn、Supnithi Pornchai、Saito Susumu、Myint Lin Min Min
    • Journal Title

      GPS Solutions

      Volume: 26 Issue: 4

    • DOI

      10.1007/s10291-022-01321-4

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Construction of nominal ionospheric gradient using satellite pair based on GNSS CORS observation in Indonesia2022

    • Author(s)
      Supriadi Slamet、Abidin Hasanuddin Zainal、Wijaya Dudy Darmawan、Abadi Prayitno、Saito Susumu、Prabowo Dwiko Unggul
    • Journal Title

      Earth, Planets and Space

      Volume: 74 Issue: 1

    • DOI

      10.1186/s40623-022-01633-2

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Ionospheric disturbances observed over Japan following the eruption of Hunga Tonga-Hunga Ha’apai on 15 January 20222022

    • Author(s)
      Saito Susumu
    • Journal Title

      Earth, Planets and Space

      Volume: 74 Issue: 1

    • DOI

      10.1186/s40623-022-01619-0

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Ionospheric responses on the 21 August 2017 solar eclipse by using three-dimensional GNSS tomography2022

    • Author(s)
      Chen C. H.、Lin Charles C. H.、Lee C. J.、Liu J. Y.、Saito A.
    • Journal Title

      Earth, Planets and Space

      Volume: 74 Issue: 1

    • DOI

      10.1186/s40623-022-01734-y

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Amplitude enhancement of short period GPS-TEC oscillations over rainfall area2022

    • Author(s)
      Toshihiko Iyemori, Akiyasu Yamada, Tadashi Aoyama, Kornyanat Hozumi, Yoshihiro Yokoyama, Yoko Odagi, Yasuharu Sano, Vijak Pangsapa, Thanawat Jarupongsakul, Akinori Saito and Masato Iguchi
    • Journal Title

      Earth, Planets and Space

      Volume: 74 Issue: 1

    • DOI

      10.1186/s40623-022-01604-7

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Numerical Simulations on Day‐to‐Day Variations of Low‐Latitude Es Layers at Arecibo2022

    • Author(s)
      Andoh Satoshi、Saito Akinori、Shinagawa Hiroyuki
    • Journal Title

      Geophysical Research Letters

      Volume: 49 Issue: 7

    • DOI

      10.1029/2021gl097473

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Analysis of local geomagnetic index under the influence of equatorial electrojet (EEJ) at the equatorial Phuket geomagnetic station in Thailand2022

    • Author(s)
      Myint Lin M.M.、Hozumi Kornyanat、Saito Susumu、Supnithi Pornchai
    • Journal Title

      Advances in Space Research

      Volume: 70 Issue: 5 Pages: 1429-1440

    • DOI

      10.1016/j.asr.2022.06.024

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Performance improvement of the GAGAN satellite-based augmentation system based on local ionospheric delay estimation in Thailand2022

    • Author(s)
      Sophan Somkit、Myint Lin M. M.、Saito Susumu、Supnithi Pornchai
    • Journal Title

      GPS Solutions

      Volume: 26 Issue: 4

    • DOI

      10.1007/s10291-022-01293-5

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Generation Mechanisms of Plasma Density Irregularity in the Equatorial Ionosphere During a Geomagnetic Storm on 21-22 December 20142022

    • Author(s)
      Sori T.、Shinbori A.、Otsuka Y.、Tsugawa T.、Nishioka M.、Yoshikawa A.
    • Journal Title

      Journal of Geophysical Research: Space Physics

      Volume: 127 Issue: 5

    • DOI

      10.1029/2021ja030240

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] A confirmation of vertical acoustic resonance and field-aligned current generation just after the 2022 Hunga Tonga Hunga Ha'apai volcanic eruption2022

    • Author(s)
      Toshihiko Iyemori, Michi Nishioka, Yuichi Otsuka and Atsuki Shinbori
    • Journal Title

      Earth, Planets and Space

      Volume: 74:103 Issue: 1

    • DOI

      10.1186/s40623-022-01653-y

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Electromagnetic conjugacy of ionospheric disturbances after the 2022 Hunga Tonga-Hunga Ha’apai volcanic eruption as seen in GNSS-TEC and SuperDARN Hokkaido pair of radars observations2022

    • Author(s)
      Shinbori, A., Y. Otsuka, T. Sori, M. Nishioka, S. Perwitasari, T. Tsuda, and N. Nishitani
    • Journal Title

      Earth, Planets Space

      Volume: 74 Issue: 1 Pages: 106-106

    • DOI

      10.1186/s40623-022-01665-8

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Detecting Equatorial Plasma Bubbles on All-Sky Imager Images Using Convolutional Neural Network2022

    • Author(s)
      Srisamoodkham Worachai、Shiokawa Kazuo、Otsuka Yuichi、Ansari Kutubuddin、Jamjareegulgarn Punyawi
    • Journal Title

      Lecture Notes in Networks and Systems, Springer

      Volume: 461 Pages: 481-487

    • DOI

      10.1007/978-981-19-2130-8_38

    • ISBN
      9789811921292, 9789811921308
    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Modeling Post-Sunset Equatorial Spread-F Occurrence as a Function of Evening Upward Plasma Drift Using Logistic Regression, Deduced from Ionosondes in Southeast Asia2022

    • Author(s)
      Abadi Prayitno、Ahmad Umar Ali、Otsuka Yuichi、Jamjareegulgarn Punyawi、Martiningrum Dyah Rahayu、Faturahman Agri、Perwitasari Septi、Saputra Randy Erfa、Septiawan Reza Rendian
    • Journal Title

      Remote Sensing

      Volume: 14 Issue: 8 Pages: 1896-1896

    • DOI

      10.3390/rs14081896

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] High‐Resolution 3‐D Imaging of Daytime Sporadic‐E Over Japan by Using GNSS TEC and Ionosondes2021

    • Author(s)
      Fu Weizheng、Ssessanga Nicholas、Yokoyama Tatsuhiro、Yamamoto Mamoru
    • Journal Title

      Space Weather

      Volume: 19 Issue: 12

    • DOI

      10.1029/2021sw002878

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Coupled investigations of ionosphere variations over European and Japanese regions: observations, comparative analysis, and validation of models and facilities2021

    • Author(s)
      Panasenko Sergii V.、Kotov Dmytro V.、Otsuka Yuichi、Yamamoto Mamoru、Hashiguchi Hiroyuki、Richards Philip G.、Truhlik Vladimir、Bogomaz Oleksandr V.、Shulha Maryna O.、Zhivolup Taras G.、Domnin Igor F.
    • Journal Title

      Progress in Earth and Planetary Science

      Volume: 8 Issue: 1

    • DOI

      10.1186/s40645-021-00441-8

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Propagation Mechanism of Medium Wave Broadcasting Waves Observed by the Arase Satellite: Hectometric Line Spectra2021

    • Author(s)
      Hashimoto Kozo、Shinbori Atsuki、Otsuka Yuichi、Tsuchiya Fuminori、Kumamoto Atsushi、Kasahara Yoshiya、Matsuoka Ayako、Nagano Isamu、Miyoshi Yoshizumi、Yokoyama Tatsuhiro
    • Journal Title

      Journal of Geophysical Research: Space Physics

      Volume: 126 Issue: 11

    • DOI

      10.1029/2021ja029813

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Assessing the performance of a Northeast Asia Japan-centered 3-D ionosphere specification technique during the 2015 St. Patrick’s Day geomagnetic storm2021

    • Author(s)
      Ssessanga Nicholas, Yamamoto Mamoru, Saito Susumu
    • Journal Title

      Earth Planets and Space

      Volume: 73 Issue: 1

    • DOI

      10.1186/s40623-021-01447-8

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Complementing regional ground GNSS-STEC computerized ionospheric tomography (CIT) with ionosonde data assimilation2021

    • Author(s)
      Ssessanga Nicholas, Yamamoto Mamoru, Saito Susumu, Saito Akinori, Nishioka Michi
    • Journal Title

      GPS Solutions

      Volume: 25 Issue: 3

    • DOI

      10.1007/s10291-021-01133-y

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Anomalous Increase in the Occurrence of Post‐Midnight FAI Radar Echoes in September 2019 and Its Relation With the Austral Sudden Stratospheric Warming2021

    • Author(s)
      Meenakshi S.、Sridharan S.、Solomon Ivan J.、Hozumi K.、Yatini C. Y.、Yokoyama T.、Hashiguchi H.
    • Journal Title

      Journal of Geophysical Research: Space Physics

      Volume: 126 Issue: 6

    • DOI

      10.1029/2020ja028902

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] On the Generation of an Unseasonal EPB Over South East Asia2021

    • Author(s)
      Currie J. L.、Carter B. A.、Retterer J.、Dao T.、Pradipta R.、Caton R.、Groves K.、Otsuka Y.、Yokoyama T.、Hozumi K.、Le Truong T.、Terkildsen M.
    • Journal Title

      Journal of Geophysical Research: Space Physics

      Volume: 126 Issue: 2

    • DOI

      10.1029/2020ja028724

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Plasma depletions lasting into daytime during the recovery phase of a geomagnetic storm in May 2017: Analysis and simulation of GPS total electron content observations2021

    • Author(s)
      Otsuka, Y., A. Shinbori, T. Sori, T. Tsugawa, M. Nishioka, and J. D. Huba
    • Journal Title

      Earth Planet. Phys.

      Volume: 5 Issue: 5 Pages: 1-8

    • DOI

      10.26464/epp2021046

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Multi-instrument study of longitudinal wave structures for plasma bubble seeding in the equatorial ionosphere2021

    • Author(s)
      Takahashi H.、P.、A. O. B. Figueiredo C.、M. Wrasse C.、Barros D.、A. Abdu M.、Otsuka Y.、Shiokawa K.、Li GuoZhu、Institute for Space-Earth Environmental Research, Nagoya University, Nagoya, Japan、Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China
    • Journal Title

      Earth and Planetary Physics

      Volume: 5 Issue: 5 Pages: 1-10

    • DOI

      10.26464/epp2021047

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Roles of thermospheric neutral wind and equatorial electrojet in pre-reversal enhancement, deduced from observations in Southeast Asia2021

    • Author(s)
      Abadi P.、Otsuka Y.、Liu HuiXin、Hozumi K.、R. Martinigrum D.、Jamjareegulgarn P.、Truong Thanh Le、Otadoy R.
    • Journal Title

      Earth and Planetary Physics

      Volume: 5 Issue: 5 Pages: 388-397

    • DOI

      10.26464/epp2021049

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] L‐Band Synthetic Aperture Radar Observation of Ionospheric Density Irregularities at Equatorial Plasma Depletion Region2021

    • Author(s)
      Sato Hiroatsu、Kim Jun Su、Otsuka Yuichi、Wrasse Cristiano Max、Rodrigues de Paula Eurico、Rodrigues de Souza Jonas
    • Journal Title

      Geophysical Research Letters

      Volume: 48 Issue: 16

    • DOI

      10.1029/2021gl093541

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] An experimental investigation into the possible connections between the zonal neutral wind speeds and equatorial plasma bubble drift velocities over the African equatorial region2021

    • Author(s)
      Okoh D.I.、Rabiu A.B.、Shiokawa K.、Otsuka Y.、Wu Q.、Seemala G.K.、Katamzi-Joseph Z.T.
    • Journal Title

      Journal of Atmospheric and Solar-Terrestrial Physics

      Volume: 220 Pages: 105663-105663

    • DOI

      10.1016/j.jastp.2021.105663

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Occurrence feature of plasma bubbles in the equatorial to midlatitude ionosphere during geomagnetic storms using long-term GNSS-TEC data2021

    • Author(s)
      Sori, T., A. Shinbori, Y. Otsuka, T. Tsugawa, and M. Nishioka
    • Journal Title

      J. Geophys. Res.

      Volume: 126 Issue: 5

    • DOI

      10.1029/2020ja029010

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Influence of Zonal Wind Velocity Variation on Equatorial Plasma Bubble Occurrences Over Southeast Asia2021

    • Author(s)
      Sarudin I.、Hamid N. S. A、Abdullah M.、Buhari S. M、Shiokawa K.、Otsuka Y.、Hozumi K.、Jamjareegulgarn P.
    • Journal Title

      Journal of Geophysical Research: Space Physics

      Volume: 126 Issue: 5

    • DOI

      10.1029/2020ja028994

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Examining the Wind Shear Theory of Sporadic E With ICON/MIGHTI Winds and COSMIC‐2 Radio Occultation Data2021

    • Author(s)
      Yamazaki Y.、Arras C.、Andoh S.、Miyoshi Y.、Shinagawa H.、Harding B. J.、Englert C. R.、Immel T. J.、Sobhkhiz‐Miandehi S.、Stolle C.
    • Journal Title

      Geophysical Research Letters

      Volume: 49 Issue: 1

    • DOI

      10.1029/2021gl096202

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Characterization of ionospheric irregularities over Vietnam and adjacent region for the 2008-2018 period2021

    • Author(s)
      Nguyen Thanh Dung、Le Huy Minh、Amory-Mazaudier Christine、Fleury Rolland、Saito Susumu、Nguyen Chien Thang、Pham Thi Thu Hong、Le Truong Thanh、Nguyen Thi Mai
    • Journal Title

      Vietnam Journal of Earth Sciences

      Volume: 43

    • DOI

      10.15625/2615-9783/16502

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Geomagnetic Activity Effects on CO 2 ‐Driven Trend in the Thermosphere and Ionosphere: Ideal Model Experiments With GAIA2021

    • Author(s)
      Liu Huixin、Tao Chihiro、Jin Hidekatsu、Abe Takamichi
    • Journal Title

      Journal of Geophysical Research: Space Physics

      Volume: 126 Issue: 1

    • DOI

      10.1029/2020ja028607

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Day‐to‐Day Variability of the Thermosphere and Ionosphere2021

    • Author(s)
      Liu Huixin、Yamazaki Yosuke、Lei Jiuhou
    • Journal Title

      Space Physics and Aeronomy Collection Volume 4

      Volume: 261 Pages: 275-300

    • DOI

      10.1002/9781119815631.ch15

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] DW1 Tidal Enhancements in the Equatorial MLT During 2015 El Ni?o: The Relative Role of Tidal Heating and Propagation2021

    • Author(s)
      Kogure Masaru、Liu Huixin
    • Journal Title

      Journal of Geophysical Research: Space Physics

      Volume: 126 Issue: 7

    • DOI

      10.1029/2021ja029342

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] The Possible Role of Turbopause on Sporadic‐E Layer Formation at Middle and Low Latitudes2021

    • Author(s)
      Tang Qiong、Zhou Chen、Liu Huixin、Liu Yi、Zhao Jiaqi、Yu Zhibin、Zhao Zhengyu、Feng Xueshang
    • Journal Title

      Space Weather

      Volume: 19 Issue: 12

    • DOI

      10.1029/2021sw002883

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Ionospheric Signatures of Secondary Waves From Quasi‐6‐Day Wave and Tide Interactions2021

    • Author(s)
      Yamazaki Y.、Miyoshi Y.
    • Journal Title

      Journal of Geophysical Research: Space Physics

      Volume: 126 Issue: 4

    • DOI

      10.1029/2020ja028360

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Numerical prediction of sporadic E layer occurrence using GAIA2021

    • Author(s)
      Shinagawa Hiroyuki、Tao Chihiro、Jin Hidekatsu、Miyoshi Yasunobu、Fujiwara Hitoshi
    • Journal Title

      Earth, Planets and Space

      Volume: 73 Issue: 1 Pages: 28-28

    • DOI

      10.1186/s40623-020-01330-y

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] On the Seeding of Periodic Equatorial Plasma Bubbles by Gravity Waves Associated With Tropical Cyclone: A Case Study2020

    • Author(s)
      Ajith K. K.、Li Guozhu、Tulasi Ram S.、Yamamoto M.、Hozumi K.、Abadi Prayitno、Xie Haiyong
    • Journal Title

      Journal of Geophysical Research: Space Physics

      Volume: vol.125-10 Issue: 10

    • DOI

      10.1029/2020ja028003

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Daytime Dynamo Electrodynamics With Spiral Currents Driven by Strong Winds Revealed by Vapor Trails and Sounding Rocket Probes2020

    • Author(s)
      Pfaff R.、Larsen M.、Abe T.、Habu H.、Clemmons J.、Freudenreich H.、Rowland D.、Bullett T.、Yamamoto M.‐Y.、Watanabe S.、Kakinami Y.、Yokoyama T.、Mabie J.、Klenzing J.、Bishop R.、Walterscheid R.、Yamamoto M.、Yamazaki Y.、Murphy N.、Angelopoulos V.
    • Journal Title

      Geophysical Research Letters

      Volume: 47 Issue: 15 Pages: 1-9

    • DOI

      10.1029/2020gl088803

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Evaluation of EAR Spaced Antenna Performance Using Multiple Receiving Antennas Orientations2020

    • Author(s)
      N. A. M. Aris, H. Hashiguchi, and M. Yamamoto
    • Journal Title

      Radio Science

      Volume: 55 Issue: 6

    • DOI

      10.1029/2019rs007049

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Wavenumber Spectra of Atmospheric Gravity Waves and Medium‐Scale Traveling Ionospheric Disturbances Based on More Than 10‐Year Airglow Images in Japan, Russia, and Canada2020

    • Author(s)
      Satoshi Tsuchiya、Kazuo Shiokawa、Yuichi Otsuka、Takuji Nakamura、Mamoru Yamamoto、Martin Connors、Ian Schofield、Boris Shevtsov、Igor Poddelsky
    • Journal Title

      Journal of Geophysical Research: Space Physics

      Volume: 125 Issue: 3

    • DOI

      10.1029/2019ja026807

    • NAID

      120006884943

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Equatorial plasma bubble occurrence under propagation of MSTID and MLT gravity waves2020

    • Author(s)
      Takahashi, H., C. M. Wrasse, C. A. O. B. Figueiredo, D. Barros, I. Paulino, P. Essien, M. A. Abdu, Y. Otsuka and K. Shiokawa
    • Journal Title

      J. Geophys. Res.

      Volume: 125 Issue: 9

    • DOI

      10.1029/2019ja027566

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Day-to-day variation of pre-reversal enhancement in the equatorial ionosphere based on GAIA model simulations2020

    • Author(s)
      Ghosh Priyanka、Otsuka Yuichi、Mani Sivakandan、Shinagawa Hiroyuki
    • Journal Title

      Earth, Planets and Space

      Volume: 72 Issue: 1 Pages: 93-93

    • DOI

      10.1186/s40623-020-01228-9

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Challenges to Equatorial Plasma Bubble and Ionospheric Scintillation Short-Term Forecasting and Future Aspects in East and Southeast Asia2020

    • Author(s)
      Li Guozhu、Ning Baiqi、Otsuka Yuichi、Abdu Mangalathayil Ali、Abadi Prayitno、Liu Zhizhao、Spogli Luca、Wan Weixing
    • Journal Title

      Surveys in Geophysics

      Volume: 42 Issue: 1 Pages: 201-238

    • DOI

      10.1007/s10712-020-09613-5

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Excitation Mechanism of Ionospheric 6‐Day Oscillation During the 2019 September Sudden Stratospheric Warming Event2020

    • Author(s)
      Miyoshi Yasunobu、Yamazaki Yosuke
    • Journal Title

      Journal of Geophysical Research: Space Physics

      Volume: 125 Issue: 9

    • DOI

      10.1029/2020ja028283

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Single-Frequency Time-Step Ionospheric Delay Gradient Estimation at Low-Latitude Stations2020

    • Author(s)
      Budtho Jirapoom、Supnithi Pornchai、Saito Susumu
    • Journal Title

      IEEE Access

      Volume: 8 Pages: 201516-201526

    • DOI

      10.1109/access.2020.3035247

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Circulation and Tides in a Cooler Upper Atmosphere: Dynamical Effects of CO 2 Doubling2020

    • Author(s)
      Liu Huixin、Tao Chihiro、Jin Hidekatsu、Nakamoto Yusuke
    • Journal Title

      Geophysical Research Letters

      Volume: 47 Issue: 10

    • DOI

      10.1029/2020gl087413

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Dipolar elementary current systems for ionospheric current reconstruction at low and middle latitudes2020

    • Author(s)
      Vanham?ki Heikki、Maute Astrid、Alken Patrick、Liu Huixin
    • Journal Title

      Earth, Planets and Space

      Volume: 72 Issue: 1 Pages: 1-15

    • DOI

      10.1186/s40623-020-01284-1

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] 国内稠密GNSS受信機網データを用いた中規模伝搬性電離擾乱およびその測位への影響に関する研究2024

    • Author(s)
      大塚雄一、横山竜宏、山本衛、Fu Weizheng
    • Organizer
      第515回生存圏シンポジウム 生存圏ミッションシンポジウム
    • Related Report
      2022 Annual Research Report
  • [Presentation] 信楽イオノゾンデ観測を用いた機械学習によるスポラディックE層の自動検出と統計解析2023

    • Author(s)
      横山 竜宏, 采山 裕紀, 劉 鵬, 山本 衛
    • Organizer
      日本地球惑星科学連合2023年大会
    • Related Report
      2022 Annual Research Report
  • [Presentation] MUレーダーと赤道大気レーダーによる電離圏観測2023

    • Author(s)
      横山 竜宏
    • Organizer
      第490回生存圏シンポジウム 生存圏ミッションシンポジウム
    • Related Report
      2022 Annual Research Report
  • [Presentation] 赤道MUレーダー計画の現状20232023

    • Author(s)
      山本衛・橋口浩之・横山竜宏・津田敏隆
    • Organizer
      日本地球惑星科学連合2023年大会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Incoherent Scatter Observations by the MU Radar over Japan: Potential Contribution to the IRI Model2023

    • Author(s)
      Yokoyama, T., M. Yamamoto, and Y. Otsuka
    • Organizer
      XXXVth International Union of Radio Science General Assembly and Scientific Symposium
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Multi-Scale Simulation of Equatorial Plasma Bubbles with GAIA Model2023

    • Author(s)
      Yokoyama, T., H. Jin, and H. Shinagawa
    • Organizer
      XXXVth International Union of Radio Science General Assembly and Scientific Symposium
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Solar and Geomagnetic Activity Dependence of 150-km Echoes Observed by the Equatorial Atmosphere Radar in Indonesia2023

    • Author(s)
      Yokoyama, T., R. Takagi, and M. Yamamoto
    • Organizer
      Asia Oceania Geosciences Society 20th Annual Meeting
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Automatic scaling of foF2 and foEs from ionograms obtained at Shigaraki MU Observatory2023

    • Author(s)
      Yokoyama, T., Y. Uneyama, P. Liu, and M. Yamamoto
    • Organizer
      Asia Oceania Geosciences Society 20th Annual Meeting
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 信楽イオノゾンデ観測を用いた機械学習によるスポラディックE層の自動検出と統計解析2023

    • Author(s)
      横山竜宏・采山裕紀・劉鵬・山本衛
    • Organizer
      日本地球惑星科学連合2023年大会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 深層学習再帰型ニューラルネットワークを用いた地球電離圏全電子数マップの時空間系列予測2023

    • Author(s)
      劉鵬・横山竜宏・山本衛
    • Organizer
      日本地球惑星科学連合2023年大会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 超高層大気分野研究の将来計画における観測ロケット実験2023

    • Author(s)
      齊藤昭則・阿部琢美・横山竜宏・西山尚典・高橋透・坂崎貴俊
    • Organizer
      第5回観測ロケットシンポジウム
    • Related Report
      2022 Annual Research Report
  • [Presentation] Es層形成過程の中性大気とプラズマ大気の同時観測による解明: S-310-46 号機プロジェクト2023

    • Author(s)
      齊藤昭則・阿部琢美・松岡彩子・石坂圭吾・齊藤義文・田川雅人・熊本篤志・横田久美子・小嶋浩嗣・栗田怜・村田直史・斎藤享・高橋透・西岡未知・細川啓祐・横山竜宏・Huixin Liu・西山尚典・坂崎貴俊
    • Organizer
      第5回観測ロケットシンポジウム
    • Related Report
      2022 Annual Research Report
  • [Presentation] 3-D structure of ionospheric disturbance over Japan after the eruption of Hunga Tonga-Hunga Ha'apai on 15 January 20222023

    • Author(s)
      斎藤享・野崎太成・山本衛・Nicholas Ssessanga
    • Organizer
      第17回MUレーダー・赤道大気レーダーシンポジウム
    • Related Report
      2022 Annual Research Report
  • [Presentation] Upward propagation of gravity waves and ionospheric perturbation triggered by the 2022 Hunga-Tonga Volcanic Eruption2023

    • Author(s)
      Miyoshi, Y. and Shinagawa, H.
    • Organizer
      28th IUGG general assembly
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 2022 年1 月15 日のトンガ火山噴火に伴う大気圏・電離圏変動のシミュレーション研究2023

    • Author(s)
      品川裕之,三好勉信
    • Organizer
      地球惑星圏学会第154回総会・講演会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 冬季成層圏と夏季中間圏の半球間結合2023

    • Author(s)
      足立拓馬,三好勉信
    • Organizer
      地球惑星圏学会第154回総会・講演会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Imaging observation of the airglow from the International Space Station with ISS-IMAP/VISI2023

    • Author(s)
      A. Saito, T. Sakanoi, Y. Hozumi, S. Andoh, S. Perwitasari
    • Organizer
      The International Union of Geodesy and Geophysics (IUGG)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Real-time Ionosphere Observations with a Dense GNSS Network by a Three-dimensional Tomography Technique2023

    • Author(s)
      Saito, S., Nozaki, T., Ssessanga, N., Yamamoto, M.
    • Organizer
      AOGS2023
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Three-dimensional structure of the ionospheric disturbances over Japan following the eruption of Hunga Tonga-Hunga Ha'apai on 15 January 20222023

    • Author(s)
      Saito, S., Nozaki, T., Ssessanga, N., Yamamoto, M.
    • Organizer
      AOGS2023
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Characterization of Ionospheric Spatial Decorrelation for GNSS-based Aeronautical Navigation Systems2023

    • Author(s)
      Saito, S., Nakamura, M., Yoshihara, T., Minh, L. H., Thang, N. C., Supriadi, S., Abadi, P., Prabowo, D. U
    • Organizer
      URSI GASS 2023
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Equinoctial asymmetry of plasma bubble occurrence and electric field at evening: GPS and ionosonde measurements in Southeast Asia2023

    • Author(s)
      Yuichi Otsuka, Prayitno Abadi, Kornyanat Hozumi, Alif Almahi
    • Organizer
      3rd International Workshop on Equatorial Plasma Bubbles (EPB‐3)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] VHF Radar Observations of Field-Aligned Irregularities at Low and Middle Latitudes2023

    • Author(s)
      Yuichi Otsuka
    • Organizer
      International Meridian Circle Program(IMCP) 2023 Space Weather School
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] GNSS observations of traveling ionospheric disturbances in the ionosphere2023

    • Author(s)
      Yuichi Otsuka
    • Organizer
      AAPPS-DPP2023
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Plasmaspheric Total Electron Content Variations obtained from GPS Total Electron Content Data2023

    • Author(s)
      Yuichi Otsuka, Zhiyu Chen, Atsuki Shinbori, Takuya Sori, Kazuo Shiokawa, Septi Perwitasari, Michi Nishioka, Fuminori Tsuchiya, Atsushi Kumamoto, Yoshiya Kasahara, Yoshizumi Miyoshi, Masahiro Kitahara, Satoko Nakamura, Ayako Matsuoka, Iku Shinohara
    • Organizer
      URSI GASS 2023
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Equinoctial asymmetry of GPS scintillation occurrence and drift velocities at post-sunset in Southeast Asia2023

    • Author(s)
      Yuichi Otsuka, Prayitno Abadi, Kornyanat Hozumi, Alif Almahi
    • Organizer
      URSI GASS 2023
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Four-Minute Total Electron Content Fluctuations over Japan after the 2022 Hunga Tonga Hunga Ha'apai Volcanic Eruption2023

    • Author(s)
      大塚 雄一 Fu Weizheng
    • Organizer
      地球電磁気・地球惑星圏学会2023年秋季年会(第154回講演会・総会)
    • Related Report
      2022 Annual Research Report
  • [Presentation] Development of Technique for Estimating Plasmaspheric Total Electron Content Variations from GPS Total Electron Content Data2023

    • Author(s)
      Yuichi Otsuka, Zhiyu Chen, Atsuki Shinbori, Takuya Sori, Kazuo Shiokawa, Septi Perwitasari, Michi Nishioka
    • Organizer
      IRI workshop
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 赤道MUレーダー計画の現状20222022

    • Author(s)
      山本衛・橋口浩之・横山竜宏・西村耕司・津田敏隆
    • Organizer
      日本地球惑星科学連合2022年大会
    • Related Report
      2022 Annual Research Report
  • [Presentation] S-520-32号機観測ロケットからご地上までの2周波ビーコン観測-観測機器の開発と結果の速報-2022

    • Author(s)
      山本衛・高橋透・芦原祐樹
    • Organizer
      第16回MUレーダー・赤道大気レーダーシンポジウム
    • Related Report
      2022 Annual Research Report
  • [Presentation] MUレーダー外付け受信専用アンテナを用いたアダプティブクラッター抑圧システムの開発2022

    • Author(s)
      橋口浩之・矢吹諒・西村耕司
    • Organizer
      日本地球惑星科学連合2022年大会
    • Related Report
      2022 Annual Research Report
  • [Presentation] A Review on Equatorial Atmosphere Radar (EAR) Observations - Turbulent layer and ozone vertical distribution in tropical tropopause layer (TTL) based on Strateole-2 pre-campaign -2022

    • Author(s)
      Hiroyuki Hashiguchi
    • Organizer
      2nd INternational Conference on Radioscience, Equatorial Atmospheric Science and Environment (INCREASE)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Long-term Statistical Analysis of Ionospheric Irregularities Observed by the MU Radar and Equatorial Atmosphere Radar2022

    • Author(s)
      Yokoyama, T., T. Ishii, T. Yutani, and M. Yamamoto
    • Organizer
      Asia Oceania Geosciences Society 19th Annual Meeting
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 赤道大気レーダーで観測された150kmエコーの太陽・地磁気活動依存性2022

    • Author(s)
      横山 竜宏, 高木 理絵子, 山本 衛
    • Organizer
      第152回 地球電磁気・地球惑星圏学会講演会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 赤道大気レーダーで観測された150kmエコーの太陽・地磁気活動依存性2022

    • Author(s)
      横山 竜宏, 高木 理絵子, 山本 衛
    • Organizer
      第15回MUレーダー・赤道大気レーダーシンポジウム
    • Related Report
      2022 Annual Research Report
  • [Presentation] MUレーダー観測とイオノゾンデ自動読み取りシステムを用いた電子密度の長期統計解析2022

    • Author(s)
      横山 竜宏, 増田 秀人, 劉 鵬, 山本 衛
    • Organizer
      日本地球惑星科学連合2022年大会
    • Related Report
      2022 Annual Research Report
  • [Presentation] MUレーダーと赤道大気レーダーによる電離圏イレギュラリティ観測の長期統計解析2022

    • Author(s)
      横山 竜宏, 石井 達也, 湯谷 樹生, 山本 衛
    • Organizer
      日本地球惑星科学連合2022年大会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Daytime 150-km field-aligned irregularity echoes observed by a VHF radar at Chumphon, Thailand2022

    • Author(s)
      Y. Otsuka, K. Hozumi, M. Nishioka, T. Tsugawa, S. Saito, P. Supnithi, and P. Jamjareegulgarn
    • Organizer
      日本地球惑星科学連合2022年大会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Zonal Asymmetry of the daytime 150-km echo observed by a VHF radar at Chumphon, Thailand2022

    • Author(s)
      Y. Otsuka, K. Hozumi, M. Nishioka, T. Tsugawa, S. Saito, P. Supnithi, and P. Jamjareegulgarn
    • Organizer
      16th International Symposium on Equatorial Aeronomy (ISEA-16)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] タイ・チュンポンにおける下向きに伸びる沿磁力線不規則構造のVHFレーダー観測2022

    • Author(s)
      大塚雄一・塩川和夫・Kornyanat Hozumi・西岡未知・津川卓也・斎藤享・Pornchai Supnithi・Punyawi Jamjareegulgarn・山本衛
    • Organizer
      第16回MUレーダー・赤道大気レーダーシンポジウム
    • Related Report
      2022 Annual Research Report
  • [Presentation] 成層圏準2 年周期振動が引き起こす中間圏・下部熱圏の東西風変動について2022

    • Author(s)
      菅田 凌生, 三好 勉信
    • Organizer
      地球惑星圏学会第152回総会・講演会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Multi-day oscillations in the equatorial ionosphere during the 2019 Antarctic sudden stratwarming: mixed response to forcing from above and below2022

    • Author(s)
      H. Liu, Y. Otsuka, K. Hozumi, M. Kogure, and T. Yu
    • Organizer
      日本地球惑星科学連合2022年大会
    • Related Report
      2022 Annual Research Report
  • [Presentation] ISS-IMAP/VISI によって観測された赤道中間圏 における高輝度大気光構造2022

    • Author(s)
      齊藤昭則, 坂野井健, 穂積裕太
    • Organizer
      地球電磁気・地球惑星圏学会第152回講演会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Bright bands of the mesospheric airglow observed from the international space station2022

    • Author(s)
      Saito, A., T. Sakanoi, and Y. Hozumi
    • Organizer
      日本地球惑星科学連合2022年大会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Disturbances in the Mesosphere and the Ionosphere Elucidated by Airglow Imaging Observation from the International Space Station2022

    • Author(s)
      Saito, A., Y. Hozumi, T. Sakanoi, Septi Perwitasari, and IMAP working group
    • Organizer
      The 13th Symposium on Polar Science
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Bright Band-Like Structures of the Mesospheric Airglow in the Equatorial Region Elucidated by Imaging2022

    • Author(s)
      Saito, A., T. Sakanoi, Y. Hozumi, and Septi Perwitasari
    • Organizer
      16th International Symposium on Equatorial Aeronomy
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Ionospheric irregularities and scintillations during the geomagnetic storm on 15 January 20222022

    • Author(s)
      Saito, S., Yoshihara, T., Takahashi, T.
    • Organizer
      日本地球惑星科学連合2022年大会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Ionospheric disturbances over Japan and Australia following the eruption of Hunga Tonga- Hunga Ha'apai on 15 January 20222022

    • Author(s)
      Saito, S., Otsuka, Y., Shinbori, A., Souri, T., Nishioka, M., Pewitasari, S.
    • Organizer
      日本地球惑星科学連合2022年大会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Improved real-time three-dimensional tomography based on GNSS and ionosonde observations2022

    • Author(s)
      Saito, S., Kawakami, K., Ssessanga, N., Yamamoto, M.
    • Organizer
      日本地球惑星科学連合2022年大会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Unusual ionospheric disturbances and irregularities following the eruption of Hunga Tonga-Hunga Ha'apai on 15 January 20222022

    • Author(s)
      Saito, S., Yoshihara, T., Takahashi, T.
    • Organizer
      16th International Symposium on Equatorial Aeronomy
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Impacts on GNSS by ionospheric irregularities observed over Japan on 15 January 20222022

    • Author(s)
      Saito, S., Yoshihara, T., Takahashi, T.
    • Organizer
      地球電磁気・地球惑星圏学会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Daytime 150-km field-aligned irregularity echoes observed by a VHF radar at Chumphon, Thailand2022

    • Author(s)
      Y. Otsuka, K. Hozumi, M. Nishioka, T. Tsugawa, S. Saito, P. Supnithi, P. Jamjareegulgarn
    • Organizer
      Japan Geoscience Union Meeting 2022
    • Related Report
      2022 Annual Research Report
  • [Presentation] Zonal Asymmetry of the daytime 150-km echo observed by a VHF radar at Chumphon, Thailand2022

    • Author(s)
      Y. Otsuka, K. Hozumi, M. Nishioka, T. Tsugawa, S. Saito, P. Supnithi, P. Jamjareegulgarn
    • Organizer
      16th International Symposium on Equatorial Aeronomy
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Recent results of the total electron content measurements for the ionospheric disturbances using global GNSS receiver networks2022

    • Author(s)
      Yuichi Otsuka, Atsuki Shinbori, Takuya Sori, Michi Nishioka, and Septi Perwitasari
    • Organizer
      AGU Fall meeting
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] タイ・チュンポンにおける下向きに移動する 沿磁力線不規則構造のVHF レーダー観測2022

    • Author(s)
      大塚雄一、塩川和夫、KornyanatHozumi、西岡未知、津川卓也、斎藤享、PornchaiSupnithi、PunyawiJamjareegulgarn、山本衛
    • Organizer
      第152回 地球電磁気・地球惑星圏学会講演会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Study of coupling processes in the solar-terrestrial system =Current status in 2021=2021

    • Author(s)
      Mamoru Yamamoto, Hiroyuki Hashiguchi, Tatsuhiro Yokoyama, Hiroshi Miyaoka, Yasunobu Ogawa, Kazuo Shiokawa, Satonori Nozawa, Akimasa Yoshikawa, Toshitaka Tsuda
    • Organizer
      Jaapan Geoscience Union Meeting 2021
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Status of Equatorial MU Radar project in 20212021

    • Author(s)
      Mamoru Yamamoto, Hiroyuki Hashiguchi, Tatsuhiro Yokoyama, Toshitaka Tsuda
    • Organizer
      Jaapan Geoscience Union Meeting 2021
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Development of instruments for dual-band beacon (DBB) experiment of total electron content (TEC)2021

    • Author(s)
      Mamoru Yamamoto
    • Organizer
      Jaapan Geoscience Union Meeting 2021
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Study of ionospheric E-region irregularities by Equatorial Atmosphere Radar during annular solar eclipse2021

    • Author(s)
      Tatsuhiro Yokoyama, Rieko Takagi, Mamoru Yamamoto, Kornyanat Hozumi, Chihiro Tao, Hiroyuki Shinagawa
    • Organizer
      Jaapan Geoscience Union Meeting 2021
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Development of multi-scale numerical simulation model for the study on ionospheric disturbances2021

    • Author(s)
      Tatsuhiro Yokoyama, Taichi Komoto
    • Organizer
      Jaapan Geoscience Union Meeting 2021
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Scintillation Drift Velocity Observed by Closely-Spaced GPS Receivers in Indonesia2021

    • Author(s)
      Yuichi Otsuka, Abadi Prayitno
    • Organizer
      Jaapan Geoscience Union Meeting 2021
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Equatorial Atmosphere Radar and Future Project2021

    • Author(s)
      Mamoru Yamamoto
    • Organizer
      International Conference on Radioscience, Equatorial Atmospheric Science and Environment and Humanosphere Science, 2021
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Observations of turbulent layer and ozone vertical distribution in tropical tropopause layer2021

    • Author(s)
      Hiroyuki Hashiguchi, Momoko Hashino, Richard, Wilson, Shinya Ogino and Junko Suzuki
    • Organizer
      International Conference on Radioscience, Equatorial Atmospheric Science and Environment and Humanosphere Science, 2021
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Variability of the thermosphere-ionosphere system2021

    • Author(s)
      Y. Miyoshi
    • Organizer
      International Conference on Radioscience, Equatorial Atmospheric Science and Environment and Humanosphere Science, 2021
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Scintillation Drift Velocity Observed by Closely-Spaced GPS Receivers in Indonesia2021

    • Author(s)
      Yuichi Otsuka and Prayitno Abadi
    • Organizer
      International Conference on Radioscience, Equatorial Atmospheric Science and Environment and Humanosphere Science, 2021
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Development of Multi-scale Numerical Simulation Model for the Study on Ionospheric Disturbances2021

    • Author(s)
      Yokoyama, T., and T. Komoto
    • Organizer
      Asia Oceania Geosciences Society 18th Annual Meeting
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 赤道大気レーダーで観測されたプラズマバブルと150kmエコーの長期統計解析,2021

    • Author(s)
      横山 竜宏, 杉野 創, 高木 理絵子, 劉 鵬, 山本 衛
    • Organizer
      第15回MUレーダー・赤道大気レーダーシンポジウム
    • Related Report
      2021 Annual Research Report
  • [Presentation] 観測ロケット S-520-32 号機による中規模電離圏擾乱観測2021

    • Author(s)
      山本衛、芦原佑樹、石坂圭吾、熊本篤志、白澤秀剛
    • Organizer
      「宇宙空間からの地球超高層大気観測に関する研究会」
    • Related Report
      2021 Annual Research Report
  • [Presentation] 3-D imaging of daytime mid-latitude sporadic E over Japan with ground-based GNSS data2021

    • Author(s)
      Weizheng Fu, Nicholas Ssessanga, Tatsuhiro Yokoyama, Mamoru Yamamoto
    • Organizer
      第150回地球電磁気・地球惑星圏学会講演会
    • Related Report
      2021 Annual Research Report
  • [Presentation] COSMIC-2衛星搭載2周波ビーコン観測による東南アジア域のプラズマバブルに繋がりうる電離圏の長波長変動に関する研究2021

    • Author(s)
      寺田一生, 山本衛
    • Organizer
      第150回地球電磁気・地球惑星圏学会講演会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 観測ロケットから地上までの電離圏全電子数観測システムの開発2021

    • Author(s)
      山本衛, 黒川浩規
    • Organizer
      第150回地球電磁気・地球惑星圏学会講演会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 複数の GNSS 衛星群を用いる低コストな TEC 観測システム開発2021

    • Author(s)
      河上晃治, 山本衛, 斎藤享, Ssessanga Nicholas
    • Organizer
      第150回地球電磁気・地球惑星圏学会講演会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 2019年9月南半球成層圏突然昇温が熱圏・電離圏に及ぼす影響2021

    • Author(s)
      三好 勉信, 山崎 洋介
    • Organizer
      第150回地球電磁気・地球惑星圏学会講演会
    • Related Report
      2021 Annual Research Report
  • [Presentation] GAST D (GBAS approach service type D) in the low latitude region and use for CAT I service2021

    • Author(s)
      S. Saito
    • Organizer
      Proceedings of the 34th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS+ 2021)
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Alternative Architecture for Dual Frequency Multi-Constellation GBAS2021

    • Author(s)
      T. Murphy, M. Harris, G. McGraw, J. Wichgers, L. Lavik, M. Topland, M. Tuffaha, S. Saito
    • Organizer
      Proceedings of the 34th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS+ 2021)
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Observations of the ionosphere by a GNSS network and application for GNSS-based navigation2021

    • Author(s)
      S. Saito
    • Organizer
      International Conference on Space, Aeronautical and Navigation Electronics 2021
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Ionospheric Characterization for GBAS in the low latitude region2021

    • Author(s)
      S. Saito
    • Organizer
      The 2nd International Symposium on Space Science
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 電離圏擾乱の研究に資するマルチスケール数値シミュレーションの開発2021

    • Author(s)
      横山 竜宏, 古元 泰地
    • Organizer
      STEシミュレーション研究会・KDKシンポジウム合同研究会
    • Related Report
      2020 Annual Research Report
  • [Presentation] 高精細プラズマバブルモデルの現在と今後の展望2021

    • Author(s)
      横山 竜宏
    • Organizer
      2020年度ISEE研究集会「太陽地球圏環境予測のためのモデル研究の展望」
    • Related Report
      2020 Annual Research Report
  • [Presentation] 高精細プラズマバブルモデルとGAIAモデルの結合に向けた マルチスケール数値モデルの開発2021

    • Author(s)
      横山 竜宏, 古元 泰地
    • Organizer
      GAIA研究会
    • Related Report
      2020 Annual Research Report
  • [Presentation] Development of transmitter and antenna on board of sounding rocket for the TEC measurement2020

    • Author(s)
      Koki Kurokawa, Mamoru Yamamoto
    • Organizer
      JpGU-AGU Joint Meeting 2020
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Status of Equatorial MU Radar project in 20202020

    • Author(s)
      Mamoru Yamamoto, Hiroyuki Hashiguchi, Tatsuhiro Yokoyama, Toshitaka Tsuda
    • Organizer
      JpGU-AGU Joint Meeting 2020
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Ionospheric observations by Equatorial Atmosphere Radar during annular eclipse in December 20192020

    • Author(s)
      Rieko Takagi, Tatsuhiro Yokoyama, Mamoru Yamamoto, Kornyanat Hozumi
    • Organizer
      JpGU-AGU Joint Meeting 2020
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Long-term statistical analysis of the ionospheric observation with the MU radar2020

    • Author(s)
      Tatsuhiro Yokoyama, Masanori Ueno, Mamoru Yamamoto
    • Organizer
      JpGU-AGU Joint Meeting 2020
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Ionospheric responses on the 21 August 2017 solar eclipse by using three-dimensional GNSS tomography2020

    • Author(s)
      Chia-Hung Chen, Charles Lin, Akinori Saito, Mamoru Yamamoto, Susumu Saito
    • Organizer
      JpGU-AGU Joint Meeting 2020
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Development of Software-Defined Multichannel Receiver for Equatorial Atmosphere Radar (EAR)2020

    • Author(s)
      Hiroyuki Hashiguchi, Nor Azlan Bin Mohd Aris, Mamoru Yamamoto
    • Organizer
      JpGU-AGU Joint Meeting 2020
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Study of daily and seasonal variation of the equatorial ionization anomaly in Asia based on satellite-ground beacon experiment2020

    • Author(s)
      Mamoru Yamamoto, Yuki Sakamoto, Kornyanat Hozumi
    • Organizer
      JpGU-AGU Joint Meeting 2020
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Study of coupling processes in the solar-terrestrial system = Current status in 2020 =2020

    • Author(s)
      Mamoru Yamamoto, Hiroyuki Hashiguchi, Tatsuhiro Yokoyama, Hiroshi Miyaoka, Yasunobu Ogawa, Kazuo Shiokawa, Satonori Nozawa, Akimasa Yoshikawa, Toshitaka Tsuda
    • Organizer
      JpGU-AGU Joint Meeting 2020
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Effect of equatorial plasma bubbles on midlatitude region2020

    • Author(s)
      Yokoyama, T., H. Shinagawa, and Y. Otsuka
    • Organizer
      JpGU-AGU Joint Meeting 2020
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Long-term statistical analysis of the ionospheric observation with the MU radar2020

    • Author(s)
      Yokoyama, T., M. Ueno, and M. Yamamoto
    • Organizer
      JpGU-AGU Joint Meeting 2020
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] A study of equatorial plasma bubble structure using VHF radar and GNSS scintillations over the low-latitude region2020

    • Author(s)
      A. Bumrungkit, S. Saito, P. Supnithi
    • Organizer
      JpGU-AGU Joint Meeting 2020
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] MU RadarActive Phased Array Atmospheric Radar2020

    • Author(s)
      Mamoru Yamamto and Hiroyuki Hashiguchi
    • Organizer
      "Technology for Next Generation Space-Earth Environmental Radio Science", a workshop by ISEE
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Variability of the thermosphere-ionosphere system2020

    • Author(s)
      Y. Miyoshi
    • Organizer
      International Symposium on Physics (Campina Grande, Brazil)
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Multi-band digital beacon receiver GRBR2 and results with FORMOSAT-7/COSMIC-22020

    • Author(s)
      Mamoru Yamamoto, T.-Y. Hsiao, Charles Lin, Roland Tsunoda, Rick Doe
    • Organizer
      5th International Conference on GPS Radio Occultation in 2020
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 衛星=地上の電離圏全電子数観測手法の開発状況2020

    • Author(s)
      山本衛
    • Organizer
      第14回MUレーダー・赤道大気レーダーシンポジウム
    • Related Report
      2020 Annual Research Report
  • [Presentation] MUレーダーによる電離圏IS観測の長期統計解析2020

    • Author(s)
      横山竜宏・上野将典・山本衛
    • Organizer
      第14回MUレーダー・赤道大気レーダーシンポジウム
    • Related Report
      2020 Annual Research Report
  • [Presentation] 観測ロケットに搭載するデュアルバンド・ビーコン送信機とアンテナの開発2020

    • Author(s)
      黒川浩規・山本衛
    • Organizer
      第14回MUレーダー・赤道大気レーダーシンポジウム
    • Related Report
      2020 Annual Research Report
  • [Presentation] 衛星=地上間の電離圏全電子数観測の開発状況2020

    • Author(s)
      山本 衛, 斎藤 享
    • Organizer
      第148回地球電磁気・地球惑星圏学会講演会
    • Related Report
      2020 Annual Research Report
  • [Presentation] 赤道プラズマバブルの急速な発達と中緯度帯への影響2020

    • Author(s)
      横山 竜宏, 品川 裕之, 陣 英克, 大塚 雄一
    • Organizer
      第148回地球電磁気・地球惑星圏学会講演会
    • Related Report
      2020 Annual Research Report
  • [Presentation] 2019年9月成層圏突然昇温時に現れた電離圏6日振動の励起機構2020

    • Author(s)
      三好 勉信, 山崎 洋介
    • Organizer
      第148回地球電磁気・地球惑星圏学会講演会
    • Related Report
      2020 Annual Research Report
  • [Presentation] 赤道大気レーダーによる2019年12月の金環日食時の電離圏観測2020

    • Author(s)
      高木 理絵子, 横山 竜宏,山本 衛, Hozumi Kornyanat
    • Organizer
      第148回地球電磁気・地球惑星圏学会講演会
    • Related Report
      2020 Annual Research Report
  • [Presentation] Complementing regional ground GNSS-STEC computerized ionospheric tomography (CIT) with ionosonde data assimilation2020

    • Author(s)
      Ssessanga Nicholas, 山本 衛, 斎藤 享, 齊藤 昭則, 西岡 未知
    • Organizer
      第148回地球電磁気・地球惑星圏学会講演会
    • Related Report
      2020 Annual Research Report
  • [Funded Workshop] International Conference on Radioscience, Equatorial Atmospheric Science and Environment and Humanosphere Science, 20212021

    • Related Report
      2021 Annual Research Report

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Published: 2020-04-28   Modified: 2024-12-25  

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