Spatiotemporal variations of electron precipitation from Geospace as revealed by international joint observations using optical and radio techniques

使用光学和无线电技术的国际联合观测揭示了地球空间电子降水的时空变化

• 批准号: 21KK0059
• 负责人: 細川 敬祐
• 金额: $ 12.31万
• 依托单位: The University of Electro-Communications
• 依托单位国家: 日本
• 项目类别: Fund for the Promotion of Joint International Research (Fostering Joint International Research (B))
• 财政年份: 2021
• 资助国家: 日本
• 起止时间: 2021-10-07 至 2026-03-31
• 项目状态: 未结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-21KK0059/
• 关键词: ジオスペース; 電子降下; オーロラ; 電波計測; 光学観測

国際共同の枠組みによって，新たな「光と電波を用いた広域観測網」を構築し，オーロラと降下電子の双方を広い領域で面的に観測することを目的として，フィンランドへの電波観測機器の設置作業を行った．リオメータの設置については，海外研究協力者であるソダンキラ地球物理観測所（Sodankyla Geophysical Observatory: SGO）の Antti Kero 博士と連携し，2022 年 10 月にフィンランド北西部のキルピスヤルビに 1 式の多周波数リオメータを設置し，観測を開始した．キルピスヤルビの電磁環境は良好で，機器の設置後約半年にわたって継続的に良質のデータが取得できている．また，VLF 受信観測についても，SGO の Jyrki Manninen 博士のサポートを受け，2022 年 10 月にフィンランド南部のオウルヤルビに機器の設置を行うことができた．オウルヤルビの電磁環境も良好で，質の良い自然電磁波の計測を行うことができている．すでに北欧 5 地点において実施している高感度カメラによる光学観測については，2022 年冬季シーズンの観測を継続した．欧州非干渉散乱レーダー（EISCAT レーダー）による特別実験も 2022 年 12 月に実施し，ジオスペースからの電子降下に伴う低高度電離現象の事例を多数得ることができている．今後観測が本格化するリオメータや VLF 電波観測，化学シミュレーションを組み合わせることによって，オーロラに伴うジオスペース電子降下の時空間変動，オーロラの形態による特性の違い，大気への影響を定量的に明らかにすることが期待できる．

The international common equipment group, the new "optical airwave wireless domain test", the new "optical airwave wireless domain measurement", the new "optical airwave wireless domain measurement", the new "optical airwave wireless domain measurement", the new "optical airwave wireless domain measurement", the new "optical airwave wireless domain measurement", the new "optical airwave wireless domain measurement", the new "optical airwave radio domain measurement", the new "optical airwave radio domain measurement", the new "optical airwave radio domain measurement", the new "optical airwave radio domain measurement", the new "optical airwave radio domain measurement", the new "optical airwave radio domain measurement", the new "optical airwave radio domain measurement", the new "optical airwave radio domain measurement", the new "optical airwave radio domain measurement", the new "optical airwaves", the "optical airwaves", Dr. Antti Kero of the Institute of Geophysics (Sodankyla Geophysical Observatory: SGO), who worked with overseas research collaborators, set up a multi-cycle wavenumber receiver in October 2022 in the western and northern parts of the country. The magnetic environment is good. About half a year after the installation of the machine, the quality of the equipment was obtained. The VLF was trusted and Dr. SGO Jyrki Manninen was affected. In October 2022, the equipment was set up in the south of the country. The electronic and magnetic environment is good. In the winter of 2022, there was a significant increase in the number of light waves in the winter of 2022. In Europe, there is a significant increase in the number of high-sensitivity optical waves in 5 locations in northern Europe. In the winter of 2022, there is a significant increase in the number of light waves in the winter of 2022. The European non-dry dispersion system (EISCAT) is specially designed for December 2022. Most of the incidents associated with low-altitude quarantine events have been classified as VLF airwaves, chemical airwaves, and airwaves. I am looking forward to the amount of money I need to know.

项目成果

Studies of pulsating aurorae: simultaneous observations with the Arase satellite and optical instruments in the Arctic

脉动极光的研究：Arase卫星和北极光学仪器的同步观测

• 发表时间: 2023
• 作者: K. Hosokawa;Y. Miyoshi;M. Ozaki;S.-I. Oyama;Y. Ogawa;S. Kurita;Y. Kasahara;Y. Kasaba;S. Yagitani;S. Matsuda;F. Tsuchiya;A. Kumamoto;et al.
• 通讯作者: et al.

On the Importance of Using Event‐Specific Wave Diffusion Rates in Modeling Diffuse Electron Precipitation

• DOI: 10.1029/2021ja029918
• 发表时间: 2022-04
• 期刊: Journal of Geophysical Research: Space Physics
• 作者: Yiqun Yu;K. Hosokawa;B. Ni;V. Jordanova;Y. Miyoshi;Jinbin Cao;X. Tian;Long Ma

Studies of pulsating aurorae during Arase era

荒濑时代脉动极光的研究

• 发表时间: 2022
• 作者: Keisuke Hosokawa;Yoshizumi Miyoshi;Mitsunori Ozaki;Shin-Ichiro Oyama;Yasunobu Ogawa;Satoshi Kurita;Yoshiya Kasahara;Yasumasa Kasaba;Satoshi Yagitani;Shoya Matsuda;Fuminori Tsuchiya;Atsushi Kumamoto;Ryuho Kataoka;Kazuo Shiokawa et al.
• 通讯作者: Kazuo Shiokawa et al.

Swedish Institute of Space Physics(スウェーデン)

瑞典空间物理研究所（瑞典）

Periodicities and Colors of Pulsating Auroras: DSLR Camera Observations From the International Space Station

• DOI: 10.1029/2021ja029564
• 发表时间: 2021-10-01
• 期刊: JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
• 影响因子: 2.8
• 作者: Nanjo, Sota;Hozumi, Yuta;Kurita, Satoshi
• 通讯作者: Kurita, Satoshi